Mahdi Kaykhazaleh; Mahmood Ramroudi; Mohammad Galavi; َAhmad Ghanbari; Hamid Reza Fanay
Abstract
An experiment has been conducted in the form of split plots in a randomized complete block design with three replications at the Agricultural and Natural Resources Research Institute in Zahak to evaluate the effect of drought stress and potassium application on yield and morphophysiological traits of ...
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An experiment has been conducted in the form of split plots in a randomized complete block design with three replications at the Agricultural and Natural Resources Research Institute in Zahak to evaluate the effect of drought stress and potassium application on yield and morphophysiological traits of safflower (Goldasht cultivar) under saline irrigation conditions (EC 6 dS.m-1) in 2018-2019. Drought stress irrigation regimes have been tested at three levels (irrigation after 45% (control), 65%, and 85% of admissible moisture depletion) as the main factor, and potassium fertilizer at four levels (0, 75, 150, and 225 kg.ha-1) as the sub factor. According to the findings, drought stress has reduced plant height, number of heads per plant, number of seeds per head, seed and biological yield, and relative water content. The use of potassium, on the other hand, has increased the above traits greatly. Irrigation after 45% moisture depletion increases seed yield by 42.32%, compared to irrigation after 85% moisture depletion. Interaction of drought stress and potassium has had a significant effect on number of branches per plant, 1000-seed weight, leaf chlorophyll index, soluble carbohydrate content, and seed oil percentage, with the highest amount observed after 45% water drainage and application of 225 kg K ha-1.
Seyedahmad Kalantarahmadi; Jahanfar Daneshian; Habib Mobinirad
Abstract
In order to develop winter cultivation and improve crop rotation in the region, an experiment has been conducted to evaluate the effects of sowing date on sunflower cultivars seed yield. It is a split-plot based on completed randomized blocks design with four replications in Safiabad Agricultural and ...
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In order to develop winter cultivation and improve crop rotation in the region, an experiment has been conducted to evaluate the effects of sowing date on sunflower cultivars seed yield. It is a split-plot based on completed randomized blocks design with four replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful and has taken place during two years (2015-2016). The main plots are consisted of four sowing date levels (23rd Jan, 6th Feb, 20th Feb, and 6th Mar), while the sub plots include nine levels of cultivars (Azargol, Armavirski, Barzegar, Progress, Record, Shams, Farokh, Ghasem, and Gabor). Delay in the sowing date has decreased growth period length and plant height, with the greatest number of seeds per capitulum (684.17) belonging to record cultivar on the first sowing date in the first year and the maximum one (767.47) occurring again to this cultivar on the third sowing date in the second year. The maximum seed yield in the first (3850 kg.ha-1) and second (4088 kg.ha-1) year belong to the first sowing date (23rd Jan) and Azargol cultivar. Based on the results, Azargol cultivar have had the lowest rank, being considered as the cultivar with the highest seed yield on all sowing dates, followed by Record and Armavirski, in the second and third placed, respectively. In terms of stability, considering that Farrokh cultivar also has had the lowest standard deviation, it has been selected as the most stable cultivar.
Ghobad Mohamadpoor; salim farzaneh; SAEID KHOMARI; Raouf Seyed sharif; behrooz esmaie;pour
Abstract
This study attempts to investigate the effect of application of humic acid and seaweed extract on morphology, growth, yield, and yield components of quinoa under drought stress in 2018-2019 in two different locations, Qasr Shirin and Dalahou. It has been performed as split plots in a randomized complete ...
