Perspectives on studies on soil carbon stocks and the carbon sequestration potential of China

查看全文 作　　者：ZHENG [1,2]JuFeng;CHENG [1]Kun;PAN [1]GenXing;Pete [3]SMITH;LI [1]LianQing;ZHANG [1]XuHui;ZHENG [1]JinWei;HAN [1]XiaoJun;DU [1]YanLing

机构地区：[1]Institute for Resource, Ecosystem and Environment of Agriculture, and Research Center of Agriculture and Climate Change, Nanjing Agricultural University, Nanjing 210095, China;[2]College of Resource and Environment, Nanjing Forestry University, Nanjing 210037, China;[3]Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, 23 St Machar Drive, Aberdeen, AB24 3UU. UK

出　　处：《Chinese Science Bulletin》索引2011年第56卷第35期,共11页

基　　金：supported by the National Natural Science Foundation of China (40830528 and 40270010092);supported by travel funds from a UK BBSRC China Partnership Award. PS is a Royal Society-Wolfson Research Merit Award holder 摘　　要：Soil carbon stocks and sequestration have been given a lot of attention recently in the study of terrestrial ecosystems and global climate change.This review focuses on the progress made on the estimation of the soil carbon stocks of China,and the characterization of carbon dynamics of croplands with regard to climate change,and addresses issues on the mineralization of soil organic carbon in relation to greenhouse gas emissions.By integrating existing research data,China's total soil organic carbon(SOC) stock is estimated to be 90 Pg and its inorganic carbon(SIC) stock as 60 Pg,with SOC sequestration rates in the range of 20-25 Tg/a for the last two decades.An estimation of the biophysical potential of SOC sequestration has been generally agreed as being 2 Pg over the long term,of which only 1/3 could be attainable using contemporary agricultural technologies in all of China's croplands.Thus,it is critical to enhance SOC sequestration and mitigate climate change to improve agricultural and land use management in China.There have been many instances where SOC accumulation may not induce an increased amount of decomposition under a warming scenario but instead favor improved cropland productivity and ecosystem functioning.Furthermore,unchanged or even decreased net global warming potential(GWP) from croplands with enhanced SOC has been reported by a number of case studies using life cycle analysis.Future studies on soil carbon stocks and the sequestration potential of China are expected to focus on:(1) Carbon stocks and the sequestration capacity of the earths' surface systems at scales ranging from the plot to the watershed and(2) multiple interface processes and the synergies between carbon sequestration and ecosystem productivity and ecosystem functioning at scales from the molecular level to agro-ecosystems.Soil carbon science in China faces new challenges and opportunities to undertake integrated research applicable to many areas. 关键词：土壤碳储量固碳潜力中国全球气候变化陆地生态系统生态系统生产力温室气体排放土地使用管理

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Perspectives on studies on soil carbon stocks and the carbon sequestration potential of China

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