Abstract:

The germination of Polygonatum cyrtonema seeds is difficult, while the law of dry matter accumulation of P. cyrtonema seedlings is still not clear. To investigate the reproduction of P. cyrtonema, the authors studied the seed germination rate, germination vigor and the mass growth from 1 to 2 year stage. The results show that the germination rate and germination vigor are both over 80%. The sprouting time is long and the leaves generally grow out in next spring. 1 year-old seedlings belong to the leaf early and root later style, whereas the 2 year-old seedlings mostly display one leaf, seldom with 2 or 3 leaves. From the second year, the leaves grow faster than the root and tuber, but the proportion of the underground part is still relatively large, the tube yield ratio is over 69%, indicating that the tuber grow faster as photosynthesis strengthens.

Key words: Polygonatum cyrtonema, germination rate, germination vigor, leaf, tube, root length