用分期采收的山楂种子进行层积处理和萌发试验，并对其内源抑制物质进行生物测定。结果表明，成熟的种子经１８０ｄ低温层积不能萌发，而提早３０ｄ采收则萌发率可达３２％。萌发率高者抑制物质含量少。 Stratified treatment and germination test were carried out on the hawthorn seeds harvested by staging, and their endogenous inhibitory substances were bioassayed. The results showed that mature seeds could not germinate after 180 days of low temperature stratification, but the germination rate could reach 32% as early as 30 days after harvesting. High germination rate of substances with less inhibition.