Amir hooshang Jalali; Ahmad Mousapour Gorji
Articles in Press, Accepted Manuscript, Available Online from 02 August 2020
Abstract
Reduce potato yield have increased in recent years under adverse conditions, such as water stress. The effects of water stress on yield and yield component of three potato cultivars evaluated at the 2019 growing season. This investigation was arranged as split-plot experiment based in the randomized ...
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Reduce potato yield have increased in recent years under adverse conditions, such as water stress. The effects of water stress on yield and yield component of three potato cultivars evaluated at the 2019 growing season. This investigation was arranged as split-plot experiment based in the randomized complete block design with three replications at Rozveh Agricultural Research Station (Chadegan, Isfahan, Iran). Main-plots were assigned to irrigation levels (75% and 100% field capacity) and sub-plots to potato cultivars (Marfona, Agria and Atousa). To ensure the initial establishment of the plant and to prevent severe crop failure, one additional irrigation was performed at the establishment stage and two supplementary irrigation were performed at the tuber initiation stage for all plots. There was a significant interaction between irrigation level and cultivars for tuber yields (α
Hanifeh Seyed Hajizadeh; zohreh Mani; fataneh yari; fahimeh gholizadeh vakilkandi
Articles in Press, Accepted Manuscript, Available Online from 19 August 2020
Abstract
Water imbalance and vascular occlusion are two serious factors in sort lasting of cut gerbera. In order to evaluate the potential of essential oils as an alternative to chemicals in the protective solution, a factorial experiment was conducted in a completely randomized design with four replications. ...
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Water imbalance and vascular occlusion are two serious factors in sort lasting of cut gerbera. In order to evaluate the potential of essential oils as an alternative to chemicals in the protective solution, a factorial experiment was conducted in a completely randomized design with four replications. Treatments contain 8-hydroxyquinoline sulfate (0, 100 ppm) and thyme and savory essential oils (250, 500 ppm). Preservative solutions including distilled water and 8-HQS were considered as controls. Then every week days in addition to evaluation of flower longevity, physiological parameters, plant water relations and bactericidal population were measured, too. The results showed that the protective solution contains 250ppm of Thyme essential oil offered 8.6 days longer vase life than the control. 500ppm savory had the best performance to protect the petal membrane stability, compared to both controls (distilled water or 8-HQS) at the end of the experiment. Gerbera petals, which were treated with thyme essential oil at 250 ppm, showed more freshness and had higher water content than other treatments, even in comparison with 8-HQS. During longevity anthocyanin and dry matter had the increasing trend and Tss showed a decreasing trend. The antibacterial properties of the essential oils were significantly established in respect to the desired results of growth controlling of the microbial population in the preservative solution, even compared to 8-HQS, so it seems that the essential oils are well alternative for antibacterial chemicals and even could reduce the harmful environmental side-effect of conventional preservative.
masoud fattahi; Abdorahman Mohammadkhani; Behroz Shiran; Bahram Baninasab; Rodabe Ravash
Articles in Press, Accepted Manuscript, Available Online from 23 September 2020
Abstract
An experiment was achieved to compare the resistance of different mycorrhizal pistachio rootstocks to salinity and drought stress in completely randomized design with three replications. In this experiment, we used of Funneliformis mosseae and four pistachio species, Badami-e Riz Zarand, Qazvini, Sarakhs ...
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An experiment was achieved to compare the resistance of different mycorrhizal pistachio rootstocks to salinity and drought stress in completely randomized design with three replications. In this experiment, we used of Funneliformis mosseae and four pistachio species, Badami-e Riz Zarand, Qazvini, Sarakhs and UCB1. In addition, experiment of water stress in 4 levels (100, 80, 60 and 40% FC), and experiment of salinity stress in 4 levels (0.91, 7.57, 16.12 and 24.63 dSm-1), were applied for 60 days. At the end of experiment, different characteristic such as total biomass, leaf area, tissue moisture percentage and electrolyte leakage was measured. Also, during of experiment total chlorophyll, carotenoids and anthocyanin pigments were survey and analyzed. The results indicated that mycorrhizal symbiosis improved total biomass, leaf moisture content under both of drought and salinity stress. Under both stress conditions, tissue moisture content and total leaf chlorophyll content was decreased and anthocyanin content and electrolyte leakage increased and the lowest leaf, stem and root moisture content were observed at the highest drought and salinity levels. UCB1 had the highest biomass and moisture under salinity stress and the highest leaf and stem moisture content and lowest electrolyte leakage was observed in Sarakhs rootstock under drought stress. It seems UCB1 and Sarakhs symbiotic with mycorrhiza can be useful for salinity and drought stress respectively.
sahar keramati; Ahmad Gholami; Mehdi Baradaran; Hamid Abbasdokht
Articles in Press, Accepted Manuscript, Available Online from 10 October 2020
Abstract
In order to investigate the role of foliar application of yeast extract on physiological and Biochemical properties of cowpea (Vigna sinensis L.) under drought stress conditions. A factorial experiment as a randomized complete block design with three replications in Agriculture Campus of Shahrood University ...
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In order to investigate the role of foliar application of yeast extract on physiological and Biochemical properties of cowpea (Vigna sinensis L.) under drought stress conditions. A factorial experiment as a randomized complete block design with three replications in Agriculture Campus of Shahrood University of Technology (placed in Bastam) during 2017 in drought stress and foliar application of yeast extract was conducted. Drought stress was in two stages of 50 present flowering and 50 present pod formation with control treatment (without irrigation interruption). Foliar application of yeast extract (two, four, six g / L and control) was repeated two times with seven days interval and the first time was 30 days after planting. The results showed that drought stress decreased relative water content of leaves. In contrast, relative water content (5.82%), proline content (30.74%), leaf flavonoid (83%), nitrogen (3.82%), phosphorus (22.22%) and potassium (43%) Among the traits that increased with the use of yeast extract compared to control treatment. six g / L yeast extract increased grain yield (1.02 t ha-1), leaf anthocyanin (0.072 mg /g fresh weight), proline (31.62 mg /g fresh weight) Was. It is concluded that a concentration of six g / L of yeast extract can be useful in reducing the severity of drought stress. the yeast extract can act as an ecological strategy to improve the defensive response against environmental stresses
Mohammad Khademi; Faezeh Zaefarian; Shahram Nazari; Mohammad Ali Esmaeili
Articles in Press, Accepted Manuscript, Available Online from 10 October 2020
Abstract
In order to investigate the effect of seed priming on emergence characteristics, root morphological growth and phenological trends of rice in direct seeding, an experiment was conducted as factorial in a randomized complete block design with three replications. Factors included Tarom and Shiroudi cultivars ...
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In order to investigate the effect of seed priming on emergence characteristics, root morphological growth and phenological trends of rice in direct seeding, an experiment was conducted as factorial in a randomized complete block design with three replications. Factors included Tarom and Shiroudi cultivars and priming at five levels including hydropriming (for 48 hours), calcium chloride and potassium chloride priming (Ψs -1.25 MPa), ascorbate acid (10 mg l-1) and control (no priming). The results of the cultivar effect showed that emergence percentage was 88 and 78% and daily emergence rate was 0.2% and 0.15% in Shiroudi and Tarom cultivars, respectively. The effect of priming on emergence percentage showed that the highest amount of this trait was observed by 90% in priming with calcium chloride, which was not significantly different from priming with potassium chloride and water. In Shiroudi and Tarom cultivars, the time required for the onset of tillering was 27.40 and 24.53 days, panicle appearance 90.4 and 53.87 days, flowering 100.53 and 70.87 days, and maturity 132.26 and 94.61 days, respectively. The time required to start of emergence in priming with calcium chloride, potassium chloride, ascorbate acid, water, and control treatments was 4, 4.5, 5.5, 5, and 6.17 days, respectively. The least time required for panicle appearance and flowering was observed in priming with calcium chloride, although it was not significantly different from other priming but decreased by 11.17 and 7.5 days to control, respectively.