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This study attempts to investigate the effect of application of humic acid and seaweed extract on morphology, growth, yield, and yield components of quinoa under drought stress in 2018-2019 in two different locations, Qasr Shirin and Dalahou. It has been performed as split plots in a randomized complete block design with 4 replications. Experimental treatments include three irrigation treatments (full irrigation, irrigation cut-off at the beginning of flowering and irrigation cut-off at the beginning of seed filling) and foliar spraying treatments with different amounts of humic acid (foliar application at the rate of 1.5 kg / ha and 2 Kg / ha) and seaweed extract (foliar application at 1 kg / ha and 1.5 kg / ha) along with a control treatment. Results show that seed yield in Dalahou region under normal condation has been 24.78% higher than Qasrshirin region. Seed yield in different irrigation treatments under the influence of foliar application show that in all irrigation treatments, the effect of foliar application of humic acid and seaweed extract on seed yield has been positive compared to the control. In full irrigation conditions, the highest seed yield is obtained from foliar application of humic acid, while in irrigation cut-off treatments, the effect of seaweed extract on seed yield has been better than humic acid. The weight of 1000 seeds in quinoa produced in Dalahu region has been more than Qasrshirin region but in both regions drought stress has reduced the 1000 seeds weight. In all irrigation treatments, application of humic acid and algae extract has increased 1000-seed weight.
Ghorban Khodabin; Mojdeh Sadat Khayat Moghadam; Shahryar kazemi; mahsa rafati alashti
Abstract
This study investigates the effects of different tillage systems (no-tillage, minimum and conventional), fertilizers (no fertilizer, vermicompost (V), urea (U) and combined urea and vermicompost (VU) and irrigation regimes on various quantitative and qualitative traits of rapeseed, as well as soil nitrate ...
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This study investigates the effects of different tillage systems (no-tillage, minimum and conventional), fertilizers (no fertilizer, vermicompost (V), urea (U) and combined urea and vermicompost (VU) and irrigation regimes on various quantitative and qualitative traits of rapeseed, as well as soil nitrate leaching (NL). Field trials have been conducted between 2017 and 2019 in the Research Institute of Forests and Rangelands with no significant difference observed for seed and oil yield between the minimum and conventional till systems. However, the no-till system vs. minimum and conventional till decrease these traits by 22% and 21.5%. The combined application of vermicompost and urea under optimal irrigation conditions boosts oil yield by 24%, compared to the control) of rapeseed. Furthermore, across all tillage types, the highest NL is observed where urea was applied. When compared with urea, V and UV treatments decrease the NL by 67% and 50% in no-till plots, 50% and 36% in minimum till plots, and 49% and 34% in conventional till plots, respectively. Deficit irrigation also reduces linoleic acid by 7.6%. In addition, the highest levels of oleic acid (63.9%) and linoleic acid (20.7%) are observed under residual tillage system with combined fertilizer application and the residual tillage system with vermicompost application, respectively The findings indicate that minimum till in combination with VU treatments supports reduced NL over conventional till and urea fertilization practices, while improving rapeseed quantitative and qualitative traits.
Fazileh Dahie-Zehi; Mahmood Ramroudi; Abdolshakor Raissi
Abstract
In order to investigate the effect of drought stress on some morphological traits, yield, yield components, and oil percentage of sesame genotypes, an experiment has been conducted in form of split plots in a randomized complete block design with three replications during 2018 at the Research Farm of ...
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In order to investigate the effect of drought stress on some morphological traits, yield, yield components, and oil percentage of sesame genotypes, an experiment has been conducted in form of split plots in a randomized complete block design with three replications during 2018 at the Research Farm of Velayat University, Iranshahr. Drought stress factor includes normal irrigation (based on 100 mm evaporation from Class A evaporation pan) and drought stress (based on 200 mm evaporation from Class A evaporation pan) as the main factor, while sesame cultivars, including Dashtestan 2 and 5, Yelovait, Jiroft13, Iandraces of Dom Siah, and Darab1 have been the subfactor. Results show that drought stress significantly reduces plant height, number of branch and capsule per plant, number of seed per capsule and seed, biological yield, and oil yield and percentage. The increase in seed yield under normal irrigation conditions has been 28.67%, compared to drought stress conditions. Among all cultivars, Darab-1 has had the highest seed and oil yield in comparison with other cultivars under both irrigation conditions; therefore, this cultivar will be suitable for cultivation in Iranshahr. The correlation results show that seed yield has had a positive and significant correlation with the number of capsules per plant, number of seed per capsule, biological yield, and 1000-seed weight, with the highest correlation being related to seed and oil yield.
omid Lotfifar; samaneh Mottaghi
Abstract
The purpose of this study is to use meta-analysis to combine the results of experiments conducted in Iran on the effect of drought stress due to irrigation cessation at different stages of development, on yield and yield components of canola. The studied traits include grain yield, oil and dry matter, ...
