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Article

Water Use Efficiencies of Different Maturity Group Soybean Cultivars in the Humid Mississippi Delta

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USDA-ARS, Sustainable Water Management Research Unit, P.O. Box 127, Stoneville, MS 38776, USA
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USDA-ARS, Crop Production Systems Research Unit, P.O. Box 350, Stoneville, MS 38776, USA
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Author to whom correspondence should be addressed.
Academic Editor: Alejandro Pérez-Pastor
Water 2021, 13(11), 1496; https://doi.org/10.3390/w13111496
Received: 9 April 2021 / Revised: 18 May 2021 / Accepted: 25 May 2021 / Published: 27 May 2021
(This article belongs to the Special Issue Optimization of Water Use in Agricultural Systems)
Introducing alternative cultivars with enhanced water use efficiencies can help alleviate pressure on groundwater for crop irrigations in Mississippi (MS) Delta. A two-year field study was conducted in 2019–2020 to compare the water use efficiencies (WUE) of recently released and pre-released soybean {Glycine max (L.) Merr.} cultivars in maturity group (MG) III (‘P37A78’, ‘LG03-4561-14’), IV (‘Dyna-gro 4516x’, ‘DS25-1, DT97-4290’), and V (‘S12-1362’, ‘S14-16306’) in the MS Delta. The experimental design was a split-plot with cultivar as the first factor and the second factor was water variant irrigation (IR) and no irrigation (RF, rainfed), replicated three times. The MG IV cultivar Dyna-gro 4516x recorded the highest grain yield and WUE: grain yields were 4.58 Mg ha−1 and 3.89 Mg ha−1 under IR and RF, respectively in 2019, and 4.74 Mg ha−1 and 4.35 Mg ha−1 in 2020. The WUE were 7.2 and 6.9 kg ha−1 mm−1, respectively, in 2019 under IR and RF, and 13.4 and 16.9 kg ha−1 mm−1 in 2020. The data reveals that ‘Dyna-gro 4516x’ (MG IV), ‘LG03-4561-14’ (MG III), and ‘P37A78’ (MG III) are best adapted to the early soybean production system (ESPS) in MS Delta region for sustainable production for conserving water resources. View Full-Text
Keywords: soybean maturity group; grain yield; leaf area index; water use efficiency; irrigation soybean maturity group; grain yield; leaf area index; water use efficiency; irrigation
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MDPI and ACS Style

Pinnamaneni, S.R.; Anapalli, S.S.; Fisher, D.K.; Reddy, K.N. Water Use Efficiencies of Different Maturity Group Soybean Cultivars in the Humid Mississippi Delta. Water 2021, 13, 1496. https://doi.org/10.3390/w13111496

AMA Style

Pinnamaneni SR, Anapalli SS, Fisher DK, Reddy KN. Water Use Efficiencies of Different Maturity Group Soybean Cultivars in the Humid Mississippi Delta. Water. 2021; 13(11):1496. https://doi.org/10.3390/w13111496

Chicago/Turabian Style

Pinnamaneni, Srinivasa R., Saseendran S. Anapalli, Daniel K. Fisher, and Krishna N. Reddy 2021. "Water Use Efficiencies of Different Maturity Group Soybean Cultivars in the Humid Mississippi Delta" Water 13, no. 11: 1496. https://doi.org/10.3390/w13111496

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