种子的发芽率是种子生活力的具体体现,是种子播种品质的一个关键性指标。种子发芽率高,则表示有生活力种子多,播种后出苗数多。通过抽样及室内检验分析发现:收获精选晒干后的杂交稻种存在严重裂颖现象,而常规稻种子的裂颖率一般很低,有的几乎无裂颖现象。针对不同品种裂颖粒所占比例及裂颖对发芽率的影响这两方面的问题,在室内做了下面两组试验,两组试验中的相同品种(组合) Seed germination rate is a concrete manifestation of seed vigor and is a key indicator of seed sowing quality. Seeds germination rate is high, then there are many viable seeds, seedlings after sowing more. Through sampling and laboratory tests, it was found that there was a serious cracking phenomenon in the hybrid rice after harvesting and drying, while the cracking rate of the conventional rice seeds was generally very low, and some were almost not cracked. In view of the different varieties of cracked grains and the proportion of cracked Ying on the germination rate of these two issues, the following two sets of tests indoors, the two varieties of the same test (combination)