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The purpose of this study is to use meta-analysis to combine the results of experiments conducted in Iran on the effect of drought stress due to irrigation cessation at different stages of development, on yield and yield components of canola. The studied traits include grain yield, oil and dry matter, number of pods per plant, number of seeds per pod, 1000-seed weight, and grain oil content. Results show that all traits under the influence of stress at different stages of development are significantly affected by drought stress. Irrigation interruption in different stages on average cuts grain yield by 34.5%, oil yield by 36%, oil content by 4.7%, dry matter by 25.8%, number of pods by 35.4%, seeds per pod ratio by 18.5%, and 1000-seed weight by 17.5%, while raising the proline content by 49.9%. The highest reduction rate in grain and oil yield belongs to the irrigation cut-off treatment, in turn leading to a reduction of 41% and 46% of these two traits, respectively. Also, regarding the yield components, the highest reduction in the number of pods per plant, number of seeds per pod, and 1000-seed weight is observed in the cut-off treatments of stem, flowering, and podding, respectively.
Hassan Akhgari; Behzad Kaviani
Abstract
An experiment as factorial with completely randomized block design with four replications during two continuous years (2019-2020) was carried out in order to evaluate the efficiency of rice (Oryza sativa L.) by seed tape technology and its comparison with transplanting and traditional direct seeding ...
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An experiment as factorial with completely randomized block design with four replications during two continuous years (2019-2020) was carried out in order to evaluate the efficiency of rice (Oryza sativa L.) by seed tape technology and its comparison with transplanting and traditional direct seeding cultivations. The first factor consisted of two rice cultivars (Khazar and Hashemi) and the second one consisted of ten levels of seed priming treatment with three methods (transplanting, traditional direct and direct with seed tape technology). The two main challenges of rice production in traditional transplanting and direct seeded methods are the high share of labor and the increased cost. Therefore, new methods of cultivation should be sought to reduce the cost of rice production. In the present study, direct seeded of rice with seed priming treatments and seed tape technology, with reduction of labor and cost is presented. Agronomy parameters and cost production factors were evaluated in these three methods. The results showed that the use of direct seeded method with seed tape technology increased rice yield by eight percent and saved 25 percent in cost, as well as a 11 percent reduction during the growing period, 30 percent in the number of labor per hectare, 26 percent in the production cost per kilogram of white rice and 2.2 percent in the cost-benefit index in Hashemi cultivar compared to the cultivation method. Therefore, direct seeded with seed tape technology, done for the first time in Iran, is effective in reducing the cost of rice production.
Siavash Heshmati; Gholam Akbari; elias soltani; Majid Amini Dehaghi; Kayvan Fathi Amirkhiz; Keyvan Maleki
Abstract
In order to study the foliar application of melatonin on plants grown from safflower in different seed qualities under drought condition, two field experiments have been carried out at research farm of Aburaihan Campus, University of Tehran, between 2017 and 2018 growing seasons. The experimental design ...
