The Effect of Deficit and Salinity of Irrigation Water on Yield and Yield Components of Maize (KSC-500) During Different Growth Stages in Ahwaz Climate

Journal of Water Science & Engineering

مقاله 3، دوره 1، شماره 1، آذر 2011، صفحه 33-44   

نوع مقاله: Original Article

نویسندگان

Amir Soltani Mohammadi^{* 1}؛ H A Kashkuli¹؛ A Naderi²؛ S Boromandnasab¹

¹Irrigation and Drainage Department, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz.

²of Agronomy Department, Science and Researche Branch Islamic Azad University, Khouzestan, Iran.

چکیده

This research was carried out to study the effect of deficit irrigation and saline water on yield and yield components of maize (KSC-500) during different growth stages for Ahwaz climatic condition in the farming years 2010-2011. This research performed in three independent experiments according to a randomized complete block design with split plot layout in three levels of irrigation water and three levels of saline water during three growth stages: vegetative (Experiment 1), flowering (Experiment 2) and after flowering (Experiment 3). Irrigation water treatments were I₁=100, I₂= 75 and I₃=50 % of crop water requirement and saline water treatments were S₁=Karoon river water, S₂=S₁+1 and S₃=S₁+2dS
m^-1. The results of this study showed that the interaction of deficit and salinity irrigation water did not have any significant effect on factors (number of seeds per ear, 100-grains weight, grain yield, biological yield and harvest index) during all experiments but those factors decreased with increasing water and salinity stress. A maximum grain yield obtained from I₂ in experiment 1 with 5.2 ton ha^-1. A maximum GY obtained from I₁ in other experiments with 5.8 and 6.2 ton ha^-1 in experiment 1 and 2, respectively. Also, a maximum GY obtained from S₁ in all experiments with 5.3, 5.5 and 6.7 ton ha^-1 for experiments 1, 2 and 3, respectively. After  the flowering stage was the most sensitive growth stage to water deficit and salinity stress.

کلیدواژه‌ها

deficit irrigation؛ growth stages؛ Maize؛ Salinity of irrigation water

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