繁殖方式对矮慈姑生长的影响

INFLUENCES OF REPRODUCTIVE METHODS ON GROWTH OF SAGITTARIA PYGMAEA

摘要: 矮慈姑的种子繁殖和球茎营养繁殖对植株生物量和高度都有明显影响。种子繁殖苗生物量的增长曲线方程不同球茎繁殖苗的生物量增长曲线方程。从生物量比较可见:在生长初期, 球茎繁殖苗的生物量远大于种子繁殖苗。生长过程中, 种子繁殖苗的生长速率大于球茎繁殖苗。在生长后期, 二者生物量接近。种子繁殖苗的高度动态方程与球茎繁殖苗的高度动态方程也不一样。种子繁殖苗和球茎繁殖苗高度的增长速率在生长的前期均高于生长后期

Abstract: The corms in Sagittaria pygmaea is a form of vegetative reproduction and this species also produces seeds.The dynamics of biomass and length was studied.The results show that the biomass of corm shoots is far larger than seed shoots at the beginning of growth.The growth rate of seed shoots is higher than corm shoots.They hold the approximately same biomass in the end.The dynamics of length of S.pygmaea seed shoots and corm shoots can be described with equation.The increasing of length is slower at the end of growth than at the beginning.