Ali Sepehri; Roya Abasi; Afshin Karami
Abstract
In order to evaluate the effect of salicylic acid on yield and yield components of bean genotypes under water deficit stress, an experiment was carried out as a factorial split plot design with three replications in research farm Bu Ali-Sina University (Hamadan, Iran) during 2009. Stress levels: consist ...
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In order to evaluate the effect of salicylic acid on yield and yield components of bean genotypes under water deficit stress, an experiment was carried out as a factorial split plot design with three replications in research farm Bu Ali-Sina University (Hamadan, Iran) during 2009. Stress levels: consist of vegetative water stress, reproduction water stress and without water stress (control) and three bean genotypes (‘Akhtar’, ‘D81083’ and ‘KS31169’) allocated in the main plots and three concentrations of salicylic acid 0, 0.5 and 1 mM to the sub-plots. Based on results the treatments had significant effects on plant height, number of branches, pod number per plant, seeds per pod, 100 seed weight, biological yield, grain yield and harvest index. Vegetative and reproductive drought stresses reduced grain yield but foliar application of Salicylic acid improved the growth and yield of bean. Utilizing salicylic acid in vegetative and reproductive stages improved the grain yield 17.2 and 16.8 percent, respectively. Such this result observed for biological yield too. Totally this research showed that between the genotypes of experiment, the ‘D81083’ and ‘Akhtar’ genotypes had higher grain yield and harvest index compared to ‘KS31169’. Foliar application of salicylic acid not only improved the growth and yield in no-stress condition but also for adjusting the drought stress especially at vegetative stress is recommended
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.
shahin khodabandehloo; Ali Sepehri; Godarz Ahmadvand; Amir Hossiein Keshtkar
Abstract
The water deficit is the most important limiting non-biological factor to achieve the potential yield of crops. To evaluate the effect of silicon application on yield of millet under drought stress in field an experimental was carried out. Treatments were included three irrigation regimes after 60 (non-stress), ...
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The water deficit is the most important limiting non-biological factor to achieve the potential yield of crops. To evaluate the effect of silicon application on yield of millet under drought stress in field an experimental was carried out. Treatments were included three irrigation regimes after 60 (non-stress), 90 (moderate stress) and 120 (severe stress) mm evaporation from evaporation pan, class A and four methods of silicon application including non-spray (control), spray, spray and using with irrigation water and using silicon with irrigation water in 2012 growing season in split plot based on randomized complete block design (RCDB) with three replications in Hamedan. The results showed that the effect of drought stress and silicon on all traits, except water use efficiency under drought stress and number of grains per spike after silicon application were significant. The biological yield and grain yield were decreased by 15 and 22 percent in the moderate stress and 33 and 42 percent in the severe stress, respectively. Interaction between drought and silicon application on 1000 seed weight, grain yield and water use efficiency were significant. The use of integrated silicon as spray and irrigation water had the highest positive effects on grain weight, water use efficiency, harvest index and benefit-cost ratio. Economic analysis of different treatments showed higher benefit-cost ratio of all silicon applications. But maximum benefit-cost ratio was recorded from spray and using irrigation water. Therefore, applications of silicon in combination of both methods are recommended.