Evaluation of Silage Corn Yield Gap: An Approach for Sustainable Production in the Semi-Arid Region of USA

Abdelaziz Nilahyane, M. Anowarul Islam, Abdel O. Mesbah and Axel Garcia y Garcia
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Abdelaziz Nilahyane: Department of Research Centers, Montana State University, Eastern Agricultural Research Center, Sidney, MT 59270, USA
M. Anowarul Islam: Department of Plant Sciences, University of Wyoming, Department 3354, 1000 E. University Ave., Laramie, WY 82071, USA
Abdel O. Mesbah: Agricultural Science Center, New Mexico State University, Clovis, NM 88101, USA
Axel Garcia y Garcia: Department of Agronomy and Plant Genetics, University of Minnesota, Southwest Research and Outreach Center, Lamberton, MN 56152, USA

Sustainability, 2018, vol. 10, issue 7, 1-14

Abstract: Water and nitrogen (N) play an important role in closing the yield gap of crops by reducing associated stresses and yield variability. Field research data coupled to the CSM-CERES-Maize model of Decision Support System Agrotechnology Transfer were used to advance our understanding of the effect of water and N on silage corn growth and yield. The objectives of the study were to determine: (i) the best combination of irrigation water and N for optimum biomass yield, and (ii) the yield gap of silage corn grown at different locations in Wyoming, USA. Field experiments were conducted under sub-surface drip irrigation using a randomized complete block design in a split-plot arrangement with four replications. The main plot was irrigation and consisted of 100% crop evapotranspiration (100ETc), 80% (80ETc), and 60% (60ETc), and the sub-plot was N rates, including 0, 90, 180, 270, and 360 kg N ha −1 as urea-ammonium-nitrate. The simulated results indicated full irrigation and at least 150 kg N ha −1 as the best combination for silage corn production in Wyoming. Our observed and simulated results show the potential to increase the biomass and reduce the yield gap of silage corn in the region if irrigation water and N are properly managed.

Keywords: irrigation; nitrogen; corn; silage (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (2)

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