小兴安岭毛赤杨沼泽甲烷日排放研究

Analysis on the Emissions of CH4 from Alnus sibirica swamps in the Xiaoxing′an Mountains

利用静态暗箱-气相色谱法,实验样地为小兴安岭林区毛赤杨(Alnus swamp)沼泽,对2013年生长季未干扰毛赤杨沼泽甲烷春季、夏季、秋季各选择一天开展24小时排放通量日变化的研究,分析样地甲烷日变化排放规律,探讨甲烷日变化与环境因子相关性。结果表明,甲烷排放通量表现为单峰曲线,不同季节CH 4日排放变化规律较一致,峰值发生时间也较一致,日排放通量表现为秋季>春季>夏季。

In this paper,the static dark box-gas chromatography method is used to test the sample for the Alnus sibirica swamp marsh in the Xiaoxing'anling forest area.For the spring,summer and autumn,the CH 4 from Alnus sibirica swamps that was not disturbed in the growing season in 2013 was selected.A 24-hour study on the daily variation of emission flux was carried out,and the daily variation of methane emission in the sample was analyzed.The correlation between the daily variation of CH 4 and environmental factors was discussed.The results show that the CH 4 emission flux shows a single-peak curve.The variation of CH 4 emission in different seasons is consistent,and the peak occurrence time is also consistent.The daily emission flux is autumn>spring>summer.