热带森林不同生长时期的小气候特征

A Preliminary Study on Microclimate in the Process of the Different Growth Phases of Tropical Forest

利用西双版纳热带森林生长循环过程不同时期 (林窗期、建群期、成熟期 )干热季小气候观测资料 ,探讨了热带森林不同时期森林群落的小气候特征。结果表明 ,在干热季 ,不同森林群落的小气候与旷地存在显著差异 ,森林具有显著的降温增湿效应。由于不同生长时期森林的生物群落结构不同以及郁闭度和热力性质等的差异 ,导致不同森林群落的降温增湿作用不尽相同 ,各小气候要素随时间变化状况也存在差异 ,这将对不同生长时期森林群落的植物生长。

In dry hot season,microclimatic measurements were conducted in the process of the different growth phases (gap phase, building phase and mature phase) of tropical forest in Xishuangbanna. The microclimatic characteristics of different growth phases of tropical forest were discussed in this paper.The results indicated that in dry hot season, there was a distinct microclimatic difference between forest in different growth phases and open field. There had a significant effect on reducing air temperature and improving moisture in the interior forest.Due to the differences of community structure, canopy density and thermal character in different growth phases of tropical forest,the effect of reducing air temperature and improving moisture was different and state of microclimatic factors was also different with temporal variation, which would influence on growth and development of vegetation in different growth phases of forest. This study presents a research basis for discussing mechanism of regeneration,biodiversity of forest community and improving the utilization ratio of all kinds of environmental factors by forest.