Optimized Pattern for High Yield Cultivation of High-quality Hybrid Rice Variety Zhongyou 608

Correlation of yield to cultivation density and NPK application amount of high-quality hybrid rice variety Zhongyou 608 were analyzed,mathematical model of each factor and yield index was established,and optimized pattern for high yield cultivation on Zhongyou 608 was determined by application of quadratic general rotation design to study the effect of NPK amount and cultivation density to yield,and explore the high yield cultivation pattern for Zhongyou 608.The results showed that the optimal planting density was 14.8～15.4 thousand plants/667 m2,N was 11.39～12.74kg/667m2,P2O5 was 10.45～11.83 kg/667m2,and K2O was 7.98～10.02kg/667 m2 with 1500kg/667 m2 of organic fertilizer.