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Factors controlling N_2O and CH_4 fluxes in mixed broad-leaved/korean pine forest of Changbai Mountain, China

Journal of Forestry Research 1999年第4期10卷 214-218页

作者：徐慧陈冠雄黄国宏韩士杰张秀君 Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110015 P.R. China

Using the closed chamber technique, the in situ measurements of N2O and CH4 fluxes was conducted in a broad-leaved korean pine mixed forest ecosystem in Changbai Mountain, China. from June 1994 to october 1995. The relationships between fluxes (N2O and CH4) and some major environmental factors (temperature, soil water content and soil availabIe nitrogen) were studied. A significant positive correlation between Nzo emission and air/soil temperature was observed, but no significant correIation was found between N2O emission and soil water content (SWC). This result showed that temperature was an important controlling factor of N2O flux. There was a significant correlation between CH4 uptake and SWC, but no significant correlation was found between CH4 uptake and temperature. This suggested SWC was an important factor controlling CH4 uptake. The very significant negative correlation between logarithmic N2O flux and soil nitrate concentration, significant negative correlation between CH4 flux and soil ammonium content were also found.

关键词： broad-leaved/korean pine forest N2O CH4 Flux Environmental factors

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