EFFECT OF IRRIGATION MANAGEMENT ON YIELD AND WATER PRODUCTIVITY OF RICEHasan Sabeti Rad and Ebrahim Amiri
Field experiments were laid out to determine the effect of irrigation management on yield and water productivity of different Rice varieties at north of Iran, Rudsar. The research was laid out at in 2006 in split plot design in three replications with nine irrigation management (11 with continuous irrigation while 12, 13, 14 and 15 were irrigation 1, 3, 5 and 8 days after water disappearance of ponded water, 16, 17 and 18 were irrigation at 3, 5 and 8 days intervals and 19 saturated soil during whole growth season) as main plots while three varieties (Hashemi, Ali Kazemi and Hybrid) as sub plots. The ANOVA revealed non significant differences for different irrigation management as compared to continuous irrigation management for grain yield indicating that water can be considerably saved for cultivating rice without compromising on grain yield. However, significant differences were observed in different irrigation management for the irrigation depth and water productivity (WPI and WPI+R). The results of this research of showed, water saving was on average 42% with yield reduction of only 12%. Water Productivity (WPI and WPI+R) were 0.59-1.98 and 0.52-1.52 Kg grain per m water.
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