在福建小湖赤枝栲林中定点定位观测，研究赤枝栲林的蒸腾强度日变化，季节变化及影响蒸腾强度的生态因子.得出了赤枝栲的蒸腾系数为123.72g，年蒸腾耗水量965.73MM；赤枝栲蒸腾速率日变化为单峰，双峰形曲线，季节变化为夏季＞秋季＞春季＞冬季，与环境因子相关性显著.The daily and seasonal changes of transpiration intensity and their ecological Factors concerned with Castanopsis kawakamii Forest in Xiaohu region of Fujian were investigated at Fixed locations and positions.The daily changes of transpiration speed in C. kawakamii showed two types of curves with either a single or double peaks, and the seasonal change ranges tended to be summer>autumn>spring>winter.The eFFects of ecological Factors concerned on the transpiration of C. kawakamii varied with diFFerent seasons.The trranspiration coeFFicient of this Forest was 123.72, and the annual water consumption through transpiration was 55.72% of the precipitation, accounting For the important output of this ecological system of C. kawakamii Forest
