Soil N2O and CH4 fluxes in broad-leaved Korean pine forest of Changbai Mountains
长白山阔叶红松林土壤氮化亚氮和甲烷的通量研究

The soil N 2O and CH 4 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 N 2O emission and CH 4 uptake,and the effect efficiency was 36.9% and 23.4%,respectively.The N 2O 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 CH 4 uptake fluxes,their seasonal variations were similar.The CH 4 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 N 2O emission fluxes were negatively linear-correlated to CH 4 uptake fluxes in the broad-leaved Korean pine forest.