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Open AccessArticle

Effect of Water Table Depth on Soybean Water Use, Growth, and Yield Parameters

1
Department of Agricultural and Biosystems Engineering, North Dakota State University, Fargo, ND 58108-6050, USA
2
Department of Soil Science, North Dakota State University, Fargo, ND 58108-6050, USA
3
Department of Plant Science, North Dakota State University, Fargo, ND 58108-6050, USA
*
Author to whom correspondence should be addressed.
Water 2019, 11(5), 931; https://doi.org/10.3390/w11050931
Received: 2 April 2019 / Revised: 22 April 2019 / Accepted: 26 April 2019 / Published: 2 May 2019
(This article belongs to the Special Issue Innovative Water Management and Reuse)
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Abstract

Water table contribution to plant water use is a significant element in improving water use efficiency (WUE) for agricultural water management. In this study, lysimeter experiments were conducted in a controlled greenhouse environment to investigate the response of soybean water uptake and growth parameters under four different water table depths (WTD) (30, 50, 70, and 90 cm). Soybean crop water use, WUE, and root distribution under the different WTD were examined. For 30, 50, 70, and 90 cm of WTD treatments, the average water table contributions were 89, 83, 79, and 72%; the grain yields were 15.1, 10.5, 14.1, and 17.2 g/lys.; and the WUEs were 0.22, 0.18, 0.25, and 0.31 g/lys./cm, respectively. Further analysis of the root mass and proportional distribution among the different soil layers illustrated that the lysimeters with 70 and 90 cm WTD had greater root mass with higher root distribution at 40–75 cm of the soil layer. The results indicated that 70 and 90 cm of constant WTD can yield higher grain yield and biomasses with greater WUE and better root distribution than the irrigated or shallow WTD treatments. View Full-Text
Keywords: lysimeter; evapotranspiration; water use efficiency; grain yield; root distribution lysimeter; evapotranspiration; water use efficiency; grain yield; root distribution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Fidantemiz, Y.F.; Jia, X.; Daigh, A.L.; Hatterman-Valenti, H.; Steele, D.D.; Niaghi, A.R.; Simsek, H. Effect of Water Table Depth on Soybean Water Use, Growth, and Yield Parameters. Water 2019, 11, 931.

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