Abstract: It was studied the traditions and changes of natural resources utilization in A Dai village in Xishuangbanna China.① The Dai people in Mandan village suffered seriously from the establishment of reservoir and nature reserve but they harmonized with the nature and found the suitable approaches to develop.② They planted cash plants in the fallow fields,protected natural forests to develop medicine plants(Amomum villusa),promoted their traditional pickled fish,and cultivated winter crops on flood areas of the reservoir during dry seasons,making the forest conservation and economic sustainable development be possible.③ The gentle and beautiful environment and honest folk customs benefited the villagers by the development of rural eco-tourism besides their traditional cultivation and collection.④ The authors finally suggested that the great attentions should pay to the traditional styles of natural resources use and the key roles of indigenous people when policies for development and conservation were been making.

Key words: eddy covariance technique, energy balance, net radiation, sensible heat flux, latent heat flux.