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当前位置:首页 > 商业/管理/HR > 企业文化 > DCD不同施用时间对水稻生长期CH4和N2O排放的影响李香兰
28820088ACTAECOLOGICASINICAVol.28,No.8Aug.,2008(40621001,40671094):2007-05-11;:2007-12-12:(1980~),,,.E-mail:xlli@issas.ac.cn*Correspondingauthor.E-mail:hxu@issas.ac.cnFoundationitem:TheprojectwasfinanciallysupportedbyNationalNaturalScienceFoundationofChina(No.40621001,40671094)Receiveddate:2007-05-11;Accepteddate:2007-12-12Biography:LIXiang-Lan,Ph.D.candidate,mainlyengagedingreenhousegasesemissionofagro-ecosystemandglobalchange.E-mail:xlli@issas.ac.cnDCDCH4N2O李香兰1,4,马 静1,4,徐 华1,*,曹金留2,蔡祖聪1,K.Yagi3(1.,, 210008;2., 212400;3., 305;4., 100049):。,(dicyandiamide,DCD)(、、)CH4N2O。,DCDCH4N2O。,DCD21.41%CH48.00%N2O;DCD30.30%N2O,5.24%CH4。DCD,DCD32.65%N2O11.18%CH4;DCDCH4N2O。CK、DCD、DCDDCDCH40.95、0.75、0.87mg/(m2·h)0.94mg/(m2·h),N2O155.67、143.24、108.50μg/(m2·h)153.24μg/(m2·h),DCDCH4N2O(p0.01)。N2O,CH4Eh(p0.01)。:;(DCD);CH4N2O;:1000-0933(2008)08-3675-07 :X823 :AEffectofdifferentapplicationtimeofDCDonmethaneandnitrousoxideemissionsduringricegrowthperiodLIXiang-Lan1,4,MAJing1,4,XUHua1,*,CAOJin-Liu2,CAIZu-Cong1,K.Yagi31InstituteofSoilScience,ChineseAcademyofSciences,StateKeyLaboratoryofSoilandSustainableAgriculture,Nanjing,Jiangsu210008,China2JiangsuPolytechnicCollegeofAgricultureandForestry,Jurong,Jiangsu212400,China3NationalInstituteofAgro-EnvironmentalSciences,Tsukuba305,Japan;4GraduateUniversityofChineseAcademyofSciences,Beijing100049,ChinaActaEcologicaSinica,2008,28(8):3675~3681.Abstract:Traditionally,nitrificationinhibitorisappliedtogetherwithbasalfertilizerbeforetransplantingorseedingofrice.Apotexperimentingreenhousewascarriedouttostudyeffectoftimingofapplicationofnitrificationinhibitor(dicyandiamide,DCD)onmethane(CH4)andnitrousoxide(N2O)emissionsduringthericegrowthperiod.FourtreatmentsintriplicateincludingCK(withoutDCD),TreatmentEA(earlyapplicationofDCDtogetherwithbasal);TreatmentDA(delayedapplication,10daysafterthetopdressingatthetilleringstage),andTreatmentLA(lateapplication,10daysaftertheside-dressing),wereimplementedinthisexperiment.ResultsindicatedthatapplicationofDCDinhibitedbothCH4andN2Oemissions,whichwasreducedby21.41%and8.00%,respectivelyinTreatmentEA,by30.30%and5.24%inTreatmentDA,andby32.65%and11.18%duringtheperiodfromapplicationofDCDtoharvestofthecropinTreatmentDA,butnotmuchaffectedinTreatmentLA.TheCH4fluxinTreatmentsCK,EA,DAandLAwas0.95,0.75,0.87and0.94mg/(m2·h),andN2Ofluxwas155.67,143.24,108.50and153.24μg/(m2·h),respectively.DelayedapplicationofDCDdecreasedCH4andN2Oemissionssignificantly(p0.01).SignificantnegativecorrelationbetweenCH4fluxandsoilEhwasobservedandthefactthatsoiltemperaturewasthemainfactoraffectingN2Oemissionduringthericegrowthperiodwasfound.KeyWords:nitrificationinhibitor;dicyandiamide(DCD);CH4andN2Oemissions;ricepaddysoilCH4N2O。