寒温带大兴安岭渐伐林森林土壤CH_4通量的研究  

CH_4 FLUX OF SUCCESSIVE CUTTING FOREST SOIL OF GREAT HINGAN MOUNTAINS IN COLD TEMPERATE ZONE

作　　者：杨小丹[1] 马秀枝[2] 周梅[1] 海龙[3] 呼和牧仁[1] 赵鹏武[1] 张慧东[4] 王树森[1] 宋彩玲[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010019 [2]内蒙古农业大学林学院,呼和浩特010019 [3]内蒙古林业科学研究院,呼和浩特010019 [4]辽宁省林业科学研究院,沈阳110032

出　　处：《内蒙古农业大学学报（自然科学版）》2010年第3期52-59,共8页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：国家自然基金重大项目(30590381-03);国家自然基金项目(40763002);国家林业局林业公益性资助项目(200704005/wb01)

摘　　要：利用静态箱-气相色谱法对寒温带大兴安岭兴安落叶松渐伐林生长盛季的地表CH4通量进行原位观测和研究。结果表明:在生长盛季该地区森林土壤总体表现为大气CH4的吸收汇,CH4日平均通量为(Mean±SE)-0.05±0.01 mg.m-2.h-1,且峰值出现在0:00和16:00左右。在生长盛季整体上原状林地土壤和无凋落物覆盖不同处理对土壤CH4通量的影响无显著差异,但在变化幅度和时间分布上有一定差异,无凋落物处理下土壤的CH4吸收通量变化幅度大于原状林地土壤。观测期间土壤CH4通量与温度具有一定的正相关关系,但线性相关系数较小,而与湿度相关性不显著,表明该地区在生长盛季土壤温度在控制土壤CH4通量中表现出重要性。Flux of soil CH4 was measured by closed static chamber-gas chromatograph technique in larix gmelinii successive cutting forest of Great Hingan mountains in cold temperate zone.The results showed that the soil of this region was a sink of CH4 to the atmosphere as a whole during the growing season,the daily mean soil CH4 flux（mean±SE） was-0.05±0.01 mg·m-2·h-1 during the observation period and the peak values appeared at about 0：00 and 16：00 respectively.Removal of surface litter had no significant effect on CH4 flux during the observation period,but there are some differences in the scale and time distribution.The plot with Iitters has larger scale than the Iitter-free plot.CH4 flux was obviously correlated with soil temperature,but the liner correlation coefficient is relatively small.However,CH4 flux was not correlated with soil moisture,which indicated that soil temperature was a main factor to control the CH4 flux during the growing season in this region.

关 键 词：CH4通量 凋落物 兴安落叶松林 寒温带 

分 类 号：S714[农业科学—林学]