紫云英是我国水稻产区的主要绿肥作物.研究其硬粒特性,对大面积绿肥生产,种子品质检验,以及种子的生理理论探讨,都具有重要意义.1973年以来,我们对紫云英种子硬粒特性进行了初步研究一、紫云英种子硬粒的时间性.紫云英种子硬粒具有严格的时间性,初收获的种子绝大多数处于硬粒状态,经一定时间贮藏,便自然解除,从而形成明显的硬 Astragalus sinicus is the main green manure crop in rice producing areas of our country.It is of great significance to study the characteristics of hard grains and to investigate the production of large-area green manure, the test of seed quality and the physiological theory of seeds.After 1973, First, the characteristics of seed hard particles First, the timeliness of the hard seed of Astragalus sinicus seed hard particles with strict timeliness, the first harvest of the vast majority of the seeds in the dough state, after a certain period of storage, then Naturally lifted, thus forming a clear hard