Mansour Fazeli Rostampour; Seyyed Gholamreza Moosavi; Hasan Romenjani; shahram mehri; Abouzar Abouzari
Articles in Press, Accepted Manuscript, Available Online from 10 October 2020
Abstract
Due to the hot and dry climates of South Khorasan province, choosing the suitable crop and planting date is very important. In this condition, pearl millet nutrifeed hybrid (Pennisetum americanum var. nutrifeed) can be valuable forage in rotation with other plants. This experiment was carried out in ...
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Due to the hot and dry climates of South Khorasan province, choosing the suitable crop and planting date is very important. In this condition, pearl millet nutrifeed hybrid (Pennisetum americanum var. nutrifeed) can be valuable forage in rotation with other plants. This experiment was carried out in 2017-2018 in strip split plots design in time in Azad university research field, Birjand. The treatments were including 4 sowing dates (8 April, 28 April, 18 May and 7 June), 3 irrigation regime (providing 100, 75 and 50 percent of the plant water needs based on the plant potential evatranspiration) and two cuttings in a completely random blocks design with three replications. The highest water use efficiency was observed in providing 50% of water needs and the 8 April along with the first and second cuttings. With the delay in planting date from 8 April to 7 June, the forage dry matter yield of millet decreased by 24.4% in supplying 100% of water needs. This decrease was 24.2 and 46.9, respectively, in supplying 75 and 50% of water needs. Therefore, by supplying 75% of pearl millet water needs and planting date of 8 April, with a 25% reserve of water consumption the dry matter yield is acceptable.
mehdi taheri asghari
Articles in Press, Accepted Manuscript, Available Online from 13 October 2020
Abstract
In order to investigate the effect of municipal sewage sludge and Azotobacter and Azospirillum on some nitrogen indices and fatty acid composition, an experiment was conducted in the field of south of Tehran in Water and Wastewater Company during 2016-2017 and 2017-2018 Crop years. The experiment was ...
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In order to investigate the effect of municipal sewage sludge and Azotobacter and Azospirillum on some nitrogen indices and fatty acid composition, an experiment was conducted in the field of south of Tehran in Water and Wastewater Company during 2016-2017 and 2017-2018 Crop years. The experiment was conducted as a factorial experiment in a randomized complete block design with three replications. Experimental factors include canola seed inoculation (control, inoculation with azotobacter, inoculation with azospirillum) and The use of municipal sewage sludge (control, recommended fertilizer, 10, 20 and 30 tons of sewage sludge). The results showed that the interaction between seed inoculation and sewage sludge treatments on eicosanoic, palmitic and arachidonic fatty acids was significant at 1% . The highest amount of oleic and linoleic acid was obtained from 30 tons of sewage sludge treatment with 61.23 and 18.41 Percent, respectively. Nitrogen uptake efficiency was highest in fertilizer recommendation treatment with Azotobacter (16.79 Percent) . Interaction effects of inoculation and sewage sludge treatments on both trait consumption efficiency and productivity efficiency (agricaltural) were significant at (p ≤ 0.01) in terms of biomass and grain yield. The results indicate that the use of nitrogen fertilizer in proper amount and provide its in a timely manner Combined with inoculation, it could have a greater effect on the Productivity efficiency (agricaltural) index. It can be stated that with the appropriate use of sewage sludge, with the necessary precautions, it can be a good substitute for nitrogen fertilizers.
Jahanfar Daneshian; Farnaz Sahriati; NADIA SAFAVI FARD; Abdollah Hassani
Articles in Press, Accepted Manuscript, Available Online from 13 October 2020
Abstract
.The effect of water deficit stress was evaluated on oil quality and yield of 11 sunflower hybrids in Karaj during 2012 and 2013. Three separate experiments were carried out as the base of randomized complete block design with three replications to apply water deficit stress treatments. Irrigation of ...
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.The effect of water deficit stress was evaluated on oil quality and yield of 11 sunflower hybrids in Karaj during 2012 and 2013. Three separate experiments were carried out as the base of randomized complete block design with three replications to apply water deficit stress treatments. Irrigation of control, mild and severe stress treatments were performed on base of 60, 120 and 180 mm evaporation from Class A evaporation pan, respectively. The results showed that seed yield was decreased about 18% and 33% in mild and sever water deficit stresses. Yield and oil percentage were affected by hybrids and the interaction of year and stress. Barzegar hybrid with an average of 2846 kg/ha had the highest grain yield. It was also in the top group with 43.65% oil. Yield and seed oil percentage were affected by environmental conditions of years. Water deficict stress had not significant effect on oleic and linoleic acids. But, There was a strong negative correlation between oleic and linoleic acids. Hysun 25 and Sirena cultivars were suitable for oil production with higher oleic acid and Barzegar and G6×R-43 are suitable for oil production with higher linoleic acid.
Leyli Golchin; Afshin Tavakoli; Ehsan Mohseni Fard
Articles in Press, Accepted Manuscript, Available Online from 04 November 2020
Abstract
In order to evaluate the increment possibility of safflower seed yield and oil percentage by the application of cytokinin, a split factorial experiment was conducted based on randomized complete block design with four replications at the research farm of Agriculture Faculty, the University of Zanjan ...
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In order to evaluate the increment possibility of safflower seed yield and oil percentage by the application of cytokinin, a split factorial experiment was conducted based on randomized complete block design with four replications at the research farm of Agriculture Faculty, the University of Zanjan during the 2018-2019 and 2019-2020 cropping seasons. In this experiment, irrigation levels included optimal irrigation and drought stress to main plots and safflower cultivars including Sina, Faraman, Parnyan, Gholdasht and Mahaly Esfahan, and three levels of cytokinin (6-Benzyl Aminopurine), including of no-application (control), 50 and 75 μM were allocated to subplots as factorial. At the flowering stage, simultaneously with drought stress safflower plants were sprayed with 6-Benzyl Aminopurine. The results showed that drought stress decreased yield components, seed yield, biological yield, harvest index, oil percentage and oil yield and the application of cytokinin minimized the negative effects of drought stress and increased in the above traits. The highest seed yield was obtained by application of 75 μM of cytokinin with an increase of 30.7 percent compared to the control. Also, among the studied cultivars, the Mahaly Esfahan cultivar under optimal irrigation with an average of 36.09 percent showed a higher oil percentage, compared to the other cultivars. Therefore, the use of cytokinin can be suggested as a solution to decrease drought stress negative effects and enhance seed yield and oil percentage of safflower under optimal irrigation and drought stress conditions.
esmaeil afshoon; Mohammad Reza Jahansooz; Hossein Moghadam; Mostafa Oveisi
Articles in Press, Accepted Manuscript, Available Online from 16 November 2020
Abstract
To study the effect of nitrogen fertilizer and irrigation regimes on some crop growth indices of forage maize under conventional and conservation tillage system, an experiment was conducted in split -split plots on randomized complete block design with three replications in field of University of Tehran ...
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To study the effect of nitrogen fertilizer and irrigation regimes on some crop growth indices of forage maize under conventional and conservation tillage system, an experiment was conducted in split -split plots on randomized complete block design with three replications in field of University of Tehran in 2018. Tillage systems as the main -plot in two factors were including conversation and conventional tillage, Water stress as the subplot was in three levels by 30, 60 and 90 percent of moisture requirement and nitrogen fertilizer as the sub-sub plot was at three levels by 0, 50 and 100 percent of the recommended rate. The results in the flowering stage showed that the highest of leaf area index(6.28) and crop growth rate (34.01 gr m-2 day-1) were obtained from interaction of slightly water stress (90 percent of crop water demand) and nitrogen (100 percent of crop demand) and from interaction of slightly water stress and 100 Percent nitrogen in conventional tillage, respectively. The highest of relative growth rate (0.08 gr gr-1 day-1) and total dry matter (1006.86 gr m-2) were obtained from simple effect of 100 Percent nitrogen and from interaction of slightly water stress and 100 percent nitrogen in conventional tillage, respectively. The results showed that under severe water stress and application of more nitrogen fertilizer will cause less crop dry matter under conventional tillage .
