杂交晚稻每年均有一些地方发生提早抽穗现象,它是在非正常生长条件下提早抽穗、抽穗分散并大幅减产的一种现象,发生早穗的晚稻一般在移栽后10~15天抽穗。由于早穗苗分蘖晚,分蘖参差不齐,分蘖与主茎发育进度差异大,故田间表现出见穗早、齐穗迟、抽穗期拉得很长。产生早穗的稻株,也明显较正常稻株矮小、叶色淡、分蘖少、穗子小,空秕粒增多,甚至有些稻穗不能全 Early hybridization occurs in some places every year in hybrid rice. It is a phenomenon of early heading, scattered heading and large yield reduction under abnormal growth conditions. Late rice with early heading usually takes 10-15 days after transplanting. Early tillering tillering late, tiller uneven, tillering and main stem development of large differences, so the field showed early heading, full heading late, heading a long stretch. Rice plants that produce early spikes are also significantly shorter than the normal rice plants, pale leaves, less tillers, small ears, increased number of empty pods, and even some panicles can not be fully