Plateau Meteorology

Plateau Meteorology >

2015 , Vol. 34 >Issue 4: 1095 - 1106

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00114

Analysis on Evapotranspiration of Maize Field Measured by Lysimeters in Huailai

  • YANG Guangchao ,
  • ZHU Zhongli ,
  • TAN Lei ,
  • LIU Shaomin ,
  • XU Ziwei ,
  • BAI Junhua ,
  • XIAO Qing
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  • State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China;2. Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences, Beijing 100094, China

Received date: 2014-01-28

  Online published: 2015-08-28

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Abstract

Based on the measurements of lysimeter, eddy covariance(EC) and automatic weather station(AWS) in Huailai Remote Sensing Experiment Station in 2012 and 2013, the daily and seasonal variation of soil evaporation and maize field evapotranspiration have been analyzed. The relationship between field evapotranspiration and meteorological factors(net radiation, air temperature, air humidity, and wind speed), soil moisture has been studied through multiple regression analysis method. Comparison has been made between the evapotranspiration measured by lysimeter and EC. The result shows that the daily variation curves of soil evaporation were quite consistent with maize field evapotranspiration, while seasonal differences were obvious. In the region of Huailai, net radiation and soil moisture obviously correlated with daily evapotranspiration, while other factors did not obviously correlated. Lysimeter's representativeness was significantly affected by the growth of the crops within it. The correlativity between evapotranspiration measured by EC and that by lysimeter is very good. The value of lysimeter is 10.5% higher than that of EC. As heat can not be exchanged between the soil in lysimeter and the soil outside, the average temperature of the soil in the lysimeter is 9.5% higher than that of the field outside. As a result, the evapotranspiration of lysimeter is relatively larger.

Key words： Lysimeter; Eddy Covariance Syst; Evapotranspiration; Meteorological Facto

Cite this article

YANG Guangchao , ZHU Zhongli , TAN Lei , LIU Shaomin , XU Ziwei , BAI Junhua , XIAO Qing . Analysis on Evapotranspiration of Maize Field Measured by Lysimeters in Huailai[J]. Plateau Meteorology, 2015 , 34(4) : 1095 -1106 . DOI: 10.7522/j.issn.1000-0534.2014.00114

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