北京山区几种木本植物蒸腾作用特征的研究

对北京山区落叶阔叶林几种木本植物蒸腾速率进行了一个生长季的连续测定，结果表明：影响植物蒸腾速率的因子主要是气孔阻力、光照强度、叶面温度、叶室温度、大气相对湿度．根据结果分析：树种不同，因子作用大小存在差异，主要影响因子不同，如山杏蒸腾速率的影响因子主要是温度和大气相对湿度．对辽东栎、山杏、大叶白蜡和核桃楸4种北京山区落叶阔叶林优势种叶片气孔阻力和蒸腾速率相关关系的分析结果显示，蒸腾速率和气孔阻力之间是一种非线性关系。

The transpiration feature of some woody plants in Mountain Area of Beijing

In all growth season, we measured the transpiration rate (Tr) of some woody plants in deciduous broad-leaved forest in Beijing Mountain zone. The results showed the major factors to affect transpiration of plants are stomatal resistance (Rt), solar radiation, leaf temperature, chamber temperature and relatively humidity. Because of species characteristics, the effect factors to transpiration have some difference to different species. According to analysis the relationship between transpiration and stomatal resistance of Quercus liaotungensis, Prunus var. ansu, Fraxinus rhynchophylla and Juglans mandishurica, the results indicate there is no-linear relationship. The equation are following: T_(r Quercus liaotungensis)=10.0-4.7ln(R_t);T_(r Prunus var. ansu)=11.0-5.67ln(R_t);T_(r Fraxinus rhynchophylla)=10.6-4.67ln(R_t);T_(r Juglans mandishurica)=6.79-2.26ln(R_t).