Effect of Water Table Depth on Growth and Yield of Soybean Yudou 16
Publication: Journal of Hydrologic Engineering
Volume 18, Issue 9
Abstract
In 2005–2006, a multilysimeter study was conducted to determine the effect of various water table depths (WTDs) (0.2, 0.4, 0.6, 0.8, 1.0, 2.0, 3.0, 4.0, and 5.0 m) on the growth of soybean variety Yudou 16 in the transitional zone of northern semitropical and warm temperate climatic conditions of the Huaibei Plain, Anhui Province, China. In the experiment, precipitation was accounted for and WTD was controlled. The yield of Yudou 16 soybeans was greatest with a WTD of 2 m; yield decreased when the WTD was deeper or shallower than 2 m. From 0.2 through 2.0 m soybean yield increased rapidly with increasing WTD because shallow WTDs produced an oversupply of water in the root zone. From 2 through 5 m yield decreased slowly with increasing WTD under the experimental conditions. This was apparently because deeper WTDs could not compensate (through phreatic evaporation) for rainless periods of moisture stress during the growing season. When the constant WTD changes from 0.8 to 4.0 m, the yield is equal to or greater than the local field yield, with a variable WTD of 0.3 to 3.4 m. This suggested that field production could be improved if WTD were controlled to changing within 0.8 to 4 m. These results should help to guide more precise planning and efficient management of soybean cultivation in this region.
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Acknowledgments
This research was supported by a major program of the National Natural Science Foundation of China (51190091), the National Key Basic Research Program of China (2010CB951101), the National Natural Science Foundation of China (50939006), Scientific Research Foundation for returned overseas students, Innovative Research Team Project (2009585412), Special Basic Research Fund for Methodology in Hydrology (2009IM020104), the 111 Project (B08048), and Special Research Funds for Public Welfare (2008001). The authors are grateful to the reviewers. Their suggestions contributed significantly to the improvement of the manuscript.
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© 2013 American Society of Civil Engineers.
History
Received: Jun 25, 2010
Accepted: Jan 9, 2012
Published online: Aug 15, 2013
Published in print: Sep 1, 2013
Discussion open until: Jan 15, 2014
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