Major factors controlling nitrous oxide emission and methane uptake from forest soil

Abstract

Soil samples were taken from depth of 0-12cm in virgin broad-leaved Korean pine mixed forest, in Changbai Mountain in July 2000. The effects of temperature, soil water content, pH, NH₄ ⁺ and NO₃ ⁺ on N₂O emission and CH₄ uptake of a forest soil were studied in laboratory by the method of orthogonal design. It was observed under laboratory conditions in this study that there were significant correlations between N₂O emission rate, CH₄ oxidation rate, soil pH and temperature. Nevertheless, N₂O emission rate also showed a significant positive correlation with CH₄ oxidation rate. The results suggested that pH and temperature were important factors controlling N₂O emission and CH₄ oxidation under this experiment conditions.

Keywords

N₂O emission / CH₄ uptake / Orthogonal design / Forest soil / S714.5 / A