Response of agronomical traits and qualities parameters of rice (Oryza sativa L.) genotypes to agronomical ecosystems

In order to consider response of agronomical traits and qualities parameters of rice genotypes to agronomical systems, an experiment was carried out as split plot in randomized complete blocks design based four replications at Neka, Mazandaran, Iran in 2011. 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 that the most number of panicle per m2 and number of total spikelet per panicle were obtained for improved system, but the highest filled spikelet percentage was produced for improved system and SRI, respectively. The highest potassium and phosphorus concentration of grain were seen for SRI. The most nitrogen concentration of grain was obtained for improved system and SRI. Maximum grain yield (4115 kg/h) because of increase number of panicle per m2 and spikelet per panicle was noted for improved system. The most number of panicle per m2, grain yield (4206 and 4545 kg/ha) and harvest index were seen in var. Neda and Shiroodi. The highest nitrogen concentration of grain was observed in var. Tarom Hashemi and var. Shiroodi. The most potassium concentration of grain and straw and phosphorus concentration of grain were obtained for var. Shiroodi.

Genotype, SRI, planting system, N-P-K content, Rice.