Parr, S.J., A.T. Corbin, and G.P. Robertson
Presented at the All Scientist Poster Reception (2007-05-14 to 2007-05-14 )
Fluxes of the greenhouse gases nitrous oxide and methane plus soil carbon sequestration were measured along a ten-point management intensity gradient in southwest Michigan. Gas fluxes were measured in situ using the static chamber method. Soil carbon measulrements were made to 1-m. Preliminary results show that nitrous oxide fluxes were highest in the annual cropping systems and alfalfa perennial system, and lowest in the poplar successional systems. Methane oxidation was highest in the mature foprest, next highest in successional systems, and lowest in the annual crops and alfalfa systems.Carbon sequestration was highest in the successional systems and perennial alfalfa, and lowest in the conventionally- tilled agricultural system. Results can be used to inform landscape and regional scale predictions of changes in global warming potentials due to changing land use and agricultural management.
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