Abstract
Abstract Soil samples were taken from the test farm in Zegveld . In batch cultures the kinetics of methane oxidation by soil from different depths were investigated. Soil was incubated in 300 ml flasks with 1, 10, 100 and 10.000 ppmv methane, respectively. All 4 applied concentrations of methane were biologically degraded by this type of grassland soil. The highest oxidative activities, especially for lower concentrations (1–100 ppmv), were observed between 5 and 20 cm soil depth. Most importantly, these experiments demonstrated that this soil acts as a sink for methane even at concentrations well below 1 ppmv. In continuous cultures soil was incubated in columns receiving a continuous gasflow of 4 ml/min containing methane at 4 different concentrations. Thereby, all concentrations of methane were degraded continuously by this type of soil.
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