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NALDC Record Details:
Soil Greenhouse Gas Emissions Affected by Irrigation, Tillage, Crop Rotation, and Nitrogen Fertilization.
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Management practices, such as irrigation, tillage, cropping system, and N fertilization, may influence soil greenhouse gas (GHG) emissions. We quantified the effects of irrigation, tillage, crop rotation, and N fertilization on soil CO(2), N(2)O, and CH(4) emissions from March to November, 2008 to 2011 in a Lihen sandy loam in western North Dakota. Treatments were two irrigation practices (irrigated and nonirrigated) and five cropping systems (conventional-tilled malt barley [Hordeum vulgaris L.] with N fertilizer [CT-N], conventional-tilled malt barley with no N fertilizer [CT-C], no-tilled malt barley–pea [Pisum sativum L.] with N fertilizer [NTPN], no-tilled malt barley with N fertilizer [NT-N], and no-tilled malt barley with no N fertilizer [NT-C]). Th e GHG fluxes varied with date of sampling and peaked immediately after precipitation, irrigation, and/or N fertilization events during increased soil temperature. Both CO(2) and N(2)O fluxes were greater in CT-N under the irrigated condition, but CH(4) uptake was greater in NT-PN under the nonirrigated condition than in other treatments. Although tillage and N fertilization increased CO(2) and N(2)O fluxes by 8 to 30%, N fertilization and monocropping reduced CH(4) uptake by 39 to 40%. The NT-PN, regardless of irrigation, might mitigate GHG emissions by reducing CO(2) and N(2)O emissions and increasing CH(4)uptake relative to other treatments. To account for global warming potential for such a practice, information on productions associated with CO(2) emissions along with N(2)O and CH(4) fluxes is needed.
Upendra M. Sainju
William B. Stevens
Mark A. Liebig
USDA Scientist Submission
Journal of Environmental Quality 2012 v.41 no.6
Journal Articles, USDA Authors, Peer-Reviewed
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
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