Mojtaba Salehi Sheikhi; Ali Nakhzari Moghaddam; ali Rahemi karizaki; Majid Mohamad Eamaeili
Articles in Press, Accepted Manuscript, Available Online from 03 December 2020
Abstract
In order to investigate the effect of pea )Pisum sativum L.( cultivar and replacement and additive intercropping ratios of pea and spinach )Spinacia oleracea L. (on yield and competition indices, a factorial experiment based on randomized complete block design with three replications was conducted at ...
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In order to investigate the effect of pea )Pisum sativum L.( cultivar and replacement and additive intercropping ratios of pea and spinach )Spinacia oleracea L. (on yield and competition indices, a factorial experiment based on randomized complete block design with three replications was conducted at Gonbad Kavous University research field during 2016-2017. Intercropping ratios at nine levels consisted of pure pea, pure spinach, 33, 50 and 67 percent spinach instead of pea, addition series of 33, 50, 67 and 100 percent spinach to pea and pea cultivars were Shamshiri and Pofaki. Land equivalent ratio and relative crowding coefficient in additive treatments were more than replacement treatments and more than one in all treatments. The highest land equivalent ratio with 1.333 was computed for 100 percent pea+100 percent spinach. In replacement series, pea was as a dominant plant, but in additive series spinach was dominant. No actual yield loss was observed in all treatments. The highest system productivity index was related to 100 percent pea + 100 percent spinach with 3045. Overall, land equivalent ratio over than one and positive system productivity index specially treatment of 100 percent pea+100 percent spinach indicated benefit of intercropping of pea and spinach.
Gholam Akbari; Maryam Rahimi Jahangirlou; Iraj Allah dadi; Saeid Soufizadeh; Maryam Rahimi Jahangirlou
Articles in Press, Accepted Manuscript, Available Online from 12 December 2020
Abstract
Studies to assess quality of dent maize grain are noteworthy because of its wide use as food, feed and ethanol production. This study aimed to evaluate the concentration and composition of starch and oil in maize grain in response to different cultivars (KSC704 and KSC260), planting dates (20 June and ...
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Studies to assess quality of dent maize grain are noteworthy because of its wide use as food, feed and ethanol production. This study aimed to evaluate the concentration and composition of starch and oil in maize grain in response to different cultivars (KSC704 and KSC260), planting dates (20 June and 21 July), irrigation (12-day and 6-day intervals) and nitrogen (0 and 184 kg N ha-1) rate as the strip-plot factorial statistical model during the 2018 growing season in Pakdasht county of Iran. The results suggested that nitrogen application increased grain yield by one tonnes ha-1. In addition, KSC260 had higher grain yield than KSC704 by 0.96 tonnes ha-1. All compositional variables except stearic acid were affected by the interaction effect of irrigation and nitrogen rate. In low irrigated treatments, nitrogen application reduced the amount of oil, palmitic acid, oleic acid, linoleic acid and linolenic acid. In low irrigated condition, nitrogen application had no effect on increasing the concentration of starch and amylopectin. The use of nitrogen fertilizer reduced the amount of stearic acid by 0.05 g kg-1. In conclusion, the balance between irrigation and nitrogen utilization seems to be important for improving the oil and starch properties of maize grain.
raheleh arabameri; afshin soltani; Ebrahim Zeinali; benyanen torabi
Articles in Press, Accepted Manuscript, Available Online from 02 February 2021
Abstract
Yield gap analysis is a quantitative estimate of the possible increase in capacity to provide food for a specified area which is an important component in the design of strategies have delivered the food on a scale of regional, national and global level. In this regard a study was conducted to determine ...
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Yield gap analysis is a quantitative estimate of the possible increase in capacity to provide food for a specified area which is an important component in the design of strategies have delivered the food on a scale of regional, national and global level. In this regard a study was conducted to determine the extent and function of chickpea and lentil crop vacancy distribution in Gorgan University of Agricultural Sciences and Natural Resources in 2016-2018. In this study, using SSM-iCrop2 model, potential yield in chickpea and lentil producing regions in Iran was simulated. For this purpose, the protocol of Atlas Gap Project, called GYGA protocol, was used to identify climatic zones and also to identify important meteorological stations located in chickpea and lentil production areas in the country. After identifying the important stations, the performance potential for the station range was simulated and then the regional results based on the GYGA protocol were generalized to the whole country. For dryland chickpeas in the country, the values of actual yield, potential and yield gap were 0.43, 1.04 and 0.61 tons per hectare, respectively. In the case of rainfed lentils in the country, the values of actual yield, potential and yield gap were 0.43, 1.10 and 0.67 tons per hectare, respectively. This information can be used for better management in low-yield and high-yield areas in the country for these two products.
mohammadsaleh ravan; ali Rahemi karizaki; Abbas Biabani; Ali Nakhzari Moghaddam; ebrahim gholamali pouralmdari
Articles in Press, Accepted Manuscript, Available Online from 02 February 2021
Abstract
In order to investigate the effect of barley cultivars on grain yield, yield components under rainfed conditions as a factorial experiment in a randomized complete block design with four replications at Gonbad-e Kavous University Research Field during 2016 – 2017 and 2017 – 2018 growing seasons. ...
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In order to investigate the effect of barley cultivars on grain yield, yield components under rainfed conditions as a factorial experiment in a randomized complete block design with four replications at Gonbad-e Kavous University Research Field during 2016 – 2017 and 2017 – 2018 growing seasons. Density treatments 200, 300, 400, and 500 grains per square meter were consisted as first and four barley cultivars: Fardan, Khorram, Mahoor, and Sahra as second factors, respectively. The highest and lowest number of grains per spike were obtained from Sahra cultivars at densities of 200 and Mahoor at densities of 500 grains in meter square, respectively; whereas the highest and lowest spike per square meter were for Mahoor and Sahra cultivars, respectively. The highest and lowest thousand grain weight were observed in Fardan and Khorram cultivars, respectively. Maximum grain yield in first and second year of experiment, respectively, was obtained from Mahoor cultivars with 300 grains in meter square and Khorram with 200 grains in meter square, respectively. Higher yield in the second year than in the first year seems to be due to higher rainfall and more appropriate distribution, especially in the reproductive stage and grain filling period. In both years, a negative and strong correlation was observed between the number of spikes per square meter and the number of grains per spike (r=-0.67 and r=-0.83 at first and second years respectively); but this correlation was positive with grain yield.
Mahdieh sheikhaliyan; Yousef Sohrabi; farzad Hossainpanahi; Amir Hossein Shirani rad
Articles in Press, Accepted Manuscript, Available Online from 02 February 2021
Abstract
In order to investigate the interaction between sodium nitroprusside and drought stress on photosynthetic pigments and their relationship with yield and yield components of rapeseed, an experiment was conducted during two cropping years (2015-16 and 2016-17) at Hamedan Agricultural and Natural Resources ...
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In order to investigate the interaction between sodium nitroprusside and drought stress on photosynthetic pigments and their relationship with yield and yield components of rapeseed, an experiment was conducted during two cropping years (2015-16 and 2016-17) at Hamedan Agricultural and Natural Resources Research Center. The experiment was carried out as a factorial in randomized complete block design with three replications. Experimental factors were irrigation levels including full irrigation (control), irrigation termination from beginning silique stage and irrigation termination from grain filling stage, and four treatments of foliar application of sodium nitroprusside with concentrations of 0, 100, 200 and 300 μM. The results showed that irrigation termination significantly reduced the amounts of studied traits. Sodium nitroprusside foliar application increased the amounts of photosynthetic pigments, yield and grain yield components under drought stress and non-stress conditions. The highest and the lowest grain yield were obtained in the combination treatments of plant foliar application with 300 mM sodium nitroprusside and full irrigation (5129 kg/ha) and non-foliar application and irrigation interruption at the beginning silique stage (3396 kg/ha), respectively. The experiment indicated that sodium nitroprusside application can have positive effects on photosynthetic pigments, yield components and grain yield of rapeseed under drought stress and non-stress conditions, and therefore its application can greatly mitigate the adverse effects of drought stress in water deficit conditions.
