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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。
The choice of tree species is a key step in the restoration and reconstruction of forest vegetation in arid and semiarid regions. Water use efficiency (WUE) is the basic physiological parameter to characterize the drought resistance and water use characteristics of tree species and is a hot and difficult issue in tree species selection . Based on the introduction of the WUE concept and research methods of tree leaves, the paper studied the differences and spatial and temporal changes of WUE between tree species and life forms and their responses to environmental factors such as light, water, temperature, CO2 and O3 concentrations In this paper, the progress of the WUE research on the main tree species in arid and semi-arid regions was expounded, and the existing problems in WUE research and the future research prospects were pointed out.