文献类型：期刊文献

中文题名：树干液流对环境变化响应研究进展

英文题名：A review on water use responses of tree/forest stand to environmental changes by using sapflow techniques

作者：张雷[1] 孙鹏森[1] 刘世荣[1]

机构：[1]中国林业科学研究院森林生态环境与保护研究所

年份：2009

卷号：29

期号：10

起止页码：5600-5610

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家"十一五"科技支撑计划资助项目(No.2006BAD03A0401);国家科技部重大基础研究计划资助项目(2002CB111504);国家自然科学基金资助项目(30471383;30590383);国家林业局森林生态环境重点实验室基金资助项目

语种：中文

中文关键词：液流;水分利用;蒸腾;环境变化

外文关键词：sapflow; water use; transpiration; environmental changes;

分类号：Q142;Q948

摘要：随着大气中CO2浓度和其它温室气体的上升,预计全球和区域尺度的温度会增加,由于增温导致地球上一些地区降水增加,一些地区可能面临干旱的加剧。要分析气候、环境变化对植被的影响,需要深入了解植被和大气之间能量、水汽和CO2交换,蒸腾是这个交换过程的一个重要组成部分,是水分和能量离开森林生态系统的主要途径。目前,树干液流测定技术已经发展得比较成熟,能比较可靠的估计整树蒸腾,逐步被应用于研究树木水分利用对环境变化的响应。介绍比较成熟的树木(林分)蒸腾估算方法,就树木(林分)水分利用对环境变化响应研究中的几个热点问题进行了总结:(1)大气中CO2浓度升高对树木水分利用、气孔导度和冠层结构的影响,环境条件决定树木水分利用对CO2的响应幅度。(2)树木蒸腾对降雨的响应类型,降雨格局改变导致的土壤干旱对林分蒸腾的影响。(3)树体储存水的生理意义。随着液流技术的发展和推广,其作为一种科学研究的技术与手段将会受到更多学者的重视,也必将推进树木水分利用对环境变化响应的研究。
Predicted changes in global and regional climate resulting from increasing atmospheric CO2 concentrations and other greenhouse gases have raised concerns about the likely impacts of precipitation and temperature on plant water use.Understanding effects of environmental changes on vegetation needs to explore the mechanism of the exchanges of energy,water vapour and CO2 between vegetation and the atmosphere.Transpiration is an important component of this exchange for it＇s the major pathway for both water and energy leaving the forest ecosystem.At present,sapflow techniques are being increasingly used to monitor tree responses to rapid changing environment instantly and continuously.It demonstrates a reliable and accurate approach to study tree water use in changing environment.In this paper,the methods of scaling sapflow from tree to stand are firstly summarized,then key research progress on tree/stand water use in response to environmental changes by sapflow measurements is reviewed,coving：（1） Effects of elevated CO2 concentration on tree/stand water use,stoma conductance and crown structure.Effects of environmental factors on tree/stand water use under elevated CO2 concentration.（2） Response patterns of tree transpiration to rainfall event,stand transpiration response to water stress through the throughfall exclusion experiments（3） Physiological meanings of stem water storage.Sapflow techniques will be still the main methods in studying plant water relationship in future for scientists due to their simplicity,high accuracy and reliability,and relatively low cost.