Zeynab- Kobra Pishva; Majid Amini-Dehaghi; Amir Bostani; Amir-Mohammad Naji
Articles in Press, Accepted Manuscript, Available Online from 02 February 2021
Abstract
In order to study the effect of nitrogen fertilizer treatments on yield traits, essence percentage and the amount of nitrogen in the stem and leaves Cumin under different irrigation regimens, an experiment was conducted as split plot based on randomized complete block design with three replications in ...
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In order to study the effect of nitrogen fertilizer treatments on yield traits, essence percentage and the amount of nitrogen in the stem and leaves Cumin under different irrigation regimens, an experiment was conducted as split plot based on randomized complete block design with three replications in the 2016-2017 crop season at the Research Field of Agriculture Faculty, Shahed University, Tehran, Iran. In this experiment, the main plot consisted of different irrigation regimes at three levels (no stress, mild stress or irrigation based on draining 40% of available water and severe stress or irrigation based on draining 80% of available water) and Subplot included four levels of nitrogen fertilizer treatments (100% and 50% fertilizer recommendation of nitrogen (urea), seed stained biofertilizer application (Nitroxin) and combination treatment biofertilizer and 50% fertilizer recommendation nitrogen. The results showed that increasing deficit irrigation at a mild level and more than that at a severe level, although increased the percentage of essence, but its negative effect on yield and yield components, total chlorophyll, shoot nitrogen concentration and essence yield was significant. Application of combination nitrogen fertilizer (urea + Nitroxin) while increasing the yield and yield components of Cumin, increased the percentage and yield of essence, and shoot nitrogen concentration and generally caused the most desirable quantitative and qualitative yield of Cumin.
Seyedahmad Kalantarahmadi; Jahanfar Daneshian
Articles in Press, Accepted Manuscript, Available Online from 02 February 2021
Abstract
The experiment was carried out as a split plot based on randomized complete block design with 3 replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful during two years (2012-2014). The main plots were consisted of 3 sowing date levels (5th Nov, 25th Nov and ...
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The experiment was carried out as a split plot based on randomized complete block design with 3 replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful during two years (2012-2014). The main plots were consisted of 3 sowing date levels (5th Nov, 25th Nov and 15th Dec) and sub plots included 10 levels of foliar application (100, 200, 300 mg.lit-1 ascorbic acid, 100, 200, 300 μmol ascorbic acid, 10, 20, 30 vol% methanol and the foliar application of distilled water as control treatment). The effect of sowing date and foliar application as well as their interaction had significant effect on proline, soluble sugars, number of siliques per plant and seed yield (P≤0.01). Comparing the means of sowing date × foliar application showed that the maximum number of siliques per plant (68.96) was formed in the first sowing date and foliar application of ascorbic acid (300 mg.lit-1). There was a significant difference between different sowing dates and seed yield decreased in the second and third sowing date compared to the first one by 145 and 30%, respectively. However, foliar application of experimental treatments increased the seed yield in all sowing dates, but using of ascorbic acid (300 mg.lit-1) in the first and third sowing date as well as salicylic acid (200 µmol) and methanol (10%) in the second sowing date were recommended.
maryam habibi; faeze zaefarian; farhad rejali; nadali bagheri
Articles in Press, Accepted Manuscript, Available Online from 02 February 2021
Abstract
In order to investigate the effect of Arbuscular mycorrhizal fungi in Saffron rhizosphere on yield and nutrient uptake, a study was conducted as split plot factorial based a randomized completely design with three replications in the institute of Soil and Water research in Karaj, Treatment consisted: ...
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In order to investigate the effect of Arbuscular mycorrhizal fungi in Saffron rhizosphere on yield and nutrient uptake, a study was conducted as split plot factorial based a randomized completely design with three replications in the institute of Soil and Water research in Karaj, Treatment consisted: Irrigation regime as the main factor in three levels (such as complete irrigation as control, water interruption at the beginning of the growing season (mild restriction water) and water interruption at the beginning and mid of the growing season (severe restriction water)), sowing media in three levels (no organic fertilizer, vermicompost (20 ton ha-1) and biochar (10 ton ha-1) and Arbuscular mycorrhizal fungal in three levels (no application, strain a and strain b) as the sub factor. Based on the molecular findings, both strains isolated from saffron rhizosphere belonged to Rhizophagus irregularis. The results of this study showed that the highest fresh yield of flowers, phosphorus and potassium in the leaves with the amount of 7.76 g per pot, 1032.4.4 and 24876.8 mg kg-1, respectively, belonged to the complete irrigation × biochar × strain b treatment. Complete irrigation × vermicompost × strain b treatment had the highest percentage of nitrogen (1.757) in the leaves. The highest fresh and dried yield of stigma (0.358 and 0.062 gr per pot, respectively) was observed in complete irrigation × biochar treatment. Identification of native mycorrhizal fungi and its production as well as the use of organic fertilizers can play an important role in sustainable production of this plant.
Mehdi Rashtbari; Ali Akbar Safari Sinegani
Articles in Press, Accepted Manuscript, Available Online from 03 February 2021
Abstract
in the present study, the effect of various application methods of mostly applied antibiotics in agriculture (gentamicin, oxytetracycline, penicillin) at different concentration on root and shoot growth indices and number of rhizobial nodules of chickpea plant and the count of total bacteria, fungi and ...
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in the present study, the effect of various application methods of mostly applied antibiotics in agriculture (gentamicin, oxytetracycline, penicillin) at different concentration on root and shoot growth indices and number of rhizobial nodules of chickpea plant and the count of total bacteria, fungi and coliforms in soil around the plant root after a growth period of 60 days in greenhouse was evaluated as split-plot design. Application of antibiotics, even gentamicin, resulted to increase in plant shoot dry weight compared to control and the lowest weight by 0.98 g/pot observed in control treatment (without antibiotic). Root dry weight in penicillin applied treatments, specially at the higher concentration was the highest (1.1 g/pot) and was the lowest in gentamicin applied treatments, especially when applied as seed coating (0.48 g/pot). Totally, antibiotic application caused decrease in the root to shoot ratio compared to control. Application of all antibiotics increased soil bacterial count in the pots after 60 days in comparison with the control. Also, increasing the concentration of gentamicin and penicillin, decreased plant root nodule number by 78.8 and 59.7 percent, respectively. Application of antibiotics as seed coating had the highest negative impact on chickpea plant growth indices as well as rhizobial nodule numbers in plant root. Overall, the effect of antibiotics on soil microbial count and plant growth depends on antibiotic type and application method.
Mojdeh Sadat Khayat Moghadam; Ahmad Gholami; Amir Hossein Shirani rad; Mahdi BaradaranFiroozabadi; Hamid Abbasdokht
Articles in Press, Accepted Manuscript, Available Online from 03 February 2021
Abstract
In order to study the effects of late-season drought stress and foliar application of potassium silicate on yield and yield components of spring genotypes of canola, a factorial split-plot experiment was conducted in Karaj, Iran in a randomized complete block configuration with three replications for ...
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In order to study the effects of late-season drought stress and foliar application of potassium silicate on yield and yield components of spring genotypes of canola, a factorial split-plot experiment was conducted in Karaj, Iran in a randomized complete block configuration with three replications for two years of cultivation (2016-2018). The irrigation was performed at two levels in this study, including routine irrigation (control) and interruption of irrigation from the pod formation stage. Potassium silicate foliar application at two levels comprised of 0 and 4 g liter-1 in factorial status in main plots and five Brassica napus L. genotypes including OG×AL, RGS×SLM, DALGAN, RGS003 and RGS×Okapi in subplots. The results showed that the measured properties were affected by the applied treatments. Full irrigation with foliar application in OG×AL genotype resulted in highest seed yield (5620 Kg/ha) and total chlorophyll content (1.71 mg/g.FW) . increased stomatal resistance, leaf proline, leaf soluble carbohydrates and decreased total chlorophyll content and relative leaf water content. Under drought stress conditions, DALGAN and RGS × SLM genotypes had higher yield, which indicates its better performance under stress conditions. Finally, our research demonstrated Potassium Silicate's beneficial effects in improving the drought tolerance of canola plants, particularly at the end of the season. Our study will act as a foundation for attempting new approaches to mitigate drought damage and establish a functional connection between the position of potassium silicate, physiological response, and drought stress tolerance in canola plants.
