摘要
介绍了各种热技术测定树干边材液流的基本原理和方法,并对热技术在树干水分运输格局、影响和调节树干边材液流的内外因素、基于树干液流测定值推算林分冠层导度和尺度放大以及夜间树干液流等方面研究中的具体应用进行了综述。目前,在运用各种热技术对林木树干液流的研究中,树干水分运输格局还需借助其他手段和方法进一步准确测定和佐证;影响树木边材液流内外因素的协同和补偿作用还需系统研究;基于热技术测定的树干液流值进行耗水时空尺度的扩大将成为该领域的研究热点之一。
This paper summarized the principles and methods of thermal technique and its application in studying stern sap flow, such as water transportation pattern of stem, internal and external factors affecting and regulating the sap flow, calculating the canopy stomatal conductance based on the sap flow value, scaling up in space-time, and sap flow on nighttime. It was concluded that further researches of stem sap flow using thermal techniques could be enhanced, including real water movement and transformation pat- tern in stem assistant with other means, cooperation and compensation function on the internal and external factors affecting the sap flow, as well as the scaling up in tree water consumption based on the sap flow value by thermal technique.
出处
《西北林学院学报》
CSCD
北大核心
2008年第3期94-100,共7页
Journal of Northwest Forestry University
基金
国家自然科学基金(30371147)
北京市自然科学基金(6052016)
国家“十一五”科技支撑计划课题(2006BAD32B02)
关键词
热技术
树干边材液流
林木耗水
therma technique
stem sap flow
water consumption
