Evaluation of the sap flow using heat pulse method to determine transpiration of the Populus euphratica canopy |
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| Authors: | Xiaoyou Zhang Ersi Kang Maoxian Zhou |
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| Institution: | (1) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China |
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| Abstract: | The sap flow of the sampled Populus euphratica stems at different radial depths and directions had been studied in Ejina Oasis, in the lower reaches of the Heihe River.
Based on sap flow measurements, the transpiration of the entire canopy was calculated. Results showed a linear correlation
between the sap flow and the sapwood area of the P. euphratica. Through the analysis of the diameter at breast height in the sample plot, it was found that the distribution of the diameters
and the corresponding sapwood area was exponentially correlated, with the coefficient of correlation being 0.976,7. The calculated
transpiration of the Populus euphratica canopy was 214.9 mm based on the specific conductivity method.
Translated from Scientia Silvae Sinicae, 2006, 42(7): 28–32 译自: 林业科学] |
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| Keywords: | Populus euphratica sap flow transpiration of the canopy |
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