Abbas Keshtehgar; Mahdi Dahmardeh; Behrooz Keshtegar; Ahmad Ghanbari; Issa Khammari
Articles in Press, Accepted Manuscript, Available Online from 03 February 2021
Abstract
To evaluate the production of mashhadi melon (Khatouni cultivar) under the different management of fertilizer levels and vermicompost bed, this study was conducted as a factorial experiment in the form of a randomized complete block design with three replications during the spring of 2020 crop year as ...
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To evaluate the production of mashhadi melon (Khatouni cultivar) under the different management of fertilizer levels and vermicompost bed, this study was conducted as a factorial experiment in the form of a randomized complete block design with three replications during the spring of 2020 crop year as two separate designs in Fariman and Zahak counties. Application of fertilizers in six levels include non-use of fertilizer (control), cow manure, sheep manure, nanobiomic foliar application, silicone foliar application, and complete application of chemical fertilizer as the first factor and four different levels of vermicompost include non-use of vermicompost (control), 5, 10 and 15 tons per hectare as the second factor. Results showed that the highest fruit yield, total titration, percentage of nitrogen, phosphorus, fruit potassium, and fruit flesh thickness in both Fariman and Zahak counties was obtained from nanobiomic foliar application under 15 tons per hectare of vermicompost. Also, the highest percentage of total soluble solids in Fariman county was observed jointly in the treatment of sheep manure and the treatment of chemical fertilizers and Zahak county in the treatment of non-use of fertilizer (control) under 10 tons per hectare of vermicompost. In Fariman county, the results of cow manure, sheep manure, nanobiomic, silicon, and chemical fertilizers at the levels of 10 tons and 15 tons per hectare of vermicompost did not show significant differences. Therefore, with less consumption of vermicompost, nanobiomic foliar application under 10 tons per hectare of vermicompost is recommended for melon cultivation in Fariman county.
reza fatemi devin; Seyed Mohammad Bagher Hoseini; hosani moghadam; Babak Motasharezadeh
Articles in Press, Accepted Manuscript, Available Online from 03 February 2021
Abstract
In order to investigate the effect(s) of biologic and organic fertilizers on light consumption efficiency in growing maize-bean mixture, an experiment was conducted in the form of split plots in a randomized complete block design with 12 treatments. Main plots containing different fertilizer systems ...
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In order to investigate the effect(s) of biologic and organic fertilizers on light consumption efficiency in growing maize-bean mixture, an experiment was conducted in the form of split plots in a randomized complete block design with 12 treatments. Main plots containing different fertilizer systems in four levels: including 30 kg / ha urea, Azotobacter, vermicompost, Azotobacter + vermicompost and subplots containing cultivation compound of pure maize and pure bean were 50% maize + 50% bean, + 60% maize + 60% pinto bean and 80% maize + 80% pinto bean. The results revealed that leaf area index, dry matter accumulation and light consumption efficiency of maize were significantly higher than pure culture. The highest light use efficiency was related to the combined use of Azotobacter and vermicompost in mixed culture of 80 % maize + 80% pinto beans with an average of 2.29 g / MJ, which increased the light use efficiency by 63% compared to 30 kg / ha of pure culture. Also, the highest dry matter related to the mixed culture of 60% maize + 60% pinto beans was obtained in the amount of 1728 g / m2, which increased the dry matter accumulation by 16% compared to pure culture. In general, the combined composition of organic and biologic fertilizers in intercropping has the ability to compete with urea chemical fertilizer in terms of mechanistic indicators of plant growth analysis.
Seyedeh nasrin Hosseini; Jalal Jalilian; esmaeil gholinezhad
Articles in Press, Accepted Manuscript, Available Online from 03 February 2021
Abstract
In order to investigate the effect of water deficit stress and stress modifiers on some morphological and physiological characteristics and yield of Quinoa, a pots factorial experiment based on a completely randomized design with 16 treatments and 6 replicates was done in 2019 at Urmia University. The ...
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In order to investigate the effect of water deficit stress and stress modifiers on some morphological and physiological characteristics and yield of Quinoa, a pots factorial experiment based on a completely randomized design with 16 treatments and 6 replicates was done in 2019 at Urmia University. The first factor includes water deficit stress at four levels, stress at the vegetative growth stage, stress at the reproductive growth stage, stress at seed filling stage and no stress (control). The second factor was foliar spraying of ascorbic acid, salicylic acid, nano-micronutrient chelate fertilizer and Control (water spray). Water deficit stress at different growth stages decreased plant height, a number of laterals, dry weight and fresh weight of vegetative organs, root volume, fresh and dry weight of root and root length compared to control. However, electrolyte leakage and leaf temperature increased. The results showed that water deficit stress at post-anthesis stage decreased grain yield via decreasing 1000-grain weight. Foliar application of growth regulators by improving yield components, increased the yield of quinoa under water deficit stress condition. Therefore, according to the results, it seems that the use of stress modulators in quinoa under water deficit stress with stimulating growth and metabolism, cause to tolorate water deficit stress.
Mohsen Seilsepour
Articles in Press, Accepted Manuscript, Available Online from 14 March 2021
Abstract
In order to investigate the effects of compost and nitrogen on the quantitative and qualitative characteristics of forage maize and some physical and chemical properties of soil, a factorial experiment with 9 treatments in a factorial randomized complete block design with RCFS was conducted. Natural ...
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In order to investigate the effects of compost and nitrogen on the quantitative and qualitative characteristics of forage maize and some physical and chemical properties of soil, a factorial experiment with 9 treatments in a factorial randomized complete block design with RCFS was conducted. Natural province of Tehran was conducted in 2014. Treatments included three levels of residual compost (0, 10 and 20 t ha-1) and three levels of nitrogen (0, 100 and 200 kg ha-1). The effect of municipal waste and nitrogen compost on yield and yield components was significant. The use of municipal solid waste compost significantly increased the electrical conductivity of soil, nitrate, iron, zinc uptake and significantly decreased soil reaction. Waste compost application also improved some of the soil physical properties including significant reduction in bulk density and increased field capacity and percentage of available soil water. Maximum dry forage yield of 21.44 ton / ha was obtained from application of 20 ton / ha municipal waste compost with 200 kg N/ha.
Mahdi Motaefi; Alireza Sirousmehr; Mohsen Mohsen Mousavi nik
Articles in Press, Accepted Manuscript, Available Online from 14 March 2021
Abstract
Drought stress is the most important factors in reducing crop yield, and, it is important to know the ways to cope with drought. This experiment was carried out to investigate the effect of organic growth Stimulator (Hamoon green) on yield and some physiological indices of safflower under drought stress ...
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Drought stress is the most important factors in reducing crop yield, and, it is important to know the ways to cope with drought. This experiment was carried out to investigate the effect of organic growth Stimulator (Hamoon green) on yield and some physiological indices of safflower under drought stress during the 2017-2018 in university of Zabol (Chahnime) as split plot based on RCBD with three replications. Experimental treatments included drought factor based on plant growth stages at three levels (complete irrigation throughout the growing season, irrigation up to terminal bud forms, irrigation up to completed flowering) and spraying factor of organic growth stimulator at 4 levels (pure water), foliar application was Hamoon green 1 liter in 10 liters + calcium, Hamoon green 1 liter in 20 liters + calcium and Hamoon green 1 liter in 30 liters + calcium. The results showed that drought reduced the height, 1000-seed weight and oil percentage by 44.41, 31.24 and 17.10%, respectively. Spraying hamoon green 1 liter in 10 liters + calcium caused an increase of 18.03, 13.90 and 13.74 percent of the above traits compared to the control. The highest grain yield (1885.55 kg.ha-1), chlorophyll a, b, total and carotenoids (3.49, 0.94, 2.74 and 5.34 mg.gr-1 fw, respectively), selenium content (5.18 mg.kg-1 fw) and seed calcium content (2.91%) were obtained from hamoon green 1 liter in 10 liter + calcium and complete irrigation treatment. In general, it seems that by spraying 1 liter per 10 liters of calcium, good performance can be achieved.
