近年来杂交稻种子发芽率低,农民反映强烈。笔者经两年多的研究,积累原始数据2千多个,经电脑处理,初步查明了原因。同时,针对性地提出一些对策,应用于生产,获得显著经济效益。一、原因(一)谷粒病害是杂交稻种子发芽率低的首要因子。试验发现不发芽的种子中,病粒占73.78%。以肉眼可见病斑为度,无病种子和有病种子的发芽率相差37.70%。(二)颖壳闭合不完全(裂壳)是杂交稻发芽率低的又一特殊原因。查得最高34%,最低4%,平均 In recent years, hybrid rice seed germination rate is low, farmers reflect strongly. After more than two years of research, the author accumulated more than 2,000 original data, which was initially identified by computer processing. At the same time, some countermeasures are put forward in a targeted way and applied to production to obtain significant economic benefits. First, the reasons (a) grain disease is hybrid rice seed germination rate is the primary factor. The test found that non-germinating seeds, the particles accounted for 73.78%. With the naked eye lesions can be seen as the degree of disease-free seeds and sick seeds germination rate difference of 37.70%. (B) glume incomplete closure (split shell) is another special reason for low germination rate of hybrid rice. Check up to 34%, minimum 4%, average