Carbon flow analysis of China＇s agro-ecosystem from 1980 to 2013： A perspective from substance flow analysis  

作　　者：Yu Li Can Wang Minpeng Chen 

机构地区：[1]1. School of Environrnent, Tsinghua Uniuersity, Beijing 100084, China. [2]State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua Uniuersity, Beijing 100084, China [3]Institute of Enuironment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China

出　　处：《Journal of Environmental Sciences》2017年第5期20-32,共13页环境科学学报（英文版）

基　　金：supported by the National Science & Technology Pillar Program during the 12th Five-year Plan Period (No. 2013BAD11B03);the National Natural Science Foundation of China (Nos. 71573260,71273153,and 71525007);the Basic Scientific Research Fund (No. BSRF201311) for National Nonprofit Institutes from Ministry of Agriculture(MoA),China

摘　　要：Research on carbon cycling has attracted attention from both scientists and policy-makers. Based on material flow analysis, this study systematically budgets the carbon inputs, outputs and balance from 1980 to 2013 for China＇s agro-ecosystem and its sub-systems, including agricultural land use, livestock breeding and rural life. The results show that from 1980 to 2013, both the carbon input and output were growing gradually, with the carbon input doubling from 1.6 Pg C/year in 1980 to 3.4 Pg C/year in 2013, while carbon output grew from 2.2 Pg C/year in 1980 to 3.8 Pg C/year in 2013. From 1980 to 2013, the crop production system in China has remained a carbon source, and the agricultural land uses were also almost all carbon sources instead of carbon sinks. As soil carbon stock plays a very important role in deciding the function of China＇s agro-ecosystem as a carbon sink or source, practices that can promote carbon storage and sequestration will be an essential component of low carbon agriculture development in China.Research on carbon cycling has attracted attention from both scientists and policy-makers. Based on material flow analysis, this study systematically budgets the carbon inputs, outputs and balance from 1980 to 2013 for China＇s agro-ecosystem and its sub-systems, including agricultural land use, livestock breeding and rural life. The results show that from 1980 to 2013, both the carbon input and output were growing gradually, with the carbon input doubling from 1.6 Pg C/year in 1980 to 3.4 Pg C/year in 2013, while carbon output grew from 2.2 Pg C/year in 1980 to 3.8 Pg C/year in 2013. From 1980 to 2013, the crop production system in China has remained a carbon source, and the agricultural land uses were also almost all carbon sources instead of carbon sinks. As soil carbon stock plays a very important role in deciding the function of China＇s agro-ecosystem as a carbon sink or source, practices that can promote carbon storage and sequestration will be an essential component of low carbon agriculture development in China.

关 键 词：Substance flow analysis Greenhouse gas emissions Carbon source Agro-ecosystem China 

分 类 号：X171[环境科学与工程—环境科学] S181[农业科学—农业基础科学]