干旱半干旱地区主要树种叶片水分利用效率研究综述

树种选择是干旱、半干旱地区森林植被恢复与重建的关键环节, 而水分利用效率(WUE)是表征树种抗旱性和水分利用特征的基本生理参数, 是目前树种选择研究中的一个热点和难点问题。文中在介绍树木叶片WUE概念和研究方法的基础上, 从树木叶片WUE在树种和生活型之间的差异和时空变化规律及其对光照、水分、温度、CO₂和O₃浓度等环境因子的响应等方面阐述了干旱、半干旱地区主要树种叶片WUE研究的进展情况, 指出目前树木叶片WUE研究中存在的问题及今后研究展望。

A Review on Leaf Water Use Efficiency of Major Trees Species in Arid and Semi-Arid Area

The tree specie selection is the critical part in the process of vegetation restoration and reconstruction in arid and semi-arid areas. As a reliable indicator of drought resistance and water use characteristics of tree species, water use efficiency (WUE) has become a hotspot in the research on tree specie selection. This paper introduced the concept and correspondingly research method of leaf WUE and summarized the research progress of leaf WUE in terms of the variation in leaf WUE between species, positions in the canopy, and characteristics of temporal and spatial variation, its influence on environmental factors like illumination, moisture, temperature, CO₂ and O₃ concentrations. Furthermore, it put forward the problems currently existing in the research and prospected the trend of future research on leaf WUE.