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对西双版纳片断望天树 (Shorea chinensis)林林缘小气候的季节、水平变化进行了观测研究 ,对比分析了 4个不同大小雨林斑块 (30 hm2 、2 5 hm2 、2 0 hm2 、3 hm2 )的小气候边缘效应。结果表明 :各雨林斑块林缘均存在明显的小气候边缘效应 ,其中在干季晴天最为明显 ,且在两个较小斑块林缘出现最高气温及气温日较差高于林外的现象 ;干季 ,部分林缘小气候要素 (最高气温、总辐射、净辐射、最小相对湿度 )林缘与林内的差值均是高于或大于雨季的相应值 ,而地表最高温林缘与林内的差值则是雨季强于干季 ;各斑块相比 ,小气候边缘效应波及林内的深度在最大斑块达到最浅 (2 5 m ) ,而在最小斑块达到最深 (35 m) ,呈现出小气候边缘效应及其影响深度随片断雨林斑块面积减小而增强及向林内进一步延伸的趋势。
The seasonal and horizontal variations of the microclimate of the forest margin of Shorea chinensis in Xishuangbanna were observed and studied. The comparative analysis was made on the seasonal and horizontal changes of the microclimate of four forests of different sizes (30 hm 2, 25 hm 2, 20 hm 2 and 3 hm 2) Microclimate edge effect. The results show that there are obvious edge effects of microclimate on each edge of rainforest patches, most notably on sunny day in dry season, and the maximum temperature and the temperature difference on day are higher than those on the edge of two adjacent patches. In the dry season, the differences between the marginal and intracranial elements of some forest marginal factors (maximum temperature, total radiation, net radiation, minimum relative humidity) were higher or greater than the corresponding values in the rainy season, while the difference between the maximum forest temperature and the forest Compared with the dry season, the rainy season is stronger than the dry season. The marginal effect of microclimate affects the depth of the forest reaching the shallowest (25 m) at the largest patch and the deepest (35 m) at the smallest patch, showing a microclimate The edge effect and its influence depth increase with the decrease of the patch area of the forested rainforest and further extend to the forest.