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In order to study the foliar application of melatonin on plants grown from safflower in different seed qualities under drought condition, two field experiments have been carried out at research farm of Aburaihan Campus, University of Tehran, between 2017 and 2018 growing seasons. The experimental design is split-factorial in a randomized complete block design with four replicates, with the treatments being 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)), in the main plots. The subplots include 4 treatments, including a factorial combination of seed quality (stored seed and recently harvested seeds) and foliar application (the control and melatonin foliar application). Results from these experiments illustrate that melatonin foliar application has significantly increased the seed yield of stored seed by 589Kg.ha-1, compared to the control. It is also shown that SOD and CAT activities have been increased in response to melatonin in plants grown from recently-harvested seeds under drought condition. Furthermore, it is indicated that foliar application of melatonin decrease the amount of leaf soluble proteins by 28% in plants grown from recently-harvested seeds under drought conditions. According to the results, the amount of malondialdehyde is decreased by 37% in plants grown from recently-harvested seeds by foliar application of melatonin under drought conditions. It seems that seed quality has an enormous influence on grown plants and that using melatonin may play a substantial role in ameliorating the injuries derived from stress on safflower plant.
Jahanfar Daneshian; Farnaz Sahriati; NADIA SAFAVI FARD; Abdollah Hassani
Abstract
The effect of water deficit stress has been evaluated on oil quality and yield of 11 sunflower hybrids in Karaj during 2012 and 2013. Three separate experiments have been carried out as the base of randomized complete block design with three replications to apply water deficit stress treatments. Irrigation ...
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The effect of water deficit stress has been evaluated on oil quality and yield of 11 sunflower hybrids in Karaj during 2012 and 2013. Three separate experiments have been 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 are performed on the base of 60, 120, and 180 mm evaporation from Class A evaporation pan, respectively. Results show that seed yield has decreased about 18% and 33% in mild and sever water deficit stresses, respectively. Yield and oil percentage are affected by hybrids and the interaction of year and stress. Barzegar hybrid, with an average of 2846 kg/ha, has had the highest grain yield. It is also in the top group with 43.65% oil. Yield and seed oil percentage are affected by environmental conditions of years, while water deficict stress has no significant effect on oleic and linoleic acids. However, there is a strong negative correlation between oleic and linoleic acids. Hysun 25 and Sirena cultivars are suitable for oil production with higher oleic acid and Barzegar and G6×R-43 are suitable for oil production with higher linoleic acid.
Seyedahmad Kalantarahmadi; Jahanfar Daneshian
Abstract
The present experiment has been carried out as a split plot based on randomized complete block design with three replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful between 2012 and 2014. The main plots is consisted of 3 sowing dates (November 5, November ...
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The present experiment has been carried out as a split plot based on randomized complete block design with three replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful between 2012 and 2014. The main plots is consisted of 3 sowing dates (November 5, November 25, and December 15) with the sub plots including 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 has had significant effect on proline, soluble sugars, number of siliques per plant, and seed yield (P≤0.01). Comparing means of sowing date × foliar application shows that the maximum number of siliques per plant (68.96) has been formed in the first sowing date with the foliar application of ascorbic acid (300 mg.lit-1). There has been a significant difference between different sowing dates: the seed yield has decreased in the second and third sowing date, compared to the first one by 145% and 30%, respectively. However, foliar application of experimental treatments has increased the seed yield in all sowing dates, but it is recommended to use ascorbic acid (300 mg.lit-1) in the first and third sowing dates as well as salicylic acid (200 µmol) and methanol (10%) in the second sowing date.
Benjamin Torabi; Najebullah Ebrahimi; Afshin Soltani; Ebrahim Zeinali
Abstract
The present study was conducted to parameterize the SSM_iCrop model and evaluate the prediction of growth and development of faba bean in Gorgan climate condition. This study was carried out on faba bean cv."Barkat" as split-plot in randomized complete block design with four replications at Gorgan University ...
