摘要 : The present paper studied the effects of water deficit in different growth stages on the traits related to the grain in three cultivars of chickpea with different levels of water deficit stress. The experiment was carried out in t... 展开 The present paper studied the effects of water deficit in different growth stages on the traits related to the grain in three cultivars of chickpea with different levels of water deficit stress. The experiment was carried out in the research field of Islamic Azad University, Tabriz Branch in a split plot of complete randomized blocks design in three replications. Water deficit as the main factor included seven levels: Control (without stress), stopping irrigation in vegetative growth stage (chickpea height: 15 cm), stopping irrigation in reproductive growth stage (50% flowering), stopping irrigation in the grain filling stage, irrigation starting from the vegetative growth stage once every 16 days, irrigation starting from the reproductive growth stage once every 16 days, irrigation starting from the grain filling stage once every 16 days and three cultivars of chickpea (Arman, Azad and ILC-482) were the secondary factors. Based on the results obtained from the analysis of variances the Arman cultivar had the maximum number of pods in branch, the weight of seeds in multiple seed pods and the Azad and ILC-482 had the maximum seed weight in multiple seed pods. But for the weight of 100 seeds and the number of pods in the plant there were no significant differences between the different cultivars under study. In the trait of seed weight in single seed pods, irrigation stopping in the vegetative growth stage, reproductive growth stage and grain filling stage, with the maximum reduction in case of stopping irrigation in the vegetative growth stage, resulted in significant reduction of traits. The maximum amount of reduction in the number of pods in the plant was related to the treatment of irrigation stopping in the vegetative growth stage. In this treatment, the number of pods in the plant was 67% less than the number of pods in the plant in control. Irrigation stopping in the reproductive growth stage also resulted in a significant reduction in the number of pods in the plant and reduced this trait up to 25%. Also all of the water deficit treatments resulted in significant reduction of the weight of 100 seeds compared to the control. The maximum amount of reduction in the weight of 100 seeds was caused by irrigation stopping in the vegetative growth stage with 28% reduction compared to control. Comparing the mean seed yield per unit area under different treatments of water deficit stress showed that irrigation starting from the vegetative growth stage once every 16 days and irrigation starting from the reproductive growth stage once every 16 days and irrigation starting from grain filling stage once every 16 days had no significant effect on the grain yield in the plant. 收起