Effects of Nitrogen Fertilizer Rate and Transplanting Density on Yield and Grain Quality of ‘Yunjing 30'

A field experiment was conducted with different nitrogen fertilizer rates and transplanting densities by using Yunjing 30 as material under the same basic fertilizer conditions. The results showed that plant height,maximum number of tillers,productive panicle number and grain number per panicle increased significantly while seed setting rate and 1000-grain weight decreased with the increasing N rate. The maximum number of tillers,productive panicle number and grain number per panicle were increased markedly with decreased transplanting density,while the effects of transplanting density on plant height,seed setting rate and 1000-grain weight were not significant. The yield of Yunjing 30 was obvious affected by N rate and transplanting density. And the highest yield( 12 198. 2 kg /hm2) was gained under the condition of 150 kg /hm2 pure N and 600 000 points /hm2 transplanting density. It was beneficial to improve the rice milling quality and appearance quality by reducing N rate and increasing transplanting density. The N rate and transplanting density had no significant effect on ADV and amylose content. The protein content of rice increased with the increasing N rate and transplanting density. The optimum cultivated style could get good quality and high yield of Yunjing 30 with 150 kg /hm2 pure N and 600 000 points /hm2 transplanting density.