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本文对西双版纳季节雨林及橡胶多层林的凋落物量动态、各组分的季节变化规律、林地残留物现存量及其分解进行了研究 ,分析比较了两种群落的凋落节律。结果显示 :“双凋落峰”及“叶分解速率较枝分解更快”为两类群落的共有特征 ;森林凋落物量及凋落物分解速率则因群落类型而异 ,橡胶多层林年凋落物总量为 9.85± 0 .78t· hm- 2· a- 1,大于季节雨林的年凋落物总量 8.42± 0 .1 6t· hm- 2· a- 1,橡胶多层林凋落物的消失率常数为 2 .2 5,较季节雨林 ( 2 .0 )的大。本项研究对深入了解热带森林生态系统的结构功能及持续利用热带森林资源具有重要意义。
In this paper, the dynamics of litterfalls, the seasonal variations of the components, the existing stock of woodland residues and their decomposition were studied in the seasonal rainforest and rubber multilevel forests in Xishuangbanna. The litter rhythm of the two communities was analyzed and compared. The results showed that “double litter peak” and “leaf decomposition rate faster than the branches decompose” were the common characteristics of two communities. The amount of litterfall and litter decomposition rate varied with the type of community. The total amount of litter Was 9.85 ± 0.78 t · hm-2 · a-1, which was larger than that of the seasonal rainforest (8.42 ± 0.16 t · hm-2 · a-1). The rate of disappearance of litter was .2 5, Larger than the seasonal rain forest (2.0). This study is of great significance for understanding the structural functions of tropical forest ecosystems and for continuously utilizing tropical forest resources.