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选择处于全球变化中国东北样带东部典型生态系统的长白山阔叶红松林作为研究区,采用动态气室-CO2红外分析法测定了森林生态系统不同退化阶段的土壤呼吸作用.结果表明:在生长季,长白山阔叶红松林不同退化阶段的土壤呼吸动态变化呈单峰型曲线,在7—8月达到最大值;不同退化阶段林地土壤呼吸大小顺序为:杨桦林>蒙古栎林>阔叶红松林>硬阔叶林>裸地.其中,杨桦林和蒙古栎林样地的碳释放量分别为对照阔叶红松林的1.4和1.3倍,硬阔叶林和裸地的碳释放量分别为对照阔叶红松林的88%和78%.
Choosing the broad-leaved Korean pine forest in Changbai Mountains, a typical ecosystem in the eastern part of the northeastern China transect, as the research area, the soil respiration of different degraded stages of forest ecosystem was determined by dynamic chamber-CO2 infrared analysis.The results showed that during the growing season The dynamic changes of soil respiration at different degradation stages in the broad-leaved Pinus koraiensis forest in Changbai Mountain presented a unimodal curve and reached the maximum value in July-August. The order of soil respiration in different degraded stages was: Populus birch forest> Quercus mongolica forest> Broad-leaved Korean pine forest> Hardwood broadleaved forest> bare land, among which the carbon emission of Populus simonii and Quercus mongolica plots were 1.4 and 1.3 times as much as that of the control and the broad-leaved Korean pine forest were respectively controlled 88% and 78% of Korean pine forest.