Actions for Aqueous and gaseous nitrogen losses induced by fertilizer application [electronic resource].

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Aqueous and gaseous nitrogen losses induced by fertilizer application [electronic resource].

Published
Berkeley, Calif. : Lawrence Berkeley National Laboratory, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Lawrence Berkeley National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
In recent years concern has grown over the contribution of nitrogen (N) fertilizer use to nitrate (NO₃⁻) water pollution and nitrous oxide (N₂O), nitric oxide (NO), and ammonia (NH₃) atmospheric pollution. Characterizing soil N effluxes is essential in developing a strategy to mitigate N leaching and emissions to the atmosphere. In this paper, a previously described and tested mechanistic N cycle model (TOUGHREACT-N) was successfully tested against additional observations of soil pH and N₂O emissions after fertilization and irrigation, and before plant emergence. We used TOUGHREACT-N to explain the significantly different N gas emissions and nitrate leaching rates resulting from the different N fertilizer types, application methods, and soil properties. The N₂O emissions from NH₄⁺-N fertilizer were higher than from urea and NO₃⁻-N fertilizers in coarse-textured soils. This difference increased with decreases in fertilization application rate and increases in soil buffering capacity. In contrast to methods used to estimate global terrestrial gas emissions, we found strongly non-linear N₂O emissions as a function of fertilizer application rate and soil calcite content. Speciation of predicted gas N flux into N₂O and N₂ depended on pH, fertilizer form, and soil properties. Our results highlighted the need to derive emission and leaching factors that account for fertilizer type, application method, and soil properties.
Report Numbers
E 1.99:lbnl-1689e
lbnl-1689e
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Note
Published through SciTech Connect.
01/15/2009.
"lbnl-1689e"
Journal of Geophysical Research--Biogeosciences 114 ISSN 0148-0227 FT
Miller, N.L.; Riley, W.J.; Oldenburg, C.M.; Spycher, N.; Steefel, C.; Gu, C.; Xu, T.; Hornberger, G.M.; Maggi, F.; Venterea, R.T.
Earth Sciences Division
Funding Information
DE-AC02-05CH11231
View MARC record | catkey: 14130458