Study on high yielding cultivation measures of Japonica hybrid rice in north region.

Using Liaoyou 9466 as a material,the effect of application of N,application of panicle fertilize,seeding rate and planting spacing and plant number on rice growth and development were studied by standardization design to determinate cultivation measure in condition of high-yield rice for heightening rice yield and improving rice quality.The results showed that the effect rank of all factors on grain yield was application of N planting number planting spacing planting number application of panicle fertilizer.Increasing application of N and decreasing plant number was the optimized cultivation measures for increasing grain yield.The optimized condition for producing over 9.97 t/hm2 of grain yield were as followss:the application of N was 172.4-177.6 kg/hm2,application of panicle fertilizer was 14.1-15.9 kg/hm2,plant number was 2.2-2.4 seed/pot,planting spacing was 484.2-515.8 cm2,plant number 2.9-3.1 plant/hill.