Document Type : Original Article
Authors
1
M. Sc graduated of irrigation and drainage, Department of Water Science and Engineering, Faculty of Agriculture, Razi University, Kermanshah, Iran.
2
Assistant professor, Department of Water Science and Engineering, Faculty of Agriculture, Razi University, Kermanshah, Iran.
3
ssistant professor, Department of Water Science and Engineering, Faculty of Agriculture, Razi University, Kermanshah, Iran.
4
Associate Professor, Department of Plant Production Engineering and Genetics, Faculty of Agriculture, Razi University, Kermanshah, Iran.
Abstract
This study was carried out in a randomized complete block design with four treatments (120, 100, 80 and 60% of field capacity) in order to investigate the effects of deficit irrigation on growth, qualitative, qualitative and water use efficiency of grain maize in Kermanshah. Three replications were designed and conducted in the form of furrow irrigation. The results showed that deficit irrigation effects on grain yield, biomass, leaf area index, harvest index, crop canopy, grain fat productivity, weight of stems, weight of leaves, weight of ears, number of kernels per ear, length of kernels, water use efficiency in grain, water use efficiency in biomass and water use efficiency in fat were significant. The impacts of water stress on the characteristics of maize different in different stages of growth and were higher at the end of the growing season (grain filling stage) so that the application of 40 percent water stress in grain yield, biomass yield, 1000-seed weight and number of grain per ear to the values 3631(Kg), 12143(Kg), 211.66(g) and 288, respectively, reduced 69, 49, 11 and 21 percent compared to the control treatment. The maximum water use efficiency in grain yield ,biomass and fat in the treatment of excess Irrigation was obtained at 1.15, 2.74 and 0.0548 Kg / ha respectively. Therefore, deficit irrigation of maize (KSC 706) is not recommended in Kermanshah.
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