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本文以林缘为中心，研究了西双版纳地区３个热带干性季节性雨林片断和１个同样植被类型的连续森林林内至林外样带上小气候要素水平梯度分布。结果表明，热带雨林片断林缘对温度、相对湿度和光照的影响范围北向林缘伸至林内１５ｍ、南向林缘伸至林内２５ｍ。林外小气候水平梯度大于林内，这种梯度变异尤以林缘附近（－１０～１０ｍ范围）最大。热带雨林片断后，林内与林外之间的小气候环境差异和对林外气候变化的缓冲作用都明显减弱。本文还给出了温度和湿度随水平距离变化的线性关系，并探讨了小气候边缘效应对群落结构、物种分布的影响。
In this paper, we studied the horizontal gradient distributions of three microclimate elements in three tropical dry seasonal rainforests and one continuous vegetation with the same vegetation type in Xishuangbanna. The results showed that the influence of temperature, relative humidity and light on the edge of tropical rain forest reaches 15m in the forest margin and 25m in the forest margin. The gradient of microclimate outside the forest is greater than that inside the forest. This gradient variation is especially near the edge of the forest (-10 ~ 10m range). After the tropical rain forest fragments, the microclimate differences between the forest and the forest and the buffer effect on the climate change outside the forest have obviously weakened. The paper also gives the linear relationship between temperature and humidity with horizontal distance and discusses the influence of microclimate marginal effect on community structure and species distribution.