当归种子的生态学特性

当归种子在自然条件下，存放一年后，即失去发芽力，这一问题成为推广“立秋直播”新技术的严重障碍。为查明导致发芽力迅速下降的主要原因，探讨保持发芽力的有效措施，特对当归种子在自然条件下，发芽力的年变化，以及种子含水量(4—20%)、贮种温度(-10一33℃)和发芽温度(5—35℃)等对种子发芽力的影响进行了比较系统的试验分析。结果表明，当归种子属于“耐干藏种子类型”，高温和高湿是降低发芽力的主要因素。若将种子含水量降低到5—8%，并配合以较低的温度(15℃以下)，发芽力则可长达三年以上。在当归产区，若能改“常温堆藏法”为“低温、干燥、密闭贮存法”，便可达到妥善保存当归种子的目的。

Ecological Characteristics of Angelica sinensis Seeds

When Angelica sinensis seeds are stored over one year in the natural condition, it will lose its sprouting capacity. This problem is a serious obstacle to spread a new technology, "direct seeding in the beginning of autumn". In order to find out an effective measure keeping its sprouting capacity, the another has investigated the influence of moisture content in seeds (4—20%), and temperature in storing seeds (10—33 ℃)and sprouting temperature (5—35 ℃) on the sprouting capacity of seeds. The result indicated, that Angelica sinensis seeds belong to a seed type of patiently dry store. The high temperature and humidity are principal factors decreasing the sprouting capacity. If the moisture content in seeds is decreased to 5-8% combined to lower temperature below 15℃, the sprouting capacity maybe over three years long