A preliminary study on N2O and CH4 emissions from differentsoils on northern slope of Changbai Mountain

Abstract

Abstract: The fluxes of N₂O and CH₄ from tundra soil, soddy forest soil, brown coniferous forest soil and dark brown forest soil on northern slope of Changbai Mountain are measured in situ by chamber technique from June and August, 1994.The results show that all of the soils studied are the source of N₂O, and the sink of CH₄.The N₂O flux is in the range of 6.17 and 12.33 μg·m^-2·h^-1, while the CH₄ flux is between -85.63 and -7.58μg·m^-2·h^-1.There is a trade-off between N₂O emission and CH₄ uptake.Laboratory experiments show that upper soil layer (0-6cm) has the highest denitrification activity, which has a significant difference among different soils.The uptake of CH₄ by dark brown forest soil mainly occurs in upper soil layer (0-12cm).

Key words: Changbai Mountain, N₂O, CH₄, Emission, Pyruvate Kinase, G6PDH, walnut, fat, ACCase

Xu Hui, Chen Guanxiong, Ma Chengxin . A preliminary study on N₂O and CH₄ emissions from differentsoils on northern slope of Changbai Mountain[J]. Chinese Journal of Applied Ecology, 1995, 6(4): 373-377.

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A preliminary study on N₂O and CH₄ emissions from differentsoils on northern slope of Changbai Mountain

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