Variation of H2S and COS emission fluxes from Calamagrostis angustifolia Wetlands in Sanjiang Plain, Northeast China

Using the static chamber and Chromatograph method, H2S and COS emission fluxes from the mash meadow Calamagrostis angustifolia and typical meadow C. angustifolia in Sanjiang Plain Northeast China were measured during growth season (5–9 month), the results showed that the seasonal and diurnal variations of H2S and COS emission fluxes were obvious, the mean emission fluxes of H2S and COS from the mash meadow C. angustifolia were 0.34 and −0.29 μg S m−2 h−1, respectively, and from typical meadow C. angustifolia were 0.14 and −0.20 μg S m−2 h−1, respectively, the mean emission fluxes of H2S and COS from the mash meadow C. angustifolia were both higher than their from typical meadow C. angustifolia. The C. angustifolia wetlands both can emit H2S to the atmosphere and absorb COS from the atmosphere in the growth season. The H2S and COS emission fluxes were affected by the C. angustifolia growth, and the H2S emission peak and COS absorbed peak were observed during the bloom growth time. There were negative correlations of H2S and COS emission fluxes in C. angustifolia Wetlands.