• 责任者：Lin Lisha (Xinjiang Institute of Ecology and Geography ; Chinese Academy of Science ; Urumqi 830011 ; China) ; Li Xiangyi
• 刊名：Arid Land Geography
• 出版年：2009
• 卷期：31(1)
• 关键词：土壤 ; soils ; 二氧化碳 ; carbon dioxide ; 吉林 ; Jilin Province
• 页码：p.67-71
• 图表：3 illus., 1 table, 18 refs.
• 分类号：1800
• issnNo：1000-6060
• isbnNo：65-1103/X

Soils play a crucial role in the global carbon cycle. The exchange of CO₂ between soils and the atmosphere is an ecosystem-scale flux. Nonetheless, the understanding of the exchange is still very limited. Temperate forest accounts for about 24% of the total forestland in the world. Thus, the contributions of CO₂ from soil to atmosphere in this region can not be neglected in global carbon cycle. For this purpose, the investigations of CO₂ exchange between soil and atmosphere were performed in birch forest in the Changbai Mountains in the northeast of China in autumn of 2002, spring and summer of 2003. The soil CO₂ flux was measured by closed chamber and gas chromatography technique in the floor where the litters that cover the soil were removed or not removed. The result showed the soil carbon flux was higher in summer than that in spring and autumn. The litter layer influences the soil carbon release. In summer, the respiration flux of the litter layer-removed soil was higher than that of soil covered with litter layer, but the results were reverse in spring and autumn.