Abstract：The seasonal N2O emissions and the key controlling factors during the growing season were monitored in the Carex lasiocarpa peatland of the Sanjiang Plain. Through the closed chamber-GC method, clearly seasonal variation of N2O fluxes was found, with the maximum value in early July. The mean flux of N2O in the growing season was 76.77μg/(m2·h), being higher than that of the gley swamp [20~60μg/(m2·h), 2002~2005]. The N2O fluxes showed exponential relationship correlated with the soil temperature (P<0.01) and the correlation gradually weaken when the soil depth was below 10cm. Meanwhile, vegetation was another factor that affects N2O emissions. The N2O flux emitted from soil with vegetation was 1.7 times higher than that without vegetation. The water table and soil temperature were the main factors that controlled the seasonal N2O emissions from peatland. Higher N2O flux in peatland than the gley swamp was caused by the difference of the hydrological and physical properties. Additionally, in the growing season, the total N2O emission in the herb peatland was about 72.9Mg/a, indicating that the peatland in the Sanjiang Plain was a large N2O potential source.
朱晓艳, 宋长春, 郭跃东, 石福习, 王丽丽. 三江平原泥炭沼泽湿地N2O排放通量及影响因子[J]. 中国环境科学, 2013, 33(12): 2228-2234.
ZHU Xiao-Yan, SONG Chang-Chun, GUO Yue-Dong, SHI Fu-Xi, WANG Li-Li. N2O emissions and its controlling factors from the peatlands in the Sanjiang Plain. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(12): 2228-2234.
