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ID:36849671
大小:3.02 MB
页数:45页
时间:2019-05-16
《秸秆还田对典型盐碱地土壤温室气体及NO排放的影响研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、两南大学硕十学位论文摘要秸秆还田对典型盐碱地土壤温室气体及NO排放的影响研究环境科学专业硕士研究生:,梁旺国指导教师:李航教授郑循华研究员摘要采月j静态箱采样与气相色谱及化学发光分析相结合的方法,对晋南地区典型盐碱地农田的裸地土壤在夏、秋季(2008年6月~10月)的二氧化碳(C02)、氧化亚氮(N20)、甲烷(CH4)和一氧化氮(NO)净排放通颦进行了原位观测,进而研究了N20和CH4净排放与土壤碳平衡(即累计二氧化碳(C02)净排放量和秸秆还田碳量的代数和)的综合全球增温潜势(GWP),以及NO和N20排
2、放通量的摩尔比(即NO:N20)。与无收割小麦秸秆还田(NR)的情形相比,还田一半(HR)和全部的收割小麦秸秆还田(FR)可分别明显降低32%(p1情形发生的频率远小于50%,且其值与秸秆还田量呈显著的线性负相关(p3、IPCC的排放系数默认值(1.O%)很可能会严重高估盐碱地农田还田小麦秸秆引起的N20的排放。关键词:温室气体(GHG)一氧化氮(NO)矿化系数全球增温潜势(G、vP)秸秆盐碱地两南大学硕十学何论文AbstractStudyofimpactsofamendantplantresiduesonthemissionsofGreenHouseGasesandNOfromtypicalsalinesoilApplicantforMasterDegree:LIANGWangguoSupervisor:ProfLIHan4、gProf.ZHENGXunhuaAbstractEmissionsofcarbondioxide(C02),nitrousoxide(N20),nitricoxide(NO)andmethane(CH4)fromtypicalsalineagriculturalsoilinsouthShanxiweremeasuredfromJune19throughOctober6,2008.Airsampleswerecollectedwithstaticandopaquechambersandanalyzedwith5、agaschromatographandachemiluminescentNOxanalyzer.Theinvestigatedfieldswereappliedwith3treatmentsofwheatresidueapplication,whichwerezero(NR),moderate(HR)andhi【gh(FR)rates.Basedonthemeasureddata,weinvestigatedtheoverallglobalwarmingpotential(owP)attheseasonal6、scale,whichintegrates:a)thenetemissionsofN20andCH4and,b)thebalanceofsoilorganiccarbon.ThelateritemiscalculatedasthesumoftheaccumulativeC02emissionandtheincorporatedresiduecarbon.WealsoinvestigatedthemolarratioofNOtoN20fluxesfNO:N20).TheGWPsignificantlywasre7、ducedby32%atHR(p8、hincorporationratesofwheatresiduesQ
3、IPCC的排放系数默认值(1.O%)很可能会严重高估盐碱地农田还田小麦秸秆引起的N20的排放。关键词:温室气体(GHG)一氧化氮(NO)矿化系数全球增温潜势(G、vP)秸秆盐碱地两南大学硕十学何论文AbstractStudyofimpactsofamendantplantresiduesonthemissionsofGreenHouseGasesandNOfromtypicalsalinesoilApplicantforMasterDegree:LIANGWangguoSupervisor:ProfLIHan
4、gProf.ZHENGXunhuaAbstractEmissionsofcarbondioxide(C02),nitrousoxide(N20),nitricoxide(NO)andmethane(CH4)fromtypicalsalineagriculturalsoilinsouthShanxiweremeasuredfromJune19throughOctober6,2008.Airsampleswerecollectedwithstaticandopaquechambersandanalyzedwith
5、agaschromatographandachemiluminescentNOxanalyzer.Theinvestigatedfieldswereappliedwith3treatmentsofwheatresidueapplication,whichwerezero(NR),moderate(HR)andhi【gh(FR)rates.Basedonthemeasureddata,weinvestigatedtheoverallglobalwarmingpotential(owP)attheseasonal
6、scale,whichintegrates:a)thenetemissionsofN20andCH4and,b)thebalanceofsoilorganiccarbon.ThelateritemiscalculatedasthesumoftheaccumulativeC02emissionandtheincorporatedresiduecarbon.WealsoinvestigatedthemolarratioofNOtoN20fluxesfNO:N20).TheGWPsignificantlywasre
7、ducedby32%atHR(p8、hincorporationratesofwheatresiduesQ
8、hincorporationratesofwheatresiduesQ
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