应用热技术研究树干液流进展

摘要/Abstract

摘要： 综述了热技术方法测定树干液流的基本原理和不同适用范围.通过各种热技术方法可以确定树干水分运输格局及其数量;与树木生理指标和环境因素联合测定,可深入分析整树水分导度、气孔导度、边界层导度、水势及树干储水与树木蒸腾之间的关系,探讨树干液流受外界环境因素影响程度及其响应,揭示树木蒸腾内在的调节机制和外在影响因素;热技术可用于长期连续测定地带性森林主要树种蒸腾耗水特征,为正确评价森林的水文效应提供技术支持.

关键词: 热技术, 树干液流, 蒸腾

Abstract: This paper reviewed the principles of heat technique and its application in studying stem sap flow.Heat technique combined with determinations of tree physiological items such as whole-tree hydraulic conductance,stomatal conductance,water potential,and stem water storage can make us deeply analyze the regulation mechanism of tree transpiration,and approach the effect of environmental conditions on stem sap flow and its response.In addition,this technique can be also used for a long-term measurement of the hydrological characters of zonal forest stands,which will give a powerful technical support in properly assessing the hydrological effect of forest.

Key words: Heat technique, Stem sap flow, Transpiration

中图分类号:

Q948
S718

孙慧珍, 周晓峰, 康绍忠. 应用热技术研究树干液流进展[J]. 应用生态学报, 2004, (6): 1074-1078.

SUN Huizhen, ZHOU Xiaofeng, KANG Shaozhong . Research advance in application of heat technique in studying stem sap flow[J]. Chinese Journal of Applied Ecology, 2004, (6): 1074-1078.

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