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Research ArticleResearch Section

Ammonia and nitrous oxide gas loss with subsurface drainage and polymer-coated urea fertilizer in a poorly drained soil

P. Nash, P. Motavalli, K. Nelson and R. Kremer
Journal of Soil and Water Conservation July 2015, 70 (4) 267-275; DOI: https://doi.org/10.2489/jswc.70.4.267
P. Nash
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P. Motavalli
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K. Nelson
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R. Kremer
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Abstract

Gaseous nitrogen (N) loss from denitrification and ammonia (NH3) volatilization from poorly drained soils in corn (Zea mays L.) production can be significant, diminish production, and lead farmers to apply a high rate of N. Nitrous oxide (N2O), a greenhouse gas that is emitted during denitrification, has a high global warming potential that contributes to climate change. Reducing gaseous N loss from poorly drained soils through drainage and N management in corn production is essential to minimizing the environmental impact and maintaining high yields. The objective of the study was to determine how subsurface tile drainage and applications of polymer-coated urea (PCU) affect soil N2O emissions and N fertilizer-induced NH3 volatilization loss from a claypan soil. Drainage water management treatments consisted of conventional subsurface tile drainage, managed subsurface tile drainage, and no-drainage in combination with N fertilizer source (noncoated urea [NCU] and PCU). Subsurface drainage treatments did not significantly (p ≤ 0.05) affect cumulative soil N2O emissions and NH3 volatilization loss compared to no-drainage. Averaged over 2010 to 2013, cumulative soil N2O emissions from PCU was 2% of applied N, and NCU was 4% of applied N. Yield-scaled soil N2O emissions were reduced 53% with PCU compared to NCU. The percentage fertilizer loss from NH3 volatilization was significantly (p ≤ 0.05) reduced from 2.8% with NCU to 0.8% with PCU. These results suggest that use of PCU may assist in reducing cumulative losses of N2O and NH3 from poorly drained claypan soils, but drainage systems operating under this study's environmental conditions did not affect gaseous N losses.

  • © 2015 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 70 (4)
Journal of Soil and Water Conservation
Vol. 70, Issue 4
July/August 2015
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Ammonia and nitrous oxide gas loss with subsurface drainage and polymer-coated urea fertilizer in a poorly drained soil
P. Nash, P. Motavalli, K. Nelson, R. Kremer
Journal of Soil and Water Conservation Jul 2015, 70 (4) 267-275; DOI: 10.2489/jswc.70.4.267

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Ammonia and nitrous oxide gas loss with subsurface drainage and polymer-coated urea fertilizer in a poorly drained soil
P. Nash, P. Motavalli, K. Nelson, R. Kremer
Journal of Soil and Water Conservation Jul 2015, 70 (4) 267-275; DOI: 10.2489/jswc.70.4.267
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