一、引言豆科作物种子一般都有硬实,有的硬实率高达90%以上,严重影响了种子发芽率和出苗率。由于硬实不透水或吸水较晚,播种后不出苗或出苗晚,影响出苗整齐度,出现缺苗断垄现象。如能探明硬实形成的原因,设法减少种子硬实率,无疑是可以节约用种,提高出苗整齐度,提高经济价值。对此,本文从环境条件和遗传方面对豆科植物种子硬实率高低的影响作初步探讨。 I. INTRODUCTION Leguminous crops generally have hardwood seed, and some hard-solid rate as high as 90%, seriously affecting the seed germination rate and emergence rate. As the hard water or water impervious later, after sowing or emergence of late emergence, affecting the uniformity of emergence, lack of seedlings off ridge phenomenon. If you can find out the reasons for the formation of hard, try to reduce the rate of seed hard, it is undoubtedly possible to save seeds, improve emergence uniformity, improve economic value. In this regard, this article from the environmental conditions and genetic aspects of the impact of the level of seedless hardwood of legumes for preliminary study.