常绿阔叶林内和林窗中栲树的种子萌发和幼苗生长

Seed Germination and Seedling Growth of Castanopsis fargesii in Evergreen Broadleaved Forest and in Gaps

摘要:

对浙江天童地区常绿阔叶林林窗和林内两种生境下人工播埋的栲树（Castanopsis fargesii）种子的萌发和当年幼苗的生长进行了研究。在林窗和林内两种生境的栲树种子（单粒重约0.5-0.6 g）的萌发率没有明显的差异,分别为31.7±7.1％和33.3±2.l％,一年龄幼苗的平均株高在生长季末分别为 6.56±1.2 cm和 5.88±1.09 cm,两者有明显差异,而平均叶长、平均叶宽以及平均根长等指标没有差异;幼苗的生物量也没有明显差异。但一年龄幼苗在生长过程中,其生物量分配有所变化,在林窗条件下,幼苗逐渐将较多的生物量分配于根,而林内幼苗则逐渐将生物量较多地分配于叶,生物量的分配反映出幼苗在不同生境下的适应性特征。

Abstract:

The seeds of Castanopsis forgesii from evergreen broadleaved forest in Tiantong National Forest Park in Zhejiang Province were collected and embedded in the forest and in gaps to investigate seed germination and the growth of the seedlings. Germination rates of the seeds under forest and in gaps were 33.3±2.l％ and 31.7±7.1％, respectively, showing no obvious difference in the two habitats. Mean heights of one-year-old seedlings were 5.88±1.09 cm and 6.56±1.2 cm, respectively, showing that the difference was obvious．Biomass allocation of the seedlings in the gaps tended to be more in the roots，while those under forest was more in leaves.