Soil N2O and CH4 fluxes in broad-leaved Korean pine forest of Changbai Mountains

Abstract

Abstract: The soil N₂O and CH₄ fluxes in the broad-leaved Korean pine forest of Changbai Mountains under two treatments were measured by static chamber-gas chromatograph.The results showed that litter significantly influenced N₂O emission and CH₄ uptake,and the effect efficiency was 36.9% and 23.4%,respectively.The N₂O emission fluxes of the two treatments showed similar seasonal variations,with the highest in spring,higher in summer,and lower in autumn and winter.Furthermore,their diurnal variations were the same,the maxima both occurred at 18 o'clock,and the minima appeared at 12 o'clock and 14 o'clock.As for CH₄ uptake fluxes,their seasonal variations were similar.The CH₄ uptake fluxes were significantly higher in summer and autumn than in spring and autumn,and their diurnal variations were also the same,both went up from 14 o'clock to 18 o'clock and then started to go down until 6 o'clock.The results also indicated that soil N₂O emission fluxes were negatively linear-correlated to CH₄ uptake fluxes in the broad-leaved Korean pine forest.

Key words: N₂O and CH₄, Flux, Seasonal variation, Diurnal variation

CLC Number:

S181

XIAO Dongmei, WANG Miao, JI Lanzhu, HAN Shijie, WANG Yuesi. Soil N₂O and CH₄ fluxes in broad-leaved Korean pine forest of Changbai Mountains[J]. Chinese Journal of Applied Ecology, 2004, (10): 1855-1859.

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Soil N₂O and CH₄ fluxes in broad-leaved Korean pine forest of Changbai Mountains

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