Asma Aslani; Mahroo Mojtabaie Zamani
Articles in Press, Accepted Manuscript, Available Online from 14 March 2021
Abstract
In order to investigate the possibility of reducing the negative effects of late-season heat stress using phosphate-solubilizing bacteria, this experiment was carried out as split factorial based on a complete randomized block design with three replications in Haftkel city, in growing season 2016-2017. ...
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In order to investigate the possibility of reducing the negative effects of late-season heat stress using phosphate-solubilizing bacteria, this experiment was carried out as split factorial based on a complete randomized block design with three replications in Haftkel city, in growing season 2016-2017. The main factor consisted of planting date in two levels and the sub factors as a factorial consisted of five bread wheat cultivars and of two levels application of phosphate solubilizing bacteria . The results showed that with delay in planting and occurrence of heat stress in grain filling period, grain yield, biological yield, harvest index and effective grain filling period decreased and grain filling rate increased and the reaction intensity varied depending on the cultivar. Mehregan cultivar had high yield in both planting dates and in the delayed planting date with the highest increase in grain filling rate and the lowest decrease in number of seeds per spike, had the highest grain yield and harvest index. By inoculating the seeds with bacteria, on both planting dates, the number of seeds per spike increased by 4.6%, grain yield by 7.6% and biological yield by 7%, but the effect of phosphate solubilizing bacteria on mitigating the effect of heat stress was not proven and the positive effect of bacteria was the same on both planting dates. Overall, higher ability to increase grain filling speed and maintain more grain number per spike were identified as two important traits for achieving higher grain yield under late-season heat stress conditions.
Azam Fatemi; payam moaveni; Jahanfar Daneshian; hamid mozaffari; Mehdi Ghaffari
Articles in Press, Accepted Manuscript, Available Online from 14 March 2021
Abstract
In order to investigate the effect of Magnesium nanoparticle spraying solution on some morphophysiological traits of sunflower under experimental drought conditions as split split plot in a randomized completely block design in three replicates at the field of oilseed section of seed and plant Improvement ...
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In order to investigate the effect of Magnesium nanoparticle spraying solution on some morphophysiological traits of sunflower under experimental drought conditions as split split plot in a randomized completely block design in three replicates at the field of oilseed section of seed and plant Improvement , during 2017-2019 growing season. The treatments including Drought stress at two levels: Normal irrigation and drought stress, Sunflower cultivars studied including: Farrokh, Shams , Qasem & Barzegar, and Magnesium nanoparticles application time at Three Levels: No spraying solution, Spraying at Flowering stage and Grain Filling stage. The results showed that drought stress reduced the amount of traits including: height, shoot dry weight, number of grains per head, 1000 grain weight, head diameter, grain yield, oil percentage and oil yield but Magnesium nanoparticle spraying solution improved the drought stress effect and increased morphological traits. Drought stress increased electrolyte leakage index and decreased relative water content of leaves by 13 and 9 percent, respectively. But magnesium nanoparticles decreased the content of electrolyte leakage index by 9 percent and increased relative leaf water content by10 percent. The response of cultivars to stress levels was not the same and in general, Barzegar, Shams, Qasem and Farrokh cultivars showed the highest tolerance to drought stress, that way, the highest grain yield and oil percentage being related to Barzegar cultivar by 3427.53 kg/h and 43.96 percent, respectively.
ahmad zare; maede malekpoor; maryam arabizadeh
Articles in Press, Accepted Manuscript, Available Online from 27 March 2021
Abstract
Regression models are a tool to quantify the weeds seed germination in response to temperature. In order to determinate the cardinal temperature of four weeds Brassicaceae family (Eruca sativa, Hirschfeldia incana, Sinapis arvensis and Erysimum repandum), four separate experiments were conducted with ...
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Regression models are a tool to quantify the weeds seed germination in response to temperature. In order to determinate the cardinal temperature of four weeds Brassicaceae family (Eruca sativa, Hirschfeldia incana, Sinapis arvensis and Erysimum repandum), four separate experiments were conducted with nine temperatures (5, 10, 15, 20, 25, 30, 35, 40 and 45°C) as factorial based on a complete randomized design (CRD) with three replications in Agricultural Science and Natural Resources University of Khuzestan in 2019. The First factor consisted of four weeds and the second factor included The Response of weeds to temperature were different, at 40°C only H. incana had germination (38%) and the germination of other weeds were completely inhibited. Based on the models used for E. sativa (Beta, five parameter), E. repandum (Beta, four parameter) S. arvensis and H. incana (Dent-like model), were the best models for determining cardinal temperature. The optimum temperature for germination of E. sativa and E. repandum was predicted 19.43 and 16.01 °C (Beta four and five parameter models) respectively, Also lower and upper optimum temperatures for germination of H. incana and Sinapis arvensis were achieved 27.22 , 29.26 and 23.23, 27.86 °C respectively (Dent-like model). The maximum emergence of Eruca sativa, Hirschfeldia incana, and Sinapis arvensis is expected in November and from December to February for Erysimum repandum. Modeling germination in response to temperature can be considered in weed management, especially in determining control time of weeds.
Siavash Heshmati; Gholam Akbari; Majid Amini Dehaghi; Kayvan Fathi Amirkhiz; Keyvan Maleki
Articles in Press, Accepted Manuscript, Available Online from 28 March 2021
Abstract
In order to study the foliar application of melatonin on plants grown from safflower in different seed quality under drought condition, two field experiments were carried out at research farm of Aburaihan Campus, University of Tehran in 2017 and 2018 growing seasons. The experimental design was split-factorial ...
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In order to study the foliar application of melatonin on plants grown from safflower in different seed quality under drought condition, two field experiments were carried out at research farm of Aburaihan Campus, University of Tehran in 2017 and 2018 growing seasons. The experimental design was split-factorial in a randomized complete block design with four replicates. The treatments consisted of two levels of drought stress (1- normal irrigation (no-stress) and 2- irrigation after reaching 85% of soil moisture depletion of field capacity at flowering stage (drought stress)) were randomized to the main plots. Subplots were 4 treatments in number and consisted of a factorial combination of seed quality (stored seed and recently harvested seeds) and foliar application (1-control and, 2- melatonin foliar application). The results illustrated that the SOD and CAT activity were increased in response to melatonin in plants grown from recently harvested seeds under drought condition. Furthermore, it indicated that foliar application of melatonin decreased the amount of leaf soluble proteins by 28 % in plants grown from recently harvested seeds under drought condition. The results showed that the amount of malondialdehyde decreased by 37% in plants grown from recently harvested seeds by foliar application of melatonin under drought condition. It seems that the seed quality has a great influence on grown plants and, also using melatonin may play a substantial role in ameliorating the injuries derived from stress on safflower plant.
Reza Sadeghi; Mohammad Reza Eshrati; Seyed Mohammad Mahdi Mortazavian; Arsalan Jamshidnia; Asgar Ebadollahi
Articles in Press, Accepted Manuscript, Available Online from 02 April 2021
Abstract
Pink stem borer, Sesamia cretica Led., is one of the most important pests of sugarcane and maize in Iran. Insecticidal properties of essential oils of four cumin ecotypes, including Fars-Sivand (FS), North Khorasan-Shirvan (KS), Kerman-Kuhbanan (KK), and Kerman-Rafsanjan (KR), was evaluated ...
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Pink stem borer, Sesamia cretica Led., is one of the most important pests of sugarcane and maize in Iran. Insecticidal properties of essential oils of four cumin ecotypes, including Fars-Sivand (FS), North Khorasan-Shirvan (KS), Kerman-Kuhbanan (KK), and Kerman-Rafsanjan (KR), was evaluated against 4th instar-larvae of S. cretica in a completely randomized design with four replications. Larval mortality at 27±2 °C, 65±5% relative humidity, and 16: 8 hours light: darkness' period was recorded after 72 hours. The results showed that all cumin ecotypes were toxic to the pest. The lowest LC50 value was recorded for the essential oil of KR ecotype (2725 ppm) followed by KK, FS, and KS ecotypes (2777, 3099, and 8390 ppm, respectively). The chemical analysis of essential oils tested by GC-MS showed that m-cymene in the KR ecotype was higher than other cumin ecotypes. Therefore, the high toxicity of the KS ecotype than the other cumin ecotypes can be related to the presence of such compounds. According to the results of the present study, the essential oils of cumin ecotypes have great potential for replacement with chemical insecticides in the integrated management of S. cretica.
