Document Type : Research Paper

Authors

1 Department of Plant Production and Genetic, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran. E-mail: b.dolatparast@agri.uok.ac.ir

2 Corresponding Author, Department of Plant Production and Genetic, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran. E-mail: f.hosseinpanahi@uok.ac.ir

3 Department of Plant Production and Genetic, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran. E-mail: a33@uok.ac.ir

4 Agriculture and Natural Resources Research and Education Center of Hamedan Province, Hamedan, Iran. E-mail: h.mansori@areeo.ac.ir

Abstract

Considering the importance and value of water and optimal use of nitrogen for maintaining production productivity and simultaneously reducing the negative environmental effects, two experiments have been conducted in 2017-2018 and 2018-2019 cropping seasons in the research farm of the Faculty of Agriculture, University of Kurdistan. The experiments are performed as a split plot in a randomized complete block design with four replications. Experimental treatments include the different levels of irrigation as the main plots (25% (W1), 50% (W2), 75% (W3), and 100% (W4) of crop water requirement) and different levels of nitrogen fertilizer as sub-plots (25% (N1), 50% (N2), 75% (N3), and 100% (N4) based on crop nitrogen requirement). Results show that all the studied traits with the exception of the time of reaching the maximum pod area index are affected by the main and interaction effects. The highest grain yield is obtained in W4N4 treatment (5069 kg.ha-1) and the lowest grain yield in W1N1 and W1N2 treatments at 880 and 899 kg.ha-1, respectively, which has been decreased by 82.6% and 82.2%, compared to the control, respectively. The grain and biological yield of W4N3 (4826 and 17589 kg.ha-1) and W3N4 (4712 and 17657 kg.ha-1) treatments, represent 25% reduction in nitrogen consumption and 25% reduction in water consumption, respectively compared to the control. W4N4 is recognized as the superior treatment in this study for improving productivity.

Keywords

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