不同穗肥施用方法对杂交稻经济性状及产量的影响

Effects of Different Panicle Fertilizer Application Methods on Economic Characters and Yield of Hybrid Rice

为进一步了解后期施肥对杂交稻经济性状和产量的影响,根据超级稻新品种选育与示范推广项目要求,2012~2014年连续3 a进行水稻穗肥对比试验。试验设6个不同穗肥用量和1个空白对照处理。试验结果显示:施用穗肥对提高水稻产量效果非常显著,产量的提高主要与增加水稻粒数有关。建议早稻促花肥施尿素和氯化钾各4~6 kg/667m^2,保花肥施尿素和氯化钾各3~4kg/667m^2;晚稻促花肥施尿素和氯化钾各6~8 kg/667m^2,保花肥施尿素和氯化钾各3~4 kg/667m^2。

In order to further understand the effect of late fertilization on economic characters and yield of hybrid rice, a comparative experiment of panicle fertilizer was carried out for three consecutive years from 2012 to 2014 according to the requirements of new super rice variety breeding and demonstration and extension project. 6 different panicle fertilizer levels and 1 blank control treatments were used. The results showed that the effect of applying panicle fertilizer on increasing rice yield was very significant, and the increase of rice yield was mainly related to the increase of grain number. It is suggested that urea and potassium chloride should be all applied 60-90 kg/hm^2 respectively for early rice florescence promotion, 45-60 kg/hm^2 for flower preserving respectively. The application of urea and potassium chloride were all 90-120 kg/hm^2 for late rice florescence promoting fertilizer, 45-60 kg/hm^2 for flower preserving fertilizer.