Saeid Naservafaei; Yousef Sohrabi; Parviz Moradi
Articles in Press, Accepted Manuscript, Available Online from 02 April 2021
Abstract
This study was conducted to investigate the effect of Brassinosteroid on some physiological traits, yield components and grain yield and oil of Dragon’s head under deficit irrigation conditions. The experiment was conducted as split-plot based on a randomized complete block design with three replications ...
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This study was conducted to investigate the effect of Brassinosteroid on some physiological traits, yield components and grain yield and oil of Dragon’s head under deficit irrigation conditions. The experiment was conducted as split-plot based on a randomized complete block design with three replications during 2016-2017 and 2017-2018 in the research farm of Agricultural Research and Training Center and Natural Resources of Zanjan province. Experimental treatments include deficit irrigation (normal or control irrigation, irrigation cut-off from the beginning of flowering to the end of maturity, irrigation cut-off from the beginning of branching (emergence of the sixth pair of main stem leaves to physiological maturity) in main and foliar spraying with Brassinosteroid with concentrations of 0.5, 1.5, 1.5 μM and control were applied in sub plots. The results showed that irrigation cut-off from the beginning of branching caused a decrease in total chlorophyll content (42.8%), number of capsules per plant (62.7%), number of grain per plant (66.1%), 1000-seed weight (22.3%), biological and seed yield (62.1%), harvest index (30.8%) and oil yield (75.1%). Foliar application with Brassinosteroids only significantly increased the leaf total chlorophyll concentration and grain oil percentage under different levels of irrigation cut-off stress. There was statistically significant difference between foliar application levels with Brassinosteroids for leaf total chlorophyll concentration and seed oil percentage traits. There is a need for complementary researches to prove the effectiveness of foliar application with this growth regulator to improve growth and yield of Dragon’s head under deficit irrigation conditions.
Mohammad Yazdandoost Hamedani; Mokhtar Ghobadi; Mohammad Eghbal ghobadi; Saeid Jalali Honarmand; mohsen saeidi
Articles in Press, Accepted Manuscript, Available Online from 07 April 2021
Abstract
In order to evaluate the effect of foliar application of some chemicals on antioxidant enzymes activity and chlorophyll fluorescence of sunflower in different irrigation conditions and to identify compounds effective in reducing the adverse effects of drought stress, this experiment was conducted at ...
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In order to evaluate the effect of foliar application of some chemicals on antioxidant enzymes activity and chlorophyll fluorescence of sunflower in different irrigation conditions and to identify compounds effective in reducing the adverse effects of drought stress, this experiment was conducted at the Agricultural Research Center of Hamedan, Iran, during two years (2015-16). Three irrigation and six foliar application treatments were evaluated in a split plot experiment based on randomized complete block design with three replications. Irrigation treatments consisted of 60, 80 and 100% plant water requirement and foliar application treatments included: abscisic acid 40 M, Selenium 20 mg/L, Salicylic acid 500 M, SNP 100 μM, Glycine betaine 100 mM and control. The results showed that with irrigation water decreasing, the activity of superoxide dismutase, peroxidase and catalase enzymes increased significantly, while the maximum photochemical efficiency of photosystem II and grain yield decreased. The interaction effect of irrigation × foliar application on the activity of antioxidant enzymes and grain yield was significant and on chlorophyll fluorescence was not significant. In deficit irrigation treatments, foliar application of all chemical compounds significantly increased the activity of antioxidant enzymes compared to control treatment. Application of salicylic acid increased the maximum photochemical efficiency of photosystem II and grain yield, at all irrigation conditions. Under 60, 80 and 100% irrigation conditions, salicylic acid application increased grain yield by 24.3, 10.1 and 4.9% respectively.
Majid Gholamhoseini; farhad habibzadeh; parisa hemmati
Articles in Press, Accepted Manuscript, Available Online from 07 April 2021
Abstract
In dry region, root systems play a major role in controlling plant growth and yield due to their importance in absorption of water. In order to investigate the effect of irrigation regimes on root and shoot traits of sesame (Sesamum indicum L.) genotypes, a field experiment was conducted in Karaj (Seed ...
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In dry region, root systems play a major role in controlling plant growth and yield due to their importance in absorption of water. In order to investigate the effect of irrigation regimes on root and shoot traits of sesame (Sesamum indicum L.) genotypes, a field experiment was conducted in Karaj (Seed and Plant Improvement Institute) during 2017 and 2018. A factorial experiment was laid out in completely randomized design with four replications. The results showed that there were significant differences between genotypes and irrigation regimes for root and shoot traits. In all genotypes, root length density was higher in full irrigation treatment and in the upper soil layer (depth 0 to 30 cm) compared to stress treatment. In addition, under drought stress conditions root depth increased (averagely 30 %) in all genotypes. In contrast, root dry weight decreased in Dashtestan 2 (15 %), Darab 1 (16 %), and Naz (22 %) and increased in Oltan (1 %), USA-ns 96 (7 %) and Sodan 94 (10 %) genotypes. On the other hand, the highest amount of shoot dry weight was observed in the USA-ns 96 genotype (39 g) and the lowest in the Naz cultivar (22 g). Finally, results showed that USA-ns 96 genotype, which was superior in terms of root characteristics such as root depth and root length density compared to other genotypes, in addition to having more shoot dry weight, showed the least dry weight loss under stress conditions.
Rahim Naseri; Amir Mirzaei; Amin Abbasi
Articles in Press, Accepted Manuscript, Available Online from 07 April 2021
Abstract
in order to investigate the effect of inoculation with mycorrhizl fungi on the grain yield and gas exchange of barley cultivars in rainfed conditions, a field experiment was carried out in factorial arrangment using randomized complete block design with three replications at the farm station of Sarablah ...
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in order to investigate the effect of inoculation with mycorrhizl fungi on the grain yield and gas exchange of barley cultivars in rainfed conditions, a field experiment was carried out in factorial arrangment using randomized complete block design with three replications at the farm station of Sarablah Agricultural Research Center during 2019-2020 cropping season. Experimental treatments including factor of barley cultivars (Mahali, Mahoor, Khoram and Fardan) and fertilizer sources treatment including: control (without fertilizer source), 50% P fertilizer, mycorrhizal fungus (Glomus mosseae, Glomus etunicatum and Rhizophagus irregularis), mycorrhizal fungi + 50% P chemical fertilizer and 100% P chemical fertilizer. The results of this study showed that the interaction effect of cultivar ×fertilizer sources were significant on dry matter remobilization efficiency from spike, Contribution of spike reserves to grain yield, dry matter remobilization efficiency from stem, contribution of stem reserves to grain yield, current photosynthesis rate, contribution of current photosynthesis and grain filling rate. So that the interaction betwen Fardan cultivar× mycorrhizal fungi + 50% P chemical fertilizer had the highest dry matter remobilization effeciency from spike, contribution of spike reserves to grain yield, current photosynthesis rate, contribution of current photosynthesis and grain filling rate. In this study, the highest dry matter remobilization effeciency from stem, contribution of stem reserves to grain yield was obtained from the interaction of Mahali cultivar×control treatment.
Ebadollah Baniani; Mousaalreza vafaeitabar; Morteza Arab Salmani; Saeed Boorboor; Farzad Karimi; Mohammad Saeidi; Akram Mohajer abbasi; Nader Gharib
Articles in Press, Accepted Manuscript, Available Online from 08 April 2021
Abstract
In order to some new cotton genotypes and cultivars value of cultivation and use (VCU) trial conducted at Tehran province agriculture and natural resources education center in Varamin during 2016 and 2017. Evaluated cotton genotypes and cultivars were 1- Varamin(control), 2-Khordad(control), 3-Ulran(commercial ...
