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[1]ZHANG Wei-qiang,HE Kang-ning,DENG Jun-tao,et al.Comparison on the Transpiration Values Measured with Portable Steady Porometer Method and Whole-tree Weighing Method[J].Research of Soil and Water Conservation,2007,14(06):192-194.

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Comparison on the Transpiration Values Measured with Portable Steady Porometer Method and Whole-tree Weighing Method

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 14 Number of periods: 2007年06期 Page number: 192-194 Column: Public date: 1900-01-01

Title:: Comparison on the Transpiration Values Measured with Portable Steady Porometer Method and Whole-tree Weighing Method

Author(s):: ZHANG Wei-qiang¹, HE Kang-ning², DENG Jun-tao³, ZHONG Xi-jun¹, LI Zhao-qing¹; 1. Forest Research Institute of Guangdong Province, Guangzhou 510520, China;
2. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
3. Pearl River Water Resource Commission, Guangzhou 510520, China

Keywords:: portable steady porometer method; whole-tree weighing method; transpiration rate; semi-arid region of Loess Plateau

CLC:: S718.3

DOI:: -

Abstract:: Transpiration rate of Platycladus orientalis, Pinus tabulaeformis, Robinia pseudoacacia and Hippophae rhamnoides were measured by portable steady porometer (Li-1600) and whole-tree weighing method (BP-3400) in growing season of 2004, artificially controlling water amount in pot experiment, in semi-arid region of the Loess Plateaus.It indicated that transpiration rate of leaves rose when soil water content increased; measured value of portable steady porometer were always higher than measured value of whole-tree weighing, the ratios of measured value of two methods rose with increasing soil water content, but reduced when soil water content reached field moisture capacity; the ratios of measured value of portable steady porometer and whole-tree weighing of Robinia pseudoacacia and Hippophae rhamnoides was 2.50 and 2.57 respectively in July, the ratios of measured value of portable steady porometer and whole-tree weighing of Platycladus orientalis and Pinus tabulae formiswas 2.48 and 2.28 respectively in August, the ratios of measured value of portable steady porometer and whole-tree weighing method of Platycladus orientalis, Pinus tabulaeformis, Robinia pseudoacacia and Hippophae rhamnoides was 1.19, 1.86, 1.53 and 1.97 respectively in October.The conclusion would be regarded as the reference of forest tree transpiration in semi-arid region of Loess Plateau.

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Last Update: 1900-01-01