Document Type : Research Article
Authors
1 Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran.
2 Guilan University
3 Rice Research Inst.
4 Lahijan Azad University
Abstract
Abstract
In order to study the effects of different irrigation management on water productivity of local, improved and hybrid rice varieties an experiment was carried out on a split plot design with 3 replications. The varieties were splited on 5 irrigation methods (i.e. full irrigation, AWD, 5, 8 and 11 day irrigation interval) at Rice Research Institute of Iran, Rasht during cropping season of 2006. The results showed that interval irrigation reduced water use. Full irrigation with 593 mm had the highest water use and 11 day interval with 406 mm the lowest. Yield in hybrid, improved and local varieties were 6147, 5147 and 3987 kg/ha respectively. Results showed that yield loss in the varieties due to water stress (full irrigation, 5, 8 and 11 day interval irrigation) in hybrid were 9,19,23 and 44 percent, in improved were 14, 19, 23 and 29 percent and in local variety were 5,4,10 and 17 percent respectively. Local variety was the most resistant and hybrid was the most susceptible variety.
Keywords: Intermittent Irrigation, yield, water productivity, rice
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