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The present study was conducted to parameterize the SSM_iCrop model and evaluate the prediction of growth and development of faba bean in Gorgan climate condition. This study was carried out on faba bean cv."Barkat" as split-plot in randomized complete block design with four replications at Gorgan University of Agricultural Sciences and Natural Resources in 2015-2016. The experimental factors consisted of planting date (27 November, 25 December and 31 January) and plant density (5, 15, 25 and 35 plants/m2). The parameters of phonological stages, leaf expansion and senescence, production and distribution of dry matter and water balance were estimated using the present data experiment and other data. The results of model evaluation showed that, it can well predict, days to flowering (RMSE = 3.8 and CV =4.1), days to maturity (RMSE = 11.9 and CV= 8.1), node number on main stem (RMSE = 1.7 and CV = 10.0), leaf area index (RMSE =0.8 CV =28.8), biological yield (RMSE = 158.5 and CV =21.6) and seed yield (RMSE = 118.6 and CV = 24.7). Therefore, the SSM_iCrop model can be used to evaluate the agronomic management and analyze the growth and yield of faba bean in Gorgan conditions.
shadi moradi; jalal khorshidi; mohammadreza morshedloo
Abstract
Foeniculum vulgare Mill. is one of the medicinal plants, which is widely used in pharmaceutical and food industries. Due to the effective role of micronutrients in the quantitative and qualitative yield of medicinal plants, the effect of foliar application of iron chelate (0, 1.5 and 3 g/L) and zinc ...
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Foeniculum vulgare Mill. is one of the medicinal plants, which is widely used in pharmaceutical and food industries. Due to the effective role of micronutrients in the quantitative and qualitative yield of medicinal plants, the effect of foliar application of iron chelate (0, 1.5 and 3 g/L) and zinc chelate (0, 1.5 and 3 g/L) on the functional properties and essential oil content of native and improved (cv. Soroksari) fennel was evaluated. The experiment was conducted as a split-split plot, based on RCB design with three replications during 2018 at the University of Kurdistan. Simple effects of iron chelate, the interaction iron chelate and cultivar, as well as the interaction iron chelate, zinc chelate and cultivar type, had no significant effect on measured traits. Zinc chelate significantly affected most of the studied traits, so that the highest of essential oil content (5.06%) and yield (35.07 L/ha) were belonged to 3 g/L treatment, while the highest seed yield (884.2 kg/ha) was obtained in zero treatment of zinc chelate. The interaction of iron chelate and zinc chelate as well as the interaction of zinc chelate and cultivar had only a significant effect on seed width and number of umbels, respectively. The impact of cultivar had a significant effect, on the number of umbels per plant, seed yield, and essential oil yield, so that the highest average of mentioned traits (25.29, 765.26 kg/ha and 34.27 L/ha, respectively) were belonged to native fennel. Generally, among the fertilizer treatments, 3 g/L zinc chelate and between the two types of fennel, native fennels were recognized as superior.
Babak Bahreininejad; Ali Ashraf Jafari; Zahra Jaberalansar
Abstract
This study was carried out to compare growth characteristics of three species of Alyssum minus, A. szwitsianum and A. desertorum over two years, 2017 and 2018, in a randomized complete block design with three replication at Isfahan Agricultural and Natural Resources Research and Education Center. Measured ...
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This study was carried out to compare growth characteristics of three species of Alyssum minus, A. szwitsianum and A. desertorum over two years, 2017 and 2018, in a randomized complete block design with three replication at Isfahan Agricultural and Natural Resources Research and Education Center. Measured traits were yield characteristic including total dry weight, leaf, stem, root and seed dry weight; morphological characteristics including plant height, maximum and minimum plant diameter, plant cover and stem number; and phenolological characteristics including day to flowering, day to seeding and day to seed ripening. The highest biological and seed yield were achieved in A. minus, 1003 and 375 kg/ha respectively, while A. desertorum showed the lowest rates, 559 and 207 kg/ha respectively. Morphological traits analysis represented that A. minus had the highest rates of plant height, stem number, plant diameter and cover. A. minus and A. desertorum with 101 and 95 days to seed ripening were the longest and shortest lifelong species. The highest correlation rates between seed yield with other characteristics were including biological yield (0.90), plant height (0.79), stem number (0.76) and cover (0.75). On the whole, results of this study showed that A. minus showed the highest yield potential among the studied species.
