Abstract
In order to quantify the effects of temperature and soil water content on soil respiration, during June and July 2002 CO2 soil efflux was measured with a closed chamber (non-steady state, flow through) system in the field. The amount of CO2 emission was highly dependent on the land-use in the observation area, which consisted of meadow soil and brownfield. The CO2 emission from the brownfield ranged from 0.9 to 5.5 µmol CO2 m−2 s−1, and that for meadow soil from 1.1 to 12.6 µmol CO2 m−2 s−1. Soil respiration, as a function of soil temperature (Tsoil), relative soil water content (RSWC), soil pH, and the soil carbon/nitrogen ratio (C/N), was analysed by a modified closed non-linear regression model. Between 63% and 81% of the variation of soil CO2 emission could be explained with changes of Tsoil, RSWC, pH, and C/N for the individual chambers on the brownfield.
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