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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(11/,210008;21,100049):CH4,CH4:CH4(P0105),2(P0105);CH4(P0105),NH4+2NCH4;CH4(P0105),2(P0105)CH4CH4CH4CH4CH4:CH4;CH4;CH4;:X511:A:1673-4831(2010)02-0097-06EffectsofLandManagementinWinteronProduction,OxidationandEmissionofCH4DuringtheRice2GrowingSeason.ZHANGGuang2bin1,2,ZHANGXiao2yan1,2,MAEr2deng1,2,MAJing1,XUHua1,CAIZu2cong1(1.StateKeyLabo2ratoryofSoilandSustainableAgriculture/InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008,China;2.GraduateUniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:Tostudyeffectsoflandmanagementinwinteronproduction,oxidation,andemissionofCH4fromthepaddyfieldduringthefollowingrice2growingseason,indoorincubationandfieldexperimentswerecarriedouttomeasureCH4productionpotential,CH4oxidationpotential,andCH4fluxinTreatmentsDF(drainedfallow),DW(drainedwithwheatplanting),andFF(floodedfallow).ResultsshowthatnosignificantdifferenceinCH4productionpotentialwasobservedbetweenTreatmentsDFandDW(P0105),butbothweresignificantlylowerthaninTreatmentFF(P0105).Nosig2nificantdifferenceinCH4oxidationpotentialswasobservedamongthethreetreatments(P0105).ComparedwiththeeffectsoflandmanagementinwinteronCH4oxidationpotential,theeffectofsoilNH4+2Ncontentduringtherice2growingseasonwasmoreimportant.ThemeanCH4fluxwasmuchhigherinTreatmentDFthaninTreatmentDW(P0105),butbothweresignificantlylowerthaninTreatmentFF(P0105).ThesignificantlyhigherCH4productionpotentialinTreat2mentFFthaninTreatmentDFwasthereasonwhytheCH4fluxinTreatmentFFwasmuchhigher.TheeffectsoflandmanagementinwinteronCH4emissionduringtherice2growingseasonweremainlyaffectedbyCH4productionpotentialratherthanCH4oxidationpotential.Keywords:CH4productionpotential;CH4oxidationpotential;CH4flux;landmanagement,[1]CH4CO2,,CH4CO271672[2]CH4300a,118LL-1,,20a[3-6]CH4,CH4,CH4[7-8],CH4[9-10]IPCC4CH431112Tga-1[11],:(KZCX2-YW-Q1-07);(2007BAD89B18);:2009-08-10E2mail:hxu@issas.ac.cn2010,26(2):97-102JournalofEcologyandRuralEnvironment©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()[12-13]CH4,CH4[14]()CH4[15-16]CH4,CH4,CH43914%4413%,CH4[12],CH4?,,CH4?,CH4,CH4,CH41111(3158N,11918E),1511,101816mm,(015cm)1112gkg-1,110gkg-1,pH6191123:(1):,5,20071119,2008531;(2):;(3):3,(20086212008112):(N)300kghm-2,m()m()m()211,450kghm-2225kghm-2,62278822;3,516,622,112;,621108113CH447d1,8:0012:0015cm,18mL,15min1,4,,(ToaPRN-41,HiroseRikaCo.Ltd.,Japan)10cm(Eh)CH4(GC-12A)2molL-1KCl(NH4+2NNO3-2NNO2-2N),V()m()51,(Skalar,Holland)CH4,,2250mL,3:2008711(19DAT,19)727(35DAT)812(51DAT)827(66DAT)910(80DAT)924(94DAT)108(108DAT)114CH450g(),250mL,m()V()11,N2,,,,,,N26N2(N210113kPa),CH41h()50h()CH4,CH4,CH4,[17]84115CH450g(),2508926©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()V()11,,,215mLCH4,CH410000LL-1,30min()CH4,(120rmin-1)18h23hCH4,22hCH412CH4,2CH4,2CH4CH4[18-19],,,,36h116CH4CH4:P=dc/dtVh/msMm/Vs273/T(1)(1),PCH4,gg-1d-1;dc/dtCH4,LL-1d-1;Vh,L;ms,g;Mm1molCH4,g;Vs1mol,L;T,K117CH4CH4,:F=dc/dt01714h273/T(2)(2),FCH4,mgm-2h-1;h,m;dc/dtCH4,mgL-1h-1;T,K118CH4CH4CH4CH4CH43,CH43CH450hCH4,3,CH43MicrosoftExcel2003softwareforwindowsSPSS1010softwareforwin2dows(SPSSInc.,Chicago)r2019,2211CH4CH4(1)CH435,3199gg-1d-1,,CH4(1)CH4,80,21262173gg-1d-1,(1),CH4(P0105),(P0105)CH4,CH4,CH4,,,;,CH4,CH4[20]CH4,CH4XU[14],,Eh,CH4,,Eh(-165mV)(-88mV)(-79mV)(2),CH4(1),Eh,CH4(1)1CH4Fig.1SeasonalvariationofCH4productionpotentialsduringtherice2growingperiod992:CH4©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3),CH4,,NH4+2N,,CH4,NH4+2N,,CH4[21-23]3CH4Fig.3SeasonalvariationofCH4oxidationpotentialsduringtherice2growingperiodCH4(3),CH4(P0105),CH4CH4,CH4,O2CH4,CH4[14]CH4,CH4,,,CH4[24][14],,,CH4,CH4,,CH4,,CH4(3),CH4,CH4,CH4(1),CH4(3)NH4+2NCH4BODELIER[25-26]CH4,CH4,NH4+2N(4),CH4(3),NH4+2NCH44NH4+2NFig.4SeasonalvariationofsoilNH4+2Ncontentsduringtherice2growingperiod213CH4CH414,80124mgm-2h-1,,(5),,CH4CH4,CH4(1)141,26174mgm-2h-1,00126©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(5)CH4(1),,CH4CH4,CH4,35,7162mgm-2h-1,(5)CH4,(1),CH4,5CH4Fig.5SeasonalvariationofCH4fluxesduringtherice2growingperiod1CH4Table1MeanCH4fluxandgrainyieldduringtherice2growingseasonCH4/(mgm-2h-1)/(thm-2)201282175a91041105a91682197b81640175a31230197c81630114a(P0105),(2),CH4,,,CH4(5),CH4,135CH4130d51%38%CH4(5),2863CH4130d52%,Eh(2),CH4Eh(2),,[17]128,CH4CH4(3),CH4(1),CH4(5),,CH4CH4CH4CH4CH4,CH4CH4CH4,CH4CH4CH43CH4CH4(P0105),(P0105);CH4(P0105),NH4+2NCH4;CH4(P0105),2(P0105)CH4CH4CH4CH4CH4:[1]IPCC.ClimateChange2007:UnderstandingandAttributingCli2mateChange[R/OL].[2009-03-12].[2]IPCC.ClimateChange2007:ChangesinAtmosphericConstituentsandinRadiativeForcing[R/OL].[2009-03-12].http:/