<正>采用多元回归分析和灰色关联分析方法，探讨了下蜀次生栎林蒸腾强度与生态因子的相关关系；并采用曲线积分的方法对林分蒸腾量作了估测。结果表明影响蒸腾强度的主要生态因子是温度和净辐射；其次是空气相对湿度和土壤热流通量；风速和土壤含水率的影响很小。次生栎林１９９６年总蒸腾量为４２８．８８ｍｍ；总蒸发散量为８５８．６８ｍｍ，占全年总降雨量的６８．８５％。研究结果为进一步阐明次生栎林的结构和功能提供了理论基础。

The correlation between environmental factors and transpiration intensity, the total transpiration and evapotranspiration of the secondary oak stands were studied in this paper. The results show: The major environmental factors affecting transpiration intensity are the net radiationthe air temperature respetively. The relative humidity and the soil heat fluxes are the second. The wind velocity and the average water capacity of soil are unremarkable. In the all growing season, the transpiration of Quercus variabilis is 380.46mm, and that of Liquidambar Formosana is 48.42mm. The total transpiration of the secondary oak stand amounted for 428.88mm. The total evapotranspiration of the secondary oak stand is 825.68mm,which make up 68.85 percent of the precipitation in 1996.