JP1.4 Environmental Controls on the CO2 Exchange in a Peanut Field

Tuesday, 29 April 2008
Floral Ballroom Magnolia (Wyndham Orlando Resort)
Natchaya Pingintha, Laboratory for Environmental Physics, The University of Georgia, Griffin, GA; and M. Y. Leclerc, J. Hong, G. Zhang, N. L. Dias, and C. Sengthong

Carbon dioxide exchanges were measured with the eddy-covariance method above a non-irrigated peanut field in Plains, Georgia. The experiment was conducted during the 2006 growing season (19 May-9 October) in order to understand the ecosystem-level carbon budget response to environmental parameters. In this work, we compare two approaches used to measure soil CO2 efflux at the same site. The values of soil CO2 efflux measured by the CO2 gradient approach were higher than the results of the automated chamber approach. However, the results obtained from the two approaches showed similar patterns of diurnal changes and had a fairly linear relationship.
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