成熟的紫云英种子种皮坚硬，结构致密，表面覆有蜡质，不透水，具有休眠特性。在自然条件下，一般要到９月份才能萌发成苗。利用紫云英种子这一特性，可在紫云英生长至有一定种子量时，翻埋入土，存种于土壤，待秋后休眠解除，自然萌发成苗，周而复始，达到一次播种多年繁殖利 Mature aspartame seed coat hard, dense structure, covered with waxy surface, impervious, with sleep characteristics. Under natural conditions, germination usually takes place until September. The use of the characteristics of the milk vetch seedlings, milk vetch can grow to a certain amount of seed, buried buried soil, stored in the soil, to be released after the fall dormancy, natural germination into seedlings, go round and start again, reaching a sowing years of breeding