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[1]QIANG Xiao-man,CAI Huan-jie,ZHOU Xin-guo,et al.Experimental Study on Variation of Canopy-air Temperature Difference and Transpiration Rate of Alfalfa[J].Research of Soil and Water Conservation,2009,16(03):212-215.

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Experimental Study on Variation of Canopy-air Temperature Difference and Transpiration Rate of Alfalfa

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 03 Page number: 212-215 Column: Public date: 2009-06-20

Title:: Experimental Study on Variation of Canopy-air Temperature Difference and Transpiration Rate of Alfalfa

Author(s):: QIANG Xiao-man^1,2, CAI Huan-jie¹, ZHOU Xin-guo², ZHANG Xu-dong³; 1. Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Farmland Irrigation Research Institute, CAAS, Xinxiang, He’nan 453003, China;
3. College of Water Resource, Shenyang Agricultural University, Shenyang 110161, China

Keywords:: alfalfa; canopy-air temperature difference; transpiration rate

CLC:: S161.4;S542.4

DOI:: -

Abstract:: This paper mainly studied the variation of canopy-air temperature difference and transpiration rate of alfalfa under different water conditions. The results showed that the change law is basically identical of canopy-air temperature difference and transpiration rate in the whole growth period, and there are ‘M’ model in the typical day for the shape of the diurnal variation curve. The canopy-air temperature difference is negative and that diurnal variation curve is basically identical with transpiration rate’s under full irrigation, while the canopy-air temperature difference is positive, the transpiration rate is lower and the variation is smoother with larger deficit. Transpiration rate increases with the increase of canopy-air temperature difference when it is smaller and the transpiration rate decreases when canopy-air temperature difference is greater than 0℃.

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