Study on rice on growth redundancy and compensation.

According to the stage of rice growth,the rice redundancy were divided into the nutrition growth redundancy and the procreation growth redundancy.The results in Sichuan rice area and Chongqing(Wanzhou)rice area for many years showed that the average redundancy of Shanyou 63 in the nutrient phase were 36.6 % and 39.1 % and the average redundancy of phase were 17.7 %、14.6 %,repectively.In the trial procedure of Sichuan's and Chongqing's rice district,the best effective heading was 0.01625 million/667m2,and the actual grain number was 125.1 grains/panicle.The best redundancy degree of Sichuan's rice district was 36.0 %.