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| Accuracy and Error Sources of the Stem Heat Balance Method in Sap Flow Measurements |
| Li Shuang1,2, Xiao Honglang1, Wang Fang1, Zhou Maoxian1 |
1. Key laboratory of Ecohydrology of Inland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Currently, it has been very popular that using the heat balance technique to estimate transpiring water-consumption of desert plants in domestic. However, researches on accuracy and error sources of the stem heat balance method were rarely reported. This paper firstly introduced the theory of stem heat balance technique, and then according to research results about application of heat balance stem flow gauge, pointed out accuracy and error sources of stem heat balance in practical application.Finally, several suggestions were put forward for sap flow measurement of desert plants,including controlling effect of environment temperature on stem temperature, reasonably determining value of Ksh, clearing the changing processes of dT and Qs.Water is a main limiting factor for plant growth in arid and semi-arid region. Understanding water requirement and consumption regulation of desert vegetation could provide scientific basis for the category selection, distribution and management of vegetation in the process of ecological environment construction.
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Received: 13 October 2013
Published: 20 November 2014
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Corresponding Authors:
肖洪浪(Email:xhl@lzb.ac.cn)
E-mail: xhl@lzb.ac.cn
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2014, Vol. 34 
