Greenhouse Gases in Intensive Agriculture: Contributions of Individual Gases to the Radiative Forcing of the Atmosphere
Top Cited Papers
- 15 September 2000
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 289 (5486) , 1922-1925
- https://doi.org/10.1126/science.289.5486.1922
Abstract
Agriculture plays a major role in the global fluxes of the greenhouse gases carbon dioxide, nitrous oxide, and methane. From 1991 to 1999, we measured gas fluxes and other sources of global warming potential (GWP) in cropped and nearby unmanaged ecosystems. Net GWP (grams of carbon dioxide equivalents per square meter per year) ranged from 110 in our conventional tillage systems to −211 in early successional communities. None of the annual cropping systems provided net mitigation, although soil carbon accumulation in no-till systems came closest to mitigating all other sources of GWP. In all but one ecosystem, nitrous oxide production was the single greatest source of GWP. In the late successional system, GWP was neutral because of significant methane oxidation. These results suggest additional opportunities for lessening the GWP of agronomic systems.Keywords
This publication has 8 references indexed in Scilit:
- Standard Soil Methods for Long-Term Ecological ResearchPublished by Oxford University Press (OUP) ,1999
- The U.S. Carbon Budget: Contributions from Land-Use ChangeScience, 1999
- Carbon Sequestration in SoilsScience, 1999
- Legume-based cropping systems have reduced carbon and nitrogen lossesNature, 1998
- Integration of Environmental, Agronomic, and Economic Aspects of Fertilizer ManagementScience, 1998
- Closing the global N2O budget: nitrous oxide emissions through the agricultural nitrogen cycleNutrient Cycling in Agroecosystems, 1998
- Exchange of Trace Gases between the Terrestrial Biosphere and the Atmosphere in the MidlatitudesPublished by Springer Nature ,1994
- Methane and nitrous oxide fluxes in native, fertilized and cultivated grasslandsNature, 1991