Jaber Esazadeh Panjali Kharabasi; Mohammad Galavi; Mahmoud Ramroudi
Abstract
In order to evaluate the effects of drought stress and methanol foliar application on some quantitative and qualitative traits of soybean (cv. Viliamz), a split plot experiment was conducted based on randomized complete block design at the Faculty of Moghan Research Farm in 2011. Treatments were three ...
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In order to evaluate the effects of drought stress and methanol foliar application on some quantitative and qualitative traits of soybean (cv. Viliamz), a split plot experiment was conducted based on randomized complete block design at the Faculty of Moghan Research Farm in 2011. Treatments were three levels of drought stress based on irrigation at depletion of 40, 55 and 70 percent of available soil moisture comprising the main-plot and four rates of methanol foliar application including non-methanol spraying (control), 7, 21 and 35 volumetric percentages as sub-plots that were applied with three replications. Drought stress significantly affected stem diameter, pod length, number of seed per pod, number of pod per plant, seed yield, HI, soluble carbohydrates, chlorophyll content, oil and protein percentage of seed. Drought stress increased soluble carbohydrates and oil percentage of seed and decreased other traits, so that irrigation at depletion of 70 percent of available soil moisture decreased seed yield by 33.87 percent. Methanol foliar application significantly affected number of pod per plant, seed yield, chlorophyll content, pod length, number of seed per pods, soluble carbohydrates and seed protein content. The greatest effect of methanol foliar application on studied traits obtained from 21 percent by volume of methanol and increased seed yield by 25.6 percent in comparison with the control and the highest seed yield for irrigation after 40 percent depletion of available moisture was obtained.
Esmaeil Rezaei-chiyaneh; Jalal Jalilian; Elnaz Ebrahimian; Seyed Mohamad Seyedi
Abstract
In order to investigate the effects of different irrigation levels and biological fertilizers on quantitative and qualitative yield of ajowan (Carum copticum L.), a field experiment was conducted at a farm located in West Azerbaijan province - city Nagadeh, Iran during growing season of 2012-2013. The ...
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In order to investigate the effects of different irrigation levels and biological fertilizers on quantitative and qualitative yield of ajowan (Carum copticum L.), a field experiment was conducted at a farm located in West Azerbaijan province - city Nagadeh, Iran during growing season of 2012-2013. The experiment was arranged as split plot based on Randomized Complete Block Design in three replications. The main plots were allocated to irrigation levels (Irrigation after 50 mm (control), 100 mm (moderate water stresses) and 150 mm (severe water stresses) evaporation from class A pan) and sub-plots were allotted to biological fertilizers (Mycorrhiza, the combination of Azotobacter and Barvar Phosphate-2, Mycorrhiza + Azotobacter + Barvar Phosphate-2 and control). Results showed that by increasing irrigation times from 50 to 150 mm evaporation, plant height, number of umbel per plant, 1000 seed weight, biological yield, seed yield and concentration and content of essential oil in ajowan were significantly decreased. Among the biological fertilizers, combined usage of biofertilizers (Mycorrhiza + Azotobacter + Barvar Phosphate-2) showed greater increment in studied traits than individual consumption. In each irrigation levels (Irrigation after 50, 100 and 150 mm evaporation), the highest seed yield (783 kg/ha) was obtained from combined usage of biofertilizers and the lowest seed yield (400 kg/ha) belonged to control treatment, respectively.
Farrokh Omidi; Ali Sepehri
Abstract
In order to study of Sodium Nitroprusside(SNP) application effect on growth indices and water use efficiency of kidney beans cultivars(Akhtar and Derakhshan) under water deficit stress, an experiment was conducted in split factorial based in randomized complete block design with three replications in ...
