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时间:2017-12-08
《国农田土壤生态系统固碳现状和潜力》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据第28卷第2期生态学报v01.28,No.22008年2月ACTAECOLOGICASINlCAFeb.。2008中国农田土壤生态系统固碳现状和潜力韩冰,王效科+,逯非,段晓男,欧阳志云(中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085)摘要:研究在搜集和整理全国典型农业长期定位实验站数据的基础上,通过自建经验公式估算了不同管理措施下我国农田土壤的固碳能力和潜力。通过施用化肥、秸秆还田、施用有机肥和免耕措施。目前对我国农田土壤碳增加的贡献分别为40.51、23.89、35.83Tg·a“和
2、1.17TS·a~,合计为101.4TS·a~,是我国目前能源活动碳总排放量的13.3%。通过情景分析发现,提高化肥施用量、秸秆还田量、有机肥施用量和推广免耕,可以使我国农田土壤的固碳量分别提高到94.91、42.23、41.38TS·a卅和3.58Tg·a~,合计为182.1Tg·a~。农田土壤总的固碳潜力相当于目前我国能源活动碳排放量的23.9%,对于全球CO:减排具有重要的作用。关键词:农田生态系统;秸秆还田;使用有机肥;免耕;固碳潜力文章编号:1000—0933(2008)02.0612·08中图分类号:Q142
3、。s154.1。X171.1文献标识码:ASoilcarbonsequestrationanditspotentialbycroplandecosystemsinChinaHANBing,WANGXiao-Ke’,LUFei,DUANXiao—Nan,OUYANGZhi—YunStateLabofUrbanandRegionalEcd097,ResearchCenter加Eco—Environmentalsc洳,ChineseAcademyofSdenees,Beijing100085,Ch/naActsEcolo#ca
4、Sinica,2008,勰(2):0612—0619.Abstract:Risingatmosphericcarbondioxideconcentrationisaconcernbecauseofitspotentialforalteringclimate.SincethebeginningoftheIndustrialRevolutioninthe18thcentury,atmosphericC02hasincreasedbymorethan30%.Theiilcreaseinfossilfuelburninganda
5、ssociatedC02emissionsisexpectedtocontinuefortheforeseeablefuture。andadoubleoreventriplingofthepreindustrialconcentrationofatmosphericC02ispossiblebytheendofthe21stcentury.Someauthorshavethoughtagriculturalsoilscouldsequesteraconsiderablecarbontoslowtheriseoftheat
6、mosphericC02.Infact,thissequesteringpotentialdependsoninitialsoilcontent,climateandcultivation.Thelong—termexperimentsinNorthAmericahaveprovedthatarablelandshavebeenchangingfromaCsourcetosinkbyconservationmanagement,such鹊reduced—andno—tiUpractice,manureUse,rotati
7、on,andintroducingcovercrops.Fromthepointofviewofagriculturalmanagement,tokeepthesustainabledevelopmentandrealizethecarbonsequestrationpotentialiscrucialtobothcropproductionandcarbonmitigation.ThecontributionofChina’BagriculturalpracticetoatmosphericC02hasbeenpaid
8、agreatattentionbecauseChinahasalonghistoryofagriculturetosupportone—fifthofglobalpopulation.Inthisstudy,basedondomestictypicallong—termfieldexperimentdata,expe
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