dalir fayazipour; Gholam Ali Akbari; Iraj Allah dadi; fatemeh amini; Marjan Alsadat Hoseinifard
Articles in Press, Accepted Manuscript, Available Online from 26 May 2021
Abstract
This study aimed to evaluate the effects of planting date and spraying CCC on some biochemical characteristics and qualitative and quantitative yield of sugar beet. Therefore, the experiment was conducted using a Split factorial based on randomized complete block design with three replications in 2015-2016 ...
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This study aimed to evaluate the effects of planting date and spraying CCC on some biochemical characteristics and qualitative and quantitative yield of sugar beet. Therefore, the experiment was conducted using a Split factorial based on randomized complete block design with three replications in 2015-2016 growth season in field experiment of university of Abourayhan, Tehran University. Treatment were planting date (2 October and 22 October) as the main factor and cultivars (Suprima and 9597) and foliar spraying (1000 ppm) / non-application of CCC as sub plots. The results showed that the highest percentage of bolting (54.58%) and sodium content (equivalent to 9.16 mEq / 100 g of sugar beet pulp) were observed in 2 October and the highest root yield (26.15 ton per hectare) and white sugar yield (equal to 1.44 tons per hectare) were obtained in 22 October. Also, it was observed that most values of studied traits (except bolting percentage and sodium content of sugar beet pulp), were occurred by the cultivation of Suprema with CCC spraying. overall, the conclusion that the treatments, the best conditions to determine the best root and sugar yield in the area of research, the date of 22 October, the Suprima and application of 1000 ppm and recommended in order to cultivate of sugar beet in the Pakdasht area.
peyman sharifi; Fatemeh Benakashani; Iraj Allah dadi; Gholam Akbari
Articles in Press, Accepted Manuscript, Available Online from 10 June 2021
Abstract
To evaluate the effect of living mulches on weed control and yield of Black cumin (Nigella sativa L.) weeds by living mulch, a factorial split experiment was conducted in the form of a randomized complete block design with four replications in the research farm of Aburaihan Campus, the University of ...
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To evaluate the effect of living mulches on weed control and yield of Black cumin (Nigella sativa L.) weeds by living mulch, a factorial split experiment was conducted in the form of a randomized complete block design with four replications in the research farm of Aburaihan Campus, the University of Tehran in the 2017-2018 crop year. Factors of seedbed planting (stale seedbed and simple), type of living mulch (berseem clover (Trifolium alexandrinum L.), fenugreek (Trigonella foenum-graecum L.) and alfalfa (Medicago sativa L.), planting time of living mulch (two weeks before and at the same time of black seed cultivation). The first factor was in the main plots and the combination of the second and third factors was in the subplots. The results showed that fenugreek and alfalfa were more successful in terms of weed control than clover with a 40% reduction in weed density and biomass compared to the control without live mulch and without weeding. Also, in order to achieve the highest percentage of black cumin yield traits (83.02, 93.44 and 50.50), the number of capsules per plant, number of seeds per capsule and 1000-seed weight, respectively, compared to the control without living mulch and complete weeding, respectively. It is recommended to cultivate fenugreek at the same time as black cumin. In the case of alfalfa, pre-sowing is also recommended. Stale seedbed planting system did not play a positive and significant role in weed control and increase in black seed yield traits.
Maryam Rahimi Jahangirlou; Gholam Akbari; Iraj Allah dadi; Saeid Soufizadeh; Maryam Rahimi Jahangirlou
Volume 23, Issue 2 , Spring 2021, , Pages 261-276
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.
Shiva Akbari; Iraj Allahdadi; Majid Ghorbani Javid; kourosh Kabiri; Elias Soltani
Volume 21, Issue 2 , Summer 2019, , Pages 181-193
Abstract
In order to study the effect of slow release hydrogel-urea complex (SRHUC) on yield, yield components and physiological traits of barley under water deficit, an experiment was performed in 2017-2018 and conducted as factorial in Randomized Complete Block Design (RCBD) in three replications in greenhouse ...
