氮沉降对森林生态系统土壤碳库的影响  

Impact of nitrogen deposition on forest soil carbon pool

作　　者：邓小文[1] 韩士杰[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《生态学杂志》2007年第10期1622-1627,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金重点项目(90411020);国家重点基础研究发展规划资助项目(2002CB412502)

摘　　要：森林土壤碳库是陆地生态系统碳库的重要组成部分,对维持全球碳平衡具有重要意义。不断加剧的全球氮沉降有可能改变森林生态系统中碳元素的地球化学循环过程,从而引起森林土壤碳储量的变化。本文从森林土壤碳收支的角度,将氮沉降对森林生态系统土壤碳库影响的复杂过程划分为凋落物分解、细根周转、土壤呼吸和土壤可溶性有机碳淋失4个相对独立的过程。综合国内外研究现状,对其进行了简要评述,指出了目前研究的不足,并探讨了这一研究领域的发展方向。Forest soil carbon pool is an important component of terrestrial carbon pool, and plays a crucial role in global carbon balance. Elevated atmospheric nitrogen deposition due to human activities may affect the carbon cycle of forest ecosystem, and as a result, induce the change of forest soil carbon storage. From the viewpoint of forest soil carbon budget, this paper partitioned the impact of nitrogen deposition on soil carbon pool into four independent processes, i. e. , litter decomposition, fine root turnover, soil respiration, and dissolved organic carbon leaching. Based on the available literatures at home and abroad, the research progress on the four processes was reviewed, and the development trends of this field were discussed.

关 键 词：氮沉降 森林土壤碳库 碳收支 分解速度 碳循环 

分 类 号：S714[农业科学—林学]