CO2,CO223296[1]。N2O,,N2O,10%,20%[2]。CH4N2O70%~90%,[3]。,CH4N2O、。,CH4N2O。,N2O,。,,NH+4-N,。,NO-2-N、NO-3-N,[4~6]。,(DCD)CH4[7]。,(DCD),10%。DCD[8~10]。,Boeckx[11],DCD47%N2O53%CH4。Weiske[12]3aDCD26%N2O,CH4。。,、,,。,,,DCD,DCDN2OCH4?DCDCH4N2O(DCDCK),、。1 1.1 (31°17′N,119°54′E)。,CN12.6g/kg1.3g/kg,pH6.23,(2~0.02mm)32.6%,(0.02~0.002)42.9%,(0.002)24.5%,CEC16.44Cmol(+)·kg-1。,,25cm,35cm,16kg。611,1028,139d。DCD4:①(CK),,DCD;②DCD,DCD;③DCD,10d(3d);④DCD,10d(65d)。3,12,。3676 28 (611~710)、(711~723)(724~1028)。N、P、K3.74g(270kgN·hm-2)、KH2PO40.84g、KCl0.24g,N∶P2O5∶K2O=2∶1∶1。,50%,KH2PO4KCl;62784,25%。DCD4%。1.3 ,(30cm×30cm×100cm)5cm(5cm)。18ml,10min,4。CH4(GC-12A),N2ONi63(GC-14A)。N2O,CH4。,4℃,SkalarNH+4-NNO-3-N。Eh(10cm)Eh,19d24dEh。、5cm10cm,。1.4 CH4N2OCH4N2O:F=ρVAdCdt273273+T,FCH4N2O,mg/(m2·h)μg/(m2·h);ρCH4N2O,0.714kg/m31.25kg/m3;V(m3);A(m2);dCdtCH4N2O;T,℃。CH4N2O3,CH4N2O3。SPSS(12.0)。2 2.1 CH4N2O1 CH4N2OFig.1 SeasonalvariationsofCH4andN2OfluxesofdifferenttreatmentsduringthericegrowthperiodEAEarlyApplication;DADelayedApplication;LALateApplication;thesamebelow1CH4N2O,CH4N2O33677 8 :DCDCH4N2O 。1,CH4。DCDCH4,CH4(12.01mg/(m2·h))CK(15.97mg/(m2·h)),DCDDCDCH4(14.44mg/(m2·h))15.40mg/(m2·h))。CH4,;CH4。N2O,CK2.31mg/(m2·h)2.29mg/(m2·h)。DCDN2O(2.20mg/(m2·h)2.03mg/(m2·h));DCDN2O,N2O(2.10mg/(m2·h)1.59mg/(m2·h)),DCDN2O(2.33mg/(m2·h)2.21mg/(m2·h),CKN2O)。CK、DCD、DCDDCDCH40.95、0.75、0.87mg/(m2·h)0.94mg/(m2·h),N2O155.67、143.24、108.50μg/(m2·h)153.24μg/(m2·h)。,DCDCH4N2O(p0.01)。2.2 DCDCH4N2O2 DCDDCDCH4N2OFig.2 EffectofDCDapplicationonCH4andN2OemissionsduringthewholericegrowthperiodandduringthedaysfromDCDapplicationtoriceharvest(n=3)BarsindicateSD(n=3)2,,DCD21.41%CH48.00%N2O(CK);DCD30.30%N2O,5.24%CH4;DCDCH4N2O(2a、2c)。DCD,(139d)CH4N2O,DCD,DCDCH4N2ODCDCH4N2O。,CK,DCD32.65%N2O,11.18%CH4;DCD18.41%CH44.98%N2O(2b、2d)。,3678 28 。、DCDN2O,30%;DCDCH4,20%。 3NH+4-NNO-3-N。3,DCDNH+4-N(0~10d)。NH+4-N,,NO-3-N。CK、DCD、DCDDCDNO-3-N42.26,39.54,35.01mg/L43.32mg/L,DCD。NH+4-NNO-3-NN2O,(65d)DCDN2O。3 NH+4-NNO-3-NFig.3 SeasonalvariationsofNH+4-NandNO-3-Nconcentrationsduringricegrowthperiod2.3 EhCH4N2O,EhCH4N2O。30d,,Eh;Eh(4)。CK、DCD、DCDDCDEh582.11、525.90、494.00mV580.02mV,11(4)。DCDEh126.69~137.073mV,CK116.23mV。E
本文标题:DCD不同施用时间对水稻生长期CH4和N2O排放的影响李香兰
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