浙江天童常绿阔叶林香港黄檀的生态适应特征和行为

通过对芽的类型和活动、攀援茎的形态、径级分布和格局、攀援能力和立体结构及其与支持木关系的测定分析，探讨了香港黄檀的生态适应特征和行为。结果如下：①芽按活动时间分为春芽和夏芽；两类芽均可形成长枝(攀援枝)或短枝，但在活动持续时间和抽生攀援的长度方面存在明显差异；林内不定芽(主要为春芽)的活动和适应生长是老藤更新的重要途径。②攀援枝的节数和节间长度分别为短枝的7倍和6．5倍，而且易受光照等条件的影响；林缘攀援枝的分枝率是林内的5倍。③径级分布反映出种群随群落演替而老化，香港黄檀属群落早期藤本。互对支持木种类表现出一定的选择性，马尾松是其中被攀援最多的支持木，这主要与香港黄檀的生理、生长要求和马尾松枝型特点等有较大的关系。⑤具有较强的攀援能力，单株在群落中平均可攀援乔木层大树j株，最多可达15株，水平扩展面积平均为54m^2，最大可达260m^2；藤本通过攀援与支持木形成的空间结构，构成群落的特殊层片，其群落学意义值得进一步研究。

Adaptive characteristics and behavior of Dalbergia millettii liana in subtropical evergreen broad-leaved forest of eastern China

Based on analysis of types and dynamics of buds,morphology and space structure of branches,the ecological adaptation and behavior of Dalbergia millettii liana in the subtropical evergreen broad leaved forest of eastern China were studied.The results are as follows:(1)Both spring bud and summer bud may form the climbing or short branch,but there are great differences in the activity duration of bud and the branch length formed.Regeneration of old liana trunk will be mainly completed by adaptive growth o...