利用静态箱-气相色谱法，研究了择伐和皆伐对小兴安岭落叶松-泥炭藓沼泽CH4、CO2、N2O排放的影响.结果表明：采伐改变了落叶松-泥炭藓沼泽CH4和N2O的季节排放规律，其中对照样地的CH4为夏季吸收、秋季排放，N2O夏秋季吸收；择伐样地的CH4和N2O在夏季集中排放；皆伐样地的CH4在夏秋季排放，N2O则在夏季吸收、秋季排放.但采伐对CO2季节排放规律的影响，均为夏季＞春季＞秋季.采伐改变了CH4、CO2和N2O的源汇功能，对照样地为CO2的排放源、CH4和N2O的弱吸收汇；采伐地的CO2排放量下降了1/4，并转化为N2O弱排放源，为CH4的弱排放源或强排放源.择伐样地温室效应贡献潜力较对照样地下降了24.5%，皆伐地则提高了3.2%.
By using static chamber and gas chromatography methods, this paper studied the effects of clear cutting and selective cutting on the CO2, CH4, and N2O emissions from Larix gmelini-Sphagnum swamp in Lesser Xing’an Mountains. Dramatic changes in the seasonal dynamics of CH4 and N2O emissions were detected in different treatment sites. Control site absorbed CH4 in summer and emitted CH4 in autumn, and absorbed N2O in both summer and autumn; selective cutting site emitted CH4 and N2O mainly in summer; and clear cutting site emitted CH4 in summer and autumn, and absorbed N2O in summer but emitted it in autumn. Cutting pattern had less effects on the seasonal dynamics of CO2 emission. Both on the clear cutting site and on the selective cutting site, the CO2 emission was in order of summer>spring>autumn. Forest cutting altered the source and sink functions of the sites. Control site functioned as a source of CO2 and a weak sink of CH4 or N2O, while forest cutting sites had a decrease of CO2 emission by 25%, and became a weak source of N2O and a weak or strong source of CH4. Compared with that of control site, the Global Warming Potential (GWP) of selective cutting site and clear cutting site was reduced by 24.5% and increased by 3.2%, respectively.