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In order to study of Sodium Nitroprusside(SNP) application effect on growth indices and water use efficiency of kidney beans cultivars(Akhtar and Derakhshan) under water deficit stress, an experiment was conducted in split factorial based in randomized complete block design with three replications in Bu-Ali Sina university research field at 2012. Water stress treatments included vegetative stress, reproductive stress, vegetative+reproductive stress and non-water stress (control). Foliar application of SNP was done in 3 concentration(0, 150 and 300 µM SNP). Reproductive stress reduced leaf area, crop growth rate and total dry weight in both cultivars. SNP foliar application (300 µM) increased mentioned indices 28, 26 and 20 percent in Akhtar and 28, 20 and 20 percent in Derakhshan in comparison to without foliar application, respectively. Water use efficiency of grain and water use efficiency of biomass in vegetative stress was more than of non-water stress. Maximum amount of water use efficiency was for Akhtar cultivar with 300 µM Sodium Nitroprusside foliar application and were 0.72 and 2.9 percent for grain and biomass, respectively. SNP foliar application ameliorated and improved negative effects of vegetative and reproductive stress. SNP application(300 µM) had more effect on growth and yield in both cultivars at all water regimes. Therefore, foliar SNP(300 µM) it’s desirable for kidney bean under water deficit stress.
Esmaeil Rezaei-chiyaneh; Sorour Khorramdel; Parisa Garachali
Abstract
To evaluate the yield components, yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.), a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station ...
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To evaluate the yield components, yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.), a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station Payamenoor University of Nagadeh, Iran during growing reason of 2012-2013. The treatments included row intercropping )one row of sunflower + one row of faba bean(, strip intercropping )two rows of faba bean + four rows of sunflower, four rows of faba bean + two rows of sunflower, three rows of faba bean + three rows of sunflower( and monoculture faba bean and sunflower. The results indicated that the relay intercropping patterns had significant effect on studied traits of sunflower and faba bean (except number of seed per pod of faba bean). The highest seed yield of sunflower (4140 kg/ha) and faba bean (2567.33 kg/ha) were obtained from row intercropping and the lowest seed yield of sunflower (3136.67 kg/ha) and faba bean (1957 kg/ha) were obtained in their monoculture. The oil percentage of all intercropping treatments was higher than monoculture. The maximum land equivalent ratio (1.85) and actual yield loss (1.74) were calculated in row intercropping and the highest intercropping advantage (1.25) was achieved in four rows of faba bean + two rows of sunflower. The results showed that the use of relay intercropping results in better utilization of environmental resources and increased crop production compared to monoculture of the same species.
sodabe norzad; Ahmad ahmadian; Mohammad Moghaddam; elham daneshfar
Abstract
To study the effect of drought stress during using organic and chemical fertilizers on morphological, agronomic traits and the essential oil of coriander, a field experiment was conducted as split plot based on randomized complete block design in three replications at Agricultural Research Station, College ...
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To study the effect of drought stress during using organic and chemical fertilizers on morphological, agronomic traits and the essential oil of coriander, a field experiment was conducted as split plot based on randomized complete block design in three replications at Agricultural Research Station, College of Agriculture, University of Torbat Heydarieh, Iran during growing season of 2010-2011. Treatments were consisted of three levels of drought stress (30, 60 and 90 percent FC) and fertilizer treatments [control, NPK (60: 60: 40), caw manure (25 ton/ha) and vermicompost (25 ton/ha)]. Different traits such as plant height stem diameter, number of branches, number of leaves per plant, fresh and dry weight, herbage yield and number of umbels per plant, number of seeds per umbel, total number of seeds in plant, fruit yield, 1000 seed weight and essential oil percentage and yield were recorded. Analysis of variance indicated that water stress and application of fertilizer treatment had significant effect on all studied trait. The maximum herbage yield (5371 kg/ha) and seed yield (3905 kg/ha) were achieved in 90 percent FC combined with NPK and mild stress under NPK treatment, respectively. The highest essential oil percentage (0.77 percent) and essential oil yield (18.49 kg/ha) were obtained in mild stress by using chemical fertilizers. According to the fact that application of fertilizers in mild stress conditions leads to increase in essential oils yield, using chemical fertilizers under mild drought stress is recommended for coriandering as a medicinal plant.