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In order to study the effect of slow release hydrogel-urea complex (SRHUC) on yield, yield components and physiological traits of barley under water deficit, an experiment was performed in 2017-2018 and conducted as factorial in Randomized Complete Block Design (RCBD) in three replications in greenhouse of Aburaihan campus of University of Tehran. The combination of factorial levels were as fertilization factor containing nitrogen (N) from urea source in five levels of no use of N, equivalent 125 and 65 kg.ha-1 N (without SRHUC) as CU-N125 and CU-N65 and equivalent 125 and 65 kg.ha-1 N with SRHUC as SRHUC-N125 and SRHUC-N65 and water deficit in three levels of 70, 50 and 30% of FC. Water deficit decreased yield and yield components, RWC and SPAD. The highest grain yield in a pot belonged to SRHUC-N125 (41.9 g) and there was no significant difference between CU-N125 (41.5 g) and SRHUC-N65 (39.1 g). For most of the traits, there was no significant difference between SRHUC-N125 and SRHUC-N65 and CU-N125. Under stress, utilization of SRHUC for both N amount could generate a better biological yield and SPAD index. Using N in the form of SRHUC was preferred to using of N without SRHUC, especially under stressed conditions.
Shirin Taghizoghi; Elias Soltani; Iraj Allahdadi; Reza Sadeghi
Volume 20, Issue 3 , Autumn 2018, , Pages 577-593
Abstract
This research was conducted to investigate the effects of different seed coating treatments on the seed germination of canola under drought and salinity stresses. In order to, two factorial experiments were conducted based on completely randomized design with four replications in laboratory. In both ...
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This research was conducted to investigate the effects of different seed coating treatments on the seed germination of canola under drought and salinity stresses. In order to, two factorial experiments were conducted based on completely randomized design with four replications in laboratory. In both experiments, one of the factors were 10 different seed coating treatments. The second factor was different in two experiments: in the first experiment, the levels of drought stress of 0, -0.8, -1, and -1.2 MPa were considered, and in the second experiment, the levels of salinity stress of 0, 7, 14 and 21 ds/m NaCl were investigated. Results indicated that the lowest hydrotime constant (θH) were observed in T9 (22.627 MPa h), T3 (22.538 MPa h), and T6 (22.263 MPa h). The lowest base water potential (Ψb (50)) were belonged to T4 (-1.332 MPa) and T1 (-1.324 MPa). The maximum of germination percentage under salinity stress (Gmax) was observed in T2 (86.75%). The highest threshold to salinity tolerance (Xo) was belonged to T3 (16.38 ds/m). The highest germination rate was belonged to T3 in all levels of salinity. Totally, seed coating treatments of T3, T6 and T9 were the best treatments under drought stress and T3 was the best treatment under salinity stress.
Hamid Jabbari; Nayyer Azam Khosh kholgh Sima; Gholam Abbas Akbari; Iraj Allahdadi; Amir Hossein Shirani rad; Ali Hamed
Volume 18, Issue 1 , Winter 2016, , Pages 1-19
Abstract
In order to study of root system relationship with water relations in Rapeseed under drought stress conditions, a pot experiment was carried out in greenhouse at Agricultural Biotechnology Research Institute of Iran (Karaj) in 2012. Five winter Rapeseed genotypes were evaluated under four irrigation ...
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In order to study of root system relationship with water relations in Rapeseed under drought stress conditions, a pot experiment was carried out in greenhouse at Agricultural Biotechnology Research Institute of Iran (Karaj) in 2012. Five winter Rapeseed genotypes were evaluated under four irrigation treatments, using a factorial experiment based on randomized complete block design. The results indicated that response of genotypes to irrigation treatments was different for stomata conductivity, SPAD value, root length and diameter, morphologic characteristics, yield and yield components. In control, Cooper produced the highest grain yield that due to higher silique number per plant, whereas, ‘Opera’ had the maximum grain yield under drought stress treatments. This subject was due to higher root depth and diameter in ‘Opera’ and on the basis of these characters, the high leaf area duration, stomata conductivity, silique number and grain number was observed in ‘Opera’. In conclusion, these results showed that role of root morphologic characteristics in Rapeseed adaptation to drought tolerance is powerful and an effective root system with last stomata conductivity, more leaf area duration and high silique number were more important for yield maintenance of Rapeseed under drought stress conditions.
