【摘要】 利用静态箱/气相色谱法,观测了生长季(5~9月)三江平原小叶章沼泽化草甸H2S和COS的释放动态,结果表明,H2S、COS的排放通量具有季节和日变化规律,小叶章沼泽化草甸H2S的平均释放通量为0.34μg.(m2.h)-1,COS的平均释放通量为-0.29μg.(m2.h)-1;在生长季,小叶章沼泽化草甸表现为H2S的源,COS的汇.小叶章的生长过程对H2S、COS的排放影响显著,在小叶章生长旺盛期,H2S出现排放峰值,COS出现吸收高峰,H2S和COS的释放通量呈负相关.更多还原

【Abstract】 Using the static chamber and chromatogram method,H₂S and COS emission fluxes from the mash meadow Calamagrostis angustifolia in Sanjiang Plain were measured during growth season（5～9month）,the results showed that the seasonal and diurnal variations of H₂S and COS emission fluxes were obvious,the mean H₂S and COS emission fluxes from the mash meadow Calamagrostis angustifolia were 0.34(μg·（m²·h）^-1)and-0.29(μg·（m²·h）^-1) respectively,the Calamagrostis angustifolia wetlands were the sources for H₂S and the sinks for COS during the growth time. The emission fluxes of H₂S and COS were affected by the Calamagrostis angustifolia growth,and there were H₂S emission peak and COS absorbed peak during the bloom growth time,meanwhile the integrative correlation of H₂S and COS emission fluxes were observed.更多还原