Evapotranspiration and crop coefficient of Populus euphratica Oliv forest during the growing season in the extreme arid region northwest China
Evapotranspiration and crop coefficient of Populus euphratica Oliv forest during the growing season in the extreme arid region northwest China
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DOI：
10.1016/j.agwat.2009.09.022
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发表时间：
2010-02
影响因子：
6.7
通讯作者：
Lan-gong Hou;Haixia Xiao;J. Si;S. Xiao;Maoxian Zhou;Yuan-gen Yang
中科院分区：
文献类型：
--
作者：
Lan-gong Hou;Haixia Xiao;J. Si;S. Xiao;Maoxian Zhou;Yuan-gen Yang
Based on successive observation, fifteen-day evapotranspiration (ETc) of Populus euphratica Oliv forest, in the extreme arid region northwest China, was estimated by application of Bowen ratio-energy balance method (BREB) during the growing season in 2005. During the growing season in 2005, total ETcwas 446.96mm. From the beginning of growing season, the ETcincreased gradually, and reached its maximum value of 6.724mmd−1in the last fifteen days of June. Hereafter the ETcdropped rapidly, and reached its minimum value of 1.215mmd−1at the end of growing season. The variation pattern of crop coefficient (Kc) was similar to that of ETc. From the beginning of growing season, the Kcvalue increased rapidly, and reached its maximum value of 0.623 in the last fifteen days of June. Afterward, with slowing growth of P. euphratica, the value dropped rapidly to the end of growing season. According to this study, the ETcof P. euphratica forest is affected not only by meteorological factors, but by water content in soil.