Mahdieh Amirinejad; Gholamali Akbari; Amin Baghizadeh; Iraj allahdadi; Maryam Shahbazi; Masoomeh Naimi
Volume 17, Issue 4 , Winter 2016, , Pages 855-866
Abstract
To determine the effects of drought stress and foliar application of zinc and iron on some biochemical parameters of cumin (Cuminum cyminum L.), a greenhouse experiment was carried out at Graduate University of Advanced Technology of Kerman, Iran during 2011-2012. The experiment was conducted in factoriel ...
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To determine the effects of drought stress and foliar application of zinc and iron on some biochemical parameters of cumin (Cuminum cyminum L.), a greenhouse experiment was carried out at Graduate University of Advanced Technology of Kerman, Iran during 2011-2012. The experiment was conducted in factoriel design based on randomized completely block with three replications. Three levels of water deficit 70 (well- watered), 50 and 30 (moderate and severe stress) percent of field capacity with treatments of Zn, Fe, Zn+Fe (5/1000) and non-foliar application (water) were used. Results show positive effects of iron and zinc foliar application under drouth stress on some biochemical parameters of cumin. Maximum quantities of total protein and proline (4.12 and 364.52 mg/gr Fw) and maximum quantities of soluble sugar (5.62 mg/gr Dw) were observed in severe stress with Zn+Fe treatment. Also zinc and iron foliar application decresed malondealdohide (9.16 and 5.06 µM/gr Fw) in moderate and severe stress conditions in cumin leaf, respectively. Drought stress and foliar application increased enzymes activities. Maximum quantities of enzymes activities (catalase: 28.51, gayacol peroxidase: 284.75 and superoxid dismutase: 50.99 U/mg protein) in leaves were observed in severe stress with Zn+Fe treatment too. According to our results, iron and zinc foliar application improves biochemical parameters in cumin under drouth stress.
Sanaz Afshari-Behbahanizadeh; Gholam Ali Akbari; Maryam Shahbazi; Iraj Alahdadi
Volume 17, Issue 2 , Spring 2015, , Pages 487-502
Abstract
In order to evaluate the effect of terminal water deficit stress on leaf traits and their relations to grain yield in different barley genotypes (‘Yousof’, ‘Fajr30’, ‘Nosrat’, ‘PBYT-46’, ‘PBYT-97’ and ‘Morocco’), two separated experiments ...
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In order to evaluate the effect of terminal water deficit stress on leaf traits and their relations to grain yield in different barley genotypes (‘Yousof’, ‘Fajr30’, ‘Nosrat’, ‘PBYT-46’, ‘PBYT-97’ and ‘Morocco’), two separated experiments were conducted in stress (water withholding from anthesis towards the end of growing season), and non stress (normal irrigation) conditions based on RCBD with three replications in 2010-2011 at Yazd Agricultural Research Station. The results indicated that drought stress significantly reduced leaf area index, greeness and increased canopy temperature and leaf rolling. Also, drought stress significantly increased epicuticular wax content at 21 days after anthesis. Studying by Scanning Electron Microscope (SEM) confirmed the increased dispersal of leaf wax crystals in leaf surface in ‘Yousof’ and ‘PBYT-46’ genotypes. ‘Fajr30’ genotype with the highest amount of cuticular transpiration and canopy temperature had the highest reduction in grain yield and ‘Yousof’ and ‘PBYT-46’ genotypes with higher amount of wax crystals dispersal, lower amount of cuticular transpiration, canopy temperature and greeness reduction in stress condition, had the least reduction percentage in grain yield. According to the non significant correlation between leaf wax and grain yield in both conditions (stress and normal) and in stress condition, it seems that increased epicuticular wax crystals had a more effective role than the quantity of wax in drought tolerance of barley genotypes.
Sahar Seyedabbasi; Iraj Alahdadi; Mostafa Oveisi; Gholamali Akbari
Volume 15, Issue 4 , Winter 2014, , Pages 25-33
Abstract
Field experiment was conducted to predict shoot emergence of Sorghum halepenseand Chenopodium albumL.in different planting dates of maize with stale seed bed or conventional planting. 3- parameterweibul gave a good description of cumulative shoot emergence percentage of S. halepense against ...
