Abstract: In order to investigate agroecological parameters of Iranian rice genotypes in modified systems, an experiment was carried out as split plot in randomized complete blocks design based four replications at Neka, Mazandaran, Iran in 2011 and 2012. Planting systems were chosen as main plots (Conventional, Improved and SRI or System of Rice Intensification) and genotypes as sub plots (Tall plant: Sang Tarom and Hashemi Tarom; Short plant: Neda and Shiroodi). The results showed the least number of days to start of tillering, day number to initial heading, days number to 50% flowering, days number to full heading and days number to physiological maturity were obtained in SRI and improved system. Therefore, the highest grain yield 6412 kg/ha was produced in SRI. The highest grain yield equivalent to 7272 and 7315 kg/ha because of dwarf plant and short of source and sink distance was observed for var. Neda and Shiroodi. The minimum days number to physiological maturity days was observed at interaction of SRI and improved system with var. Tarom Hashemi. The highest grain was produced at interaction of SRI with var. Neda. Therfore, SRI was the soutable for rice genotypes in this location.
کلید واژگان :Growth period, SRI, cropping system, grain yield, Rice
ارزش ریالی : 600000 ریال
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