生态学报2017，Vol.37Issue(9)：2904-2912,9.DOI:10.5846/stxb201601180120
农地利用碳强度及可持续性动态变化——以山东省平度市为例
Dynamic changes in the carbon intensity and sustainability of farmland use: A case study in Pingdu County, Shandong Province, China
摘要
Abstract
During 1995-2013,the carbon emissions for farmland uses in Pingdu County (in Shandong Province,China) were calculated by selecting the main sources of emissions and establishing a measurement system for the sources,including indirect carbon emissions for agrochemical inputs,direct N2O emissions for N fertilization,carbon emissions for energy consumption and straw burning,and CH4 and N2O emissions for livestock farming.The changes in carbon intensity were calculated based on the changes in agricultural output value,and the changes in the carbon sustainability index were calculated based on the carbon emissions of the main sources and carbon absorption by the main crops.The results were as follows:(1) The order of annual mean carbon emissions was agrochemical materials (22.50 ten thousand tons) ＞ livestock farming (17.41 ten thousand tons) ＞ straw burning (6.62 ten thousand tons).The carbon emissions for straw burning showed an increasing trend,whereas the emissions from the other sources showed a decreasing trend.(2) The increasing rate for the agricultural output value exceeded that of total carbon emissions,with the carbon emissions per agricultural output value decreasing from 1.24 t/Yuan in 1995 to 0.35 t/Yuan in 2013 (annual average decrease of 0.0459 t/Yuan).(3) The carbon sustainability index had an annual average increasing rate of 7.12％.This trend indicated that the carbon absorption by crops was greater than the carbon emissions from the farmland processes.Overall,this study not only provides an understanding of carbon emissions and a scientific basis for sustainable development of farmland in small-or mediumscale regions in eastern China,but it also promotes the reduction of agricultural carbon emissions in China.In addition,this study could provide basic information for the investigation of Land-Use and Land-Cover Change and Carbon Cycle of International Human Dimensions Programme on Global Environmental Change.关键词
农地利用/碳排放/碳吸收/可持续性Key words
farmland use/carbon emissions/carbon absorption/sustainability引用本文复制引用
吴金凤,王秀红..农地利用碳强度及可持续性动态变化——以山东省平度市为例[J].生态学报,2017,37(9):2904-2912,9.基金项目
国家自然科学基金项目“东西部土地集约利用变化及其生态风险的对比研究”[41371531(2014-2017)] （2014-2017）
