Methane fluxes from differentially managed grassland study plots: the important role of CH_4 oxidation in grassland with a high potential for CH_4 production

摘要

Methane oxidation fluxes were monitored with the closed chamber method in eigth treatment plots on a semi-wet grassland site near Giessen, Germany. The management regimes differed in the amount of nitrogen(NH_4NO_3)fertilizer applies and in the height of the in-ground water table. No inhibition of CH_4 oxidation occurred, regardless of the amount of annual N fertilizer applied. Instead, the mean CH_4 consumption rates were correlated with the mean soil moisture of the plots. However, the correlation Between daily soil water content and corresponding CH_4 oxidation rate was always weak.