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In order to some new cotton genotypes and cultivars value of cultivation and use (VCU) trial conducted at Tehran province agriculture and natural resources education center in Varamin during 2016 and 2017. Evaluated cotton genotypes and cultivars were 1- Varamin(control), 2-Khordad(control), 3-Ulran(commercial cultivar), 4- 43259, 5- A-SJ2×349, 6- R7, 7- no. 210, 8- no. 221, 9-Leon(foreign commercial cultivar) and Sajedi(new cultivar). Measured traits were 1- plant height, 2- sympodial branches number, 3-monopodial branches number, 4- main stem nodes number, 5- boll number, 6-boll weight, 7- earliness, 8-seed cotton yield, 9- lint percent, 10- fiber length, 11- fiber fitness, 12, fiber strength and 13-fiber elasticity. Results revealed Sajedi new cultivar for the purposes of most of related to cotton value of cultivation traits higher than control cultivars or as far as those cultivars. Also, sajedi new cultivar because in comparisons of other studied genotypes and cultivars had the most boll number and weight and seed cotton yield higher than or as far as having the most seed cotton yield control cultivar and was the earliest maturity studied genotypes and cultivars during two years and had the highest lint percent and fiber elasticity in first year, Sajedi new cultivar is introducible and commercializable cultivar for cultivation in similar to Vatamin regions in Tehran province.
Abdollah Hasanzadeh Gorttapeh; Saeid Heydarzadeh; Amir Rahimi
Articles in Press, Accepted Manuscript, Available Online from 08 April 2021
Abstract
Amaranthus is one of the forage plants resistant to environmental stresses. This experiment conducted 2 years in form of a complete random block design based on factorial a with three replications, 3 levels of irrigation (irrigation after depleting 40, 60 and 75% of available water) as the first factor ...
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Amaranthus is one of the forage plants resistant to environmental stresses. This experiment conducted 2 years in form of a complete random block design based on factorial a with three replications, 3 levels of irrigation (irrigation after depleting 40, 60 and 75% of available water) as the first factor and organic (cow manure and phosphate-2), chemical (phosphorus and nitrogen), integrated and control (no fertilizer) fertilizer systems including was the second factor. The results of this study showed that crude protein, digestibility of dry matter, water-soluble carbohydrates, digestible nutrients, relative nutritional value and specific energy of lactation, due to the application of different fertilizer systems in each irrigation level were improved compared to of non-consumption of fertilizer. The performance of biomass and forage protein were increased by 38.89 and 54.37%, 30.60 and 41.23% and 22.20 and 34.92% in optimal, moderate and severe stress conditions respectively in integrated fertilizer system than the control treatment. The results of this study showed the use of organic fertilizers alone or combined with chemical fertilizers improved quantitative and qualitative traits of amaranthus forage irrigation after depleting 40 and 60% of available water. So, optimal use of biological inputs for sustainable agriculture and reduction of pollution caused by the use of chemical fertilizers is recommended.
alireza khodashenas
Articles in Press, Accepted Manuscript, Available Online from 27 April 2021
Abstract
In order to evaluation of grain yield of wheat cultivars in two planting dates and determination of proper cultivars for autumn and entezari culture, a study was carried out during two years 2015-2017 in Torogh research station in Mashhad. Tow planting dates of autumn and entezari culture were main plot ...
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In order to evaluation of grain yield of wheat cultivars in two planting dates and determination of proper cultivars for autumn and entezari culture, a study was carried out during two years 2015-2017 in Torogh research station in Mashhad. Tow planting dates of autumn and entezari culture were main plot and 16 genotypes of wheat (14 cultivars and 2 promising lines) and include of Baran, Rasad, Sardari, Sabalan, Crosssabalan, Rijav, Karim, Koohdasht, Dehdasht, Azar2, Homa, Ohadi, Ghaboos and Aftab cultivars were subplot. Results showed that significant difference exist between cultivars in terms of agronomic characteristics and grain yield. Flowering date of cultivars was different and none of cultivars didn’t start flowering in the optimum temperature range for flowering. Cultivars of Karim and Rijav with mean yield of 1430 and 1326 kg/ha, respectively had the maximum yield and cultivars of Ohadi and Rasad with mean yield of 893 and 925 kg/ha, respectively had the minimum yield, the difference between maximum and minimum grain yield was about 60%. Delay in planting leads to delay in pollination in all cultivars, therefore autumn planting date could be recommendable. Also for autumn planting, cultivars of Karim and Rijav can be advised and for entezari planting date only spring cultivars such as Karim and Aftab are recommended.
Atefeh Sadat Mousavi; Masoumeh Naeemi; ali Rahemi karizaki; Abdolatif Gholizadeh
Articles in Press, Accepted Manuscript, Available Online from 27 April 2021
Abstract
In order to investigate the effect of chitosan and salicylic acid elicitors on osmotic adjustment and some physiological traits of Hyssop under experimental drought conditions, in a split plot design with randomized complete block design with Three replications at research farm of Gonbad Kavous University ...
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In order to investigate the effect of chitosan and salicylic acid elicitors on osmotic adjustment and some physiological traits of Hyssop under experimental drought conditions, in a split plot design with randomized complete block design with Three replications at research farm of Gonbad Kavous University during 2018-2019. Irrigation factor at three levels including seven, 14 and 21 days’ irrigation interval as main factor and four levels of spraying including no elicitor (control treatment, spraying), salicylic acid (300 mg. l-1), Chitosan spraying (5 g. l-1) and the combination of salicylic acid and chitosan were considered as auxiliary agents. Results of analysis of variance showed that the interaction between spraying and irrigation had significant effects on ion leakage, chlorophyll a content, soluble sugar and malondialdehyde content but was insignificant on carotenoid and essential oil yield. spraying of salicylic acid and with 17% reduction in ion leakage and 40% reduction in plant malondialdehyde compared to the control increased the stability of cell membranes under 21-day irrigation stress. In the same treatment, chitosan increased the amount of photosynthetic pigments and total chlorophyll by 51% compared to the control. According to the results, salicylic acid and Chitosan were able to increase the ability of hyssop in response to water deficit stress by activating different tolerance mechanisms.
Seyed Basir Mousavi; Saeed Sayfzade; Hamid Jabbari; alireza valadabadi; Esmaeil Hadidi Masouleh
Articles in Press, Accepted Manuscript, Available Online from 29 April 2021
Abstract
This study was conducted to evaluate the effect of auxin foliar application in two safflower cultivars under drought stress condition using a factorial split plot experiment with randomized complete block design in two years (2017-2018 and 2018-2019). This experiment evaluated irrigation at two levels ...
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This study was conducted to evaluate the effect of auxin foliar application in two safflower cultivars under drought stress condition using a factorial split plot experiment with randomized complete block design in two years (2017-2018 and 2018-2019). This experiment evaluated irrigation at two levels including normal irrigation and interruption of irrigation from the beginning of grain filling stage (drought) in the main plots and cultivars of Padideh and Goldasht and auxin foliar application in two levels of non-foliar application of distilled water (control) and foliar application of auxin (indole acetic acid) in one step (mid-flowering) at a concentration of 3000 mg.l-1 were assigned in sub-plots as a factorial. In the auxin foliar application and non-foliar application (control) in both normal irrigation and drought stress treatments, the highest total number of heads per plant in Goldasht cultivar were 26.3 and 24.3 respectively, and the highest grain number per plant observed in Goldasht cultivar were at 708 and 592, respectively. Auxin foliar application and irrigation had no significant effect on the grain oil percentage. Goldasht cultivar had a higher grain yield compared to Padideh cultivar due to lower head temperature, higher soluble carbohydrate concentration, number of heads and 1000-grain weight. Generally, results showed that the effect of the studied treatments was affected by the year and despite the positive effect of auxin foliar application on some yield components at both irrigation levels, foliar application of auxin at middle of flowering stage had no significant effect on grain yield.
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