黑龙江省寒地水稻后四片叶缺失对产量形成的影响

Effect of Lack of Last Four Leaves on Yield Formation on Rice in Cold Area

为了更准确了解后四片叶对水稻产量的影响,在水稻后四片叶各叶片刚展开时,剪去计划缺失叶片;在水稻孕穗期（剑叶刚展开时）,同时剪去后四片叶各计划缺失叶片进行试验研究。结果表明：单叶片缺失早穗粒数可以减少8~10粒。剑叶缺失空瘪率可增加22%~25%,千粒重降低1 g左右,减产75~130 kg/667 m^2,减产幅度达12.6%~22.8%。后四片叶各计划缺失,空壳率增高、瘪粒率增高、千粒重降,减产严重。因此证明水稻生育后期保留后四片功能叶的重要性,尤其是上部两片叶子对产量形成至关重要。

In order to make us understand the effect of last four leaves on rice more precisely, cut the planning leaf when leaf fiat start and booting stage to make experiment, the resuh indicated that individual leaf missing can make grain number per panicle reduce 8-10 grains, 1000 grain weight reduced 1 g, the yield reduced 75-130 kg/667 m2 and yield reduction reached 12.6%-22.8%. Last four leaves missing can increase sterility rate and shrunken grain rate, 1000 grain weight and yield redeced. The test testified that last four leaves play an important role for ategrowth period of rice, especially upper two leaves have the effect on yield.