森林生态系统碳循环对全球氮沉降的响应  

Carbon cycling of forest ecosystems in response to global nitrogen deposition: a review

作　　者：樊后保[1] 黄玉梓[2] 袁颖红[1] 李燕燕[1] 黄荣珍[1] 樊海燕[3] 

机构地区：[1]南昌工程学院生态与环境科学研究所,南昌330029 [2]福建农林大学生命科学学院,福州350002 [3]厦门大学化学化工学院,厦门361005

出　　处：《生态学报》2007年第7期2997-3009,共13页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(30370259);福建省自然科学基金重点资助项目(B0320001)~~

摘　　要：森林土壤和植被储存着全球陆地生态系统大约46%的碳,在全球碳平衡中起着非常重要的作用。过去几十年来,森林生态系统的碳循环和碳吸存受到了全球氮沉降的深刻影响,因为氮沉降改变了陆地生态系统的生产力和生物量积累。以欧洲和北美温带森林区域开展的研究为基础,综述了氮沉降对植物光合作用、土壤呼吸、土壤DOM及林木生长的影响特征和机理,探讨了森林生态系统碳动态对氮沉降响应的不确定性因素。热带森林C、N循环与大部分温带森林不同,人为输入的氮对热带生态系统过程的影响也可能不同,因此指出了在热带地区开展碳氮循环耦合研究的必要性和紧迫性。Forest soils and vegetation store about 46 percent of all carbon in the terrestrial biosphere, which play a critical role in global carbon balance. Increases in atmospheric nitrogen deposition over the last several decades have altered carbon cycling and sequestration of forest ecosystems by affecting productivity and biomass accumulation in terrestrial ecosystems. Based on the studies conducted in temperate forest regions in Europe and North America, the paper reviewed mechanism and characteristics underlying the impacts of nitrogen deposition on plant photosynthesis, soil respiration, soil dissolved organic matter （ DOM）, and tree , and the uncertainties as dynamics and nitrogen deposition were also analyzed and discussed. to the interactions between forest ecosystem carbon Most tropical forests function quite differently from temperate forests with regard to N and C cycling, and that the effects of anthropogenic N inputs on tropical ecosystem processes may also differ, so it is urgent and necessary to initiate studies related to carbon-nitrogen cycle coupling in the tropical regions.

关 键 词：森林生态系统 碳循环 氮沉降 光合作用 森林土壤 林木生长 

分 类 号：S718.5[农业科学—林学]