Alireza Behdadian; Afshin Soltani; Ebrahim Zeinali; Hossein Ajam Norouzi; Hassan Masoumi
Abstract
To evaluate the effects of nitrogen management at yellow budding stage on seed yield with using nitrogen nutrition index (ratio of nitrogen concentration in the plant to optimum concentration), of rapeseed farms in Gorgan, an experiment was conducted as a nested model arranged in a complete randomized ...
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To evaluate the effects of nitrogen management at yellow budding stage on seed yield with using nitrogen nutrition index (ratio of nitrogen concentration in the plant to optimum concentration), of rapeseed farms in Gorgan, an experiment was conducted as a nested model arranged in a complete randomized design (CRD) in 2010. Fifteen rapeseed fields were classified at three levels of management (optimum, middle, weak). During the experiment, questionnaires were completed by farmers for quantification of agricultural management. The results showed that levels of management are significantly difference from nitrogen nutrition index (NNI) (P<0.01). Although quantities of nitrogen nutrition index (NNI) were higher in optimum level of management than the middle and weak levels, but at all management levels during the growing season, the index was less than one. This indicates restriction in development and production due to nitrogen deficiency. Nitrogen nutrition index in yellow budding stage have, significant positive correlation (P<0.05) with seed yield, and confirmed importance of access to nitrogen sources in yellow budding stage.
Khadijeh Roustaie; mohsen Movahhedi Dehnavi; Seyed Ali Khadem; Hamid Reza Owliaie
Abstract
To investigate effects of different super absorbent polymer and animal manure ratios on the quantitative and qualitative characteristics of soybean under drought stress, a split plots experiment was conducted based on randomized complete block design with three replications in Marvdasht, Iran in 2009. ...
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To investigate effects of different super absorbent polymer and animal manure ratios on the quantitative and qualitative characteristics of soybean under drought stress, a split plots experiment was conducted based on randomized complete block design with three replications in Marvdasht, Iran in 2009. Main factor included of irrigation with 50, 100 and 150 mm evaporation from pan class A and sub factor included of control, 40 t.ha-1 animal manure, 200 kg.ha-1 super absorbent polymer, 50 percent super absorbent polymer + 50 percent animal manure, 65 percent super absorbent polymer + 35 percent animal manure and 35 percent super absorbent polymer + 65 percent animal manure. The results showed that, number of pod and grain per plant, 1000 grain weight, grain yield, biological yield, protein yield and oil yield were decreased by drought stress occurrence and were increased with super absorbent polymer and animal manure application. The highest yield (2148.3 kg.ha-1) was obtained in control treatment. Results showed that the combinations of super absorbent polymer and animal manure significantly increased grain, biological, oil and protein yield compared with control. Finally, combination of 35 percent super absorbent polymer and 65 percent animal manure was the best treatment in this experiment.
Hamid Iran nejad; Mahboobeh Poshtkoohi; Zeinab Javanmardi; Reza Amiri
Volume 11, Issue 2 , November 2009, , Pages 11-17
Abstract
The performance of nine different linseed cultivars studied in a randomized complete block design (RCB) with four replications in Varamin region (Iran) in 2006. The traits were seed yield, fatty acids, protein and oil content of linseed. The difference between cultivars was significant for all traits ...
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The performance of nine different linseed cultivars studied in a randomized complete block design (RCB) with four replications in Varamin region (Iran) in 2006. The traits were seed yield, fatty acids, protein and oil content of linseed. The difference between cultivars was significant for all traits (P< 0.01). The Legina cultivar had the highest seed yield (3000 kg/ha) and linolenic acid content (45.16 percent). The palmitic acid content of RH 14/05 cultivar, oil percent and stearic acid of GOLDA cultivar, and protein content and yield of native cultivar were higher than other cultivars (p< 0.05). The RH 14/05 cultivar which was low in linolenic acid and high in oleic acid can be used as a breeding line to produce oil.