多花黄精实生育苗及幼苗生物质积累规律分析

多花黄精苗播种育苗难度大,实生苗生物质积累规律尚待研究。笔者对其种子的发芽率、发芽势以及1~2年生苗进行跟踪观测。结果表明,多花黄精种子发芽率、发芽势均达80%以上,种子生活力强。该种子萌发周期长,部分植株于次年春季长叶。1年生苗属于先长根茎根系、再长叶片的生长发育类型;2年生苗叶片增长明显,其次是根系,再次是块茎,且2年生苗大多为单叶,仅有极少数为双叶或三叶。从第2年开始,地上叶片生长速度加快,但地下部分所占比例仍然较大,为全株的69%。表明随着叶片光合作用增强,黄精地下块茎生长优势越发明显。

Seedling Growth and Seedling Material Accumulation of Polygonatum cyrtonema

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.