为研究浸种时间对凤丹(Paeonia ostii‘Feng Dan’)种子萌发的影响,测定了不同浸种时间下凤丹种子的上浮层和下沉层的露白率,吸水率,生活力和α-淀粉酶活性等指标。结果表明:随着浸种时间增加,吸水率呈现增加趋势;浸种2 d的下沉层种子的露白率与生活力最高,且均高于上浮层种子;α-淀粉酶活性在下沉层种子中高达93 U,上浮层种子最高活性仅为81 U,相同浸种时间下沉层种子α-淀粉酶活性更高。结论:凤丹种子的最佳浸种时间为2 d。 In order to study the effect of soaking time on the seed germination of Paeonia ostii’Feng Dan ’, the dew whitening rate, water absorption rate, viability and α-amylase Activity and other indicators. The results showed that with the increase of soaking time, the water absorption showed an increasing trend. The dew whitening rate and viability of the descendants were the highest in soaking seeds for 2 d, and both were higher than those in the ascending layer. The α-amylase activity was as high as that in the descending seeds 93 U, the highest activity of the floating layer seeds was only 81 U, the same seed soaking time seed layer α-amylase activity higher. Conclusion: The best soaking time for the seeds of Feng Dan is 2 d.