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Field experiment was conducted to predict shoot emergence of Sorghum halepenseand Chenopodium albumL.in different planting dates of maize with stale seed bed or conventional planting. 3- parameterweibul gave a good description of cumulative shoot emergence percentage of S. halepense against GDD. Planting dates were different in emergence rates. With delaying in palnting time, the rate of emergence and the maximum cumulative emergence decreased.Irrigating the field before planting increased weed seedling emergence. There was no difference between sowing dates in the maximum seedling emergenc, except for the last sowing date i.e. T5 that indicated a lower emergence rate.The last sowing date indicated the least emergence percentage. The current study showed that applying stale seed bed method provided an opportunity for the control of S. halepenseand ,Chenopodium album L.however,with delay in palnting time there was a less S. halepense and –Chenopodium album L.infested seed bed. The knowledge of the relationship between seedling emergence time and the prevailing environmental conditions could be useful to maximise the efficacy of weed control.
Mehdi Zarrabi; Iraj Allah dadi; Gholam Abbas Akbari; Hamid Iran najad; Gholam Ali Akbari
Volume 12, Issue 2 , Autumn 2010, , Pages 37-50
Abstract
To study the seprate and combined effects of phosphorus fertilizer, Phosphate-solubilizing bacteria and mycorrhizal fungus on reducing drought stress damages of grain corn (SC704) during its vegetative stages under field conditions, an experiment was conducted as split plot based on RCBD with three replications ...
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To study the seprate and combined effects of phosphorus fertilizer, Phosphate-solubilizing bacteria and mycorrhizal fungus on reducing drought stress damages of grain corn (SC704) during its vegetative stages under field conditions, an experiment was conducted as split plot based on RCBD with three replications at College of Abouraihan, University of Tehran in 2009. Experimental factors were drought stress as main-plot (irrigation after 50 as control, 100 and 150 mm evaporation from pan class A) and fertilizer plus biofertilizer compounds as sub-plots. Drought stress began after seedling stage. Analysis of variance showed that drought stress significantly affected most of investigated traits such as number of row/ ear, number of kernel/ row, ear weight, 1000kernel weight and grain yield. All the measured traits in compounds phosphate-solubilizing bacteria, mycorrhiza fungies and triple super phosphate treatment were higher than other treatments under water deficit stress conditions. Frthermore, grain yield in triple super phosphate treat under severe water deficit stress conditions (1.81 ton/ha) were significantly less than normal irrigation (8.38 ton/ha) and low stress conditions (4.98 ton/ha). According to this experiment, seed inoculation with phosphate-solubilizing bacteria, mycorrhiza fungies and triple super phosphate compounds affected grain yield and harvest index significantly. This experiment showed that phosphate-solubilizing microorganisms can positively interact in promoting plant growth as well as in P uptake in maize plant, leading to improve plant tolerance under water deficit stress conditions.
Mohammad Reza Labbafi; Faribi Meighani; Hamideh Khalaj; Mohammad Ali Baghestani Meibodi; Iraj Allah dadi; Ali Mehrafarin
Volume 12, Issue 1 , Spring 2010, , Pages 49-57
Abstract
Equal-compartment-agar method was used for studying the effect of allelopathic interaction of wheat and some problematic weeds in wheat. This experiment was accomplished as factorial in complete randomized design with 3 replications in weed research department of Crop Protection Research Institute, Tehran, ...
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Equal-compartment-agar method was used for studying the effect of allelopathic interaction of wheat and some problematic weeds in wheat. This experiment was accomplished as factorial in complete randomized design with 3 replications in weed research department of Crop Protection Research Institute, Tehran, Iran during 2006. The treatments were Niknejad cultivar in 4 densities 0, 8, 16 and 24 seedlings in glass tube and wheat weed spices: rye, oat, field bindweed and hairy vetch. The results indicated that the length of weeds was affected by wheat exudates more than their dry weight and similarly, rootlet was affected more than hypocotyl. In general growth of monocot species was decreased by wheat more than that of dicot species. Except hypocotyl length and dry weight, the increase in wheat density added the inhibition on weeds. Weed species had significant effect only on wheat hypocoty length and dry weight. mean while, oat was shown to be the most inhibitor. Except seedling hypocotyl length and dry weight, treatment of 16 wheat seedling density, caused the increase in wheat growth and dry weight.