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Experimental in var. pendula Hort Sap Flow with Heat Balance Technique

ZHANG Yun-ji et al (College of Geography and Resources Management of Ludong University,Yantai,Shandong 264025)  
The principle of packaged sap flow gauge in measuring stem flow flux was introduced and then it was used to measure the diurnal change stem sap flow of a typical locust tree.The relationship between diurnal change of stem sap flow with air temperature and diurnal accumulation of stem sap flow were analyzed,too.Results showed that the diurnal change of stem sap flow in daytime was variable,showing multi-peaks characteristics and relatively stable and in nighttime was with low value.Air temperature and accumulation of stem sap flow's diurnal change showed uniform trend with trunk stem sap flow.
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