A better understanding of the multi-temporal variation in evapotranspiration (ET) at different crop growth stages is the key for determining a reasonable irrigation schedule. In this study, a new device known as ‘Water Transformation Dynamical Processes Experimental Device’ (WTDPED) was used to monitor ET for maize under controlled environmental and groundwater conditions, and the multi-temporal variations of ET considering the combined impact of environmental factors (air temperature (AT), relative humidity (RH)) and groundwater in homogeneous and layered soils were focused on. During the whole growing period, the ET peaked at 14:00–15:00 on a daily basis. The variation in daily ET followed a bell curve during the entire growing period. The 5-day ET reached its maximum during the 12th leaf and maturity stage. The correlation coefficient between ET and AT reached its maximum value of 0.70 during planting and the third leaf stage. The negative correlation coefficient between RH and ET reached its maximum during the 12th leaf and tasseling-silking stage. Groundwater recharge was positively correlated to ET and the daily contribution was up to 10.07%. The silt sandy loam–loam layered soil was favorable for water and nutrient uptake during the entire growing period of maize.
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Research Article|November 10 2016
Multi-temporal variation in water consumption of summer maize as determined by the Water Transformation Dynamical Processes Experimental Device
Yali Wu
Yali Wu
1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China2University of Chinese Academy of Sciences, Beijing 100049, China
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Xianfang Song
Xianfang Song
1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
E-mail: songxf@igsnrr.ac.cn
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Ying Ma
Ying Ma
1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Hongmei Bu
Hongmei Bu
1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Shengtian Yang
Shengtian Yang
3Beijing Normal University, Beijing 100875, China
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Dongmei Han
Dongmei Han
1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Yinghua Zhang
Yinghua Zhang
1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Hydrology Research (2016) 48 (5): 1268-1281.
Article history
Received:
January 06 2016
Accepted:
September 11 2016
Citation
Yali Wu, Xianfang Song, Ying Ma, Hongmei Bu, Shengtian Yang, Dongmei Han, Yinghua Zhang; Multi-temporal variation in water consumption of summer maize as determined by the Water Transformation Dynamical Processes Experimental Device. Hydrology Research 1 October 2017; 48 (5): 1268–1281. doi: https://doi.org/10.2166/nh.2016.021
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