عنوان مقاله [English]
نویسنده [English]چکیده [English]
Nitrogen management under water limitation condition is an important factor to obtain high grain yield of Maize. The research was conducted to evaluate the effects of irrigation management and different levels of nitrogen fertilization on yield, yield components and water productivity of maize. This experiment was conducted on research farm of Shahid Chamran University Ahvaz, Iran in 2015. The experimental design was a Split plot based on randomized complete block with three replications. Two main treatments, namely furrow irrigation with continuous flow (C) and Cutback furrow irrigation (CB) and four sub-treatments different levels of nitrogen ( 0, 50%, 75% and 100%) supplied nitrogen with three replications. Statistical analysis showed that reduction in using of nitrogen fertilizers significantly reduced the maize yield and its components. The study was for grain yield maize value between 5.5 to 10.6 ton.ha-1 and for biological yield maize value between 12.2 to 39.9 ton.ha-1. Maximomed water productivity equal to 1.25 kg.m-3 and maximum water productivity in lieu of biological yield maize was equal to 4.15 kg.m3, which both related to irrigation cutback with 100% nitrogen. The results showed that using of nitrogen fertilizer, produce maximum maize yield. So to improve the water productivity of crops is recommended that in addition to reducing water consumption improving yield performance by using new cultivation management.