HR: 09:15h
AN: B31B-06 INVITED     [PDF]
TI: Trace Gas and Carbon Sequestration Dynamics in Temperate Croplands and Successional Ecosystems: A Full-Cost Accounting
AU: * Robertson, G P
EM: robertson@kbs.msu.edu
AF: W.K. Kellogg Biological Station and Dept. of Crop and Soil Sciences, Michigan State University, Hickory Corners, MI 49080
AU: McSwiney, C P
EM: Claire.McSwiney@kbs.msu.edu
AF: W.K. Kellogg Biological Station and Dept. of Crop and Soil Sciences, Michigan State University, Hickory Corners, MI 49080
AB: Agriculture is responsible for 21-25% of the global anthropic CO2 flux, 55-60% of the anthropic CH4 flux, and 65-80% of the anthopic flux of N2O. A number of CO2 stabilization strategies target agricultural production practices, and the potential for simultaneously abating fluxes of the non-CO2 greenhouse gases is substantial. But so is the potential for creating greenhouse gas (GHG) liabilities, the unintentional increase in one or more GHGs by activities that mitigate another. Whole-system accounting provides a means for including all GHG-contributing processes in the same cropping system analysis in order to illuminate major liabilities and synergies. We contrast a field crop system in the upper U.S. midwest with unmanaged successional ecosystems in the same landscape, and provide evidence that N2O flux - the major contributor to radiative forcing in row-crop systems - can be abated with little loss of crop productivity.
DE: 0315 Biosphere/atmosphere interactions
DE: 0400 Biogeosciences
DE: 1610 Atmosphere (0315, 0325)
DE: 1615 Biogeochemical processes (4805)
SC: Biogeosciences [B]
MN: 2003 Fall Meeting