腐解黑藻生物量对高硝态氮水体氮素的影响王博

王博1,2,叶春2*,杨劭1,冯冠宇2,洪涛2,赵良元11.,,4300792.,100012:,Q()15mgPL,,32d.,Q()Q()U,210g(01111kgPm2),Q()Q().,,Q(TOC)PQ(),Eh,,.:;;;;:X524:A:1001-6929(2009)10-1198-06EffectofHydrillaverticillataDecompositionBiomassonNitrogenContentinWaterContainingHighConcentrationofNitrateWANGBo1,2,YEChun2,YANGShao1,FENGGuan-yu2,HONGTao2,ZHAOLiang-yuan11.HubeiKeyLaboratoryofUrbanAquaticEnvironmentalEcology,CollegeofLifeScience,CentralChinaNormalUniversity,Wuhan430079,China2.ResearchCenterofLakeEcologicalEnvironment,ChineseResearchAcademyofEnvironmentalSciences,Beijing100012,ChinaAbstract:Adecompositionexperimentwithacommonsubmergedmacrophyte,Hydrillaverticillata,wascarriedoutforaperiodof32days,byintroducingsedimentsfromTaihuLakeatQ(NO3-)contentof15mgPLintheoverlyingwater.Thetemperatureofearlyspringwassimulatedwhensubmergedplantsweredecomposedinlarge-scale.TheresultsshowedthattheimpactofHydrillaverticillatadecompositiononnitrogenconcentration(Q(NO3-)andQ(NH4+))inwaterwasU-shaped.Thenitrogenconcentrationwaslowestundertheexperimentalconditionswhenbiomassdecompositionwas210g(equivalentto01111kgPm2).WiththedecompositionofHydrillaverticillata,thereleaseoforganicmatterandnitrogenintothewaterincreased;however,atthesametime,theQ(TOC)PQ(NO3-)ratioincreased,Ehlowered,andmicrobialactivityincreased,whichwereconducivetotheoccurrenceofdenitrification.Keywords:submergedmacrophytedecay;Hydrillaverticillata;biomass;organiccarbonsource;denitrification:2009-03-16:2009-05-18:(2008ZX07101-009):(1983-),,,mygoddness@1631com.*,(1970-),,,,,,yechbj@1631com,[1].[2].,[3].,(),,.[4].,[5].,.,,[6-7],,[8],.,2210200910ResearchofEnvironmentalSciencesVol.22,No.10Oct.,2009DOI10.13198/j.res.2009.10.88.wangb.012,.,,,,,.,,))),,.11.1)))(Hydrillaverticillata),,105e65e.,w(TOC)2109%,w()3105mgPkg.:,,.,4e.1.23L,250g,215L,01018m21012,015,110,210,410810g,30Lm.,,.7,2,14.,KNO3Q(NO3-),Q(NO3-)15mgPL.,,30%,15e.0,015,1,2,4,8,1632d.Q(),Q(),Q(TOC)Eh.().,,,w(TOC)w().1.3Q();Q()[9];Q(TOC)TOC-VCPHTOC;EhThermoorion3starpH.w(TOC)[10];w(),KDY-9820[11].(TTC)[12-13].OriginProv8.0724,SPSSv1610122.1Q(TOC),Q(),Q()Eh1,Q(TOC),1m()2Q(TOC).8.0gQ(TOC),410g,2Q(TOC),Q(TOC).Q(TOC),410g810g,Q(TOC).810g16Q(TOC),410g4,2.m()Pg:1)0;2)012;3)015;4)110;5)210;6)410;7)8101Q(TOC)Fig.1TOCinwaterwithsubmergedmacrophytes2,Q(),410g810gQ(),,,Q().410g810gQ()2d,.16.3,1Q(TOC)PQ()2,810g,810g119910:m()Pg:1)0;2)012;3)015;4)110;5)210;6)410;7)8102Q()Fig.2NO3-inwaterwithsubmergedmacrophytesm()Pg:1)0;2)012;3)015;4)110;5)2103Q(TOC)PQ()Fig.3Q(TOC)PQ(NO3-)inwaterwithsubmergedmacrophytesm()Pg:1)0;2)012;3)015;4)110;5)210;6)410;7)8104Q()Fig.4NH4+inwaterwithsubmergedmacrophytes32,3.4Q().4,,Q(),410g810g.Q(),.,410g810gQ(),Q(),Q().16Q()16.5,Eh,Eh.210g,410g810gEh16,8Eh,Eh,410g810gEh.m()Pg:1)0;2)012;3)015;4)110;5)210;6)410;7)8105EhFig.5Ehinwaterwithsubmergedmacrophytesm()Pg:1)0;2)012;3)015;4)110;5)210;6)410;7)8106Fig.6Theactivityofdehydrogenaseofthesediment,[14],,,.,[15].6,,.810g.16,,16,120022,.2.2TOC,TOC.TOC(P0101),y=010158x(R2=019931)y=011347x(R2=01993),TOCTOC,TOC.,TOC,TOC.1TOCTable1TOCandTNemissionswithsubmergedmacrophytesgPgTOC0120100540100380104601032501501013601007901116010672110010272010170012320114512100105440102890146401246141001108801055901928014764810012176011305118561111352.3w(TOC)w()7w(TOC)Fig.7TOCinsedimentattheendofexperiment.7,,w(TOC),w(TOC),,.w(TOC),,w(TOC).810g,w(TOC)2174%.8,w(),w(TOC),w(),.810g,w()3148mgPkg.,,,w(TOC)w().8w()Fig.8TNinsedimentattheendofexperiment33.1TOC,TOC,,TOC.1,2,Q()(P0101).Q(TOC),Q().14,,TOC,TOC.Q()TOC.,.,Q(TOC)[16].Q(TOC),.,,.,.,,?./--0,,120110:,,,.,,.,32Q()Q()(9),210gQ()Q().,,(012~210g),Q(),,;410g810gQ(),,.9Q()+Q()Fig.9Q(NH4+)+Q(NO3-)inwaterwithsubmergedmacrophytes,,,[17-18].,,,[19-20].,,,,.,.,.,210g,Q()Q(),01111kgPm2.3.2TOC,.23,,,.,Q().,,.,,.,.,.,.Q(TOC),,,,,[21].[22-23],5,90%,.5,,,.,Eh,,.Q()(2),.,,[24-26].3.3,,,,..,,,,Q(TOC);,Eh,,,,.,(P0101).TOC.,,,.,120222,,.[27],,,,.,;,,.,[28].,,,[29-30].,,.,,.,,,,.,.4a.Q()Q(),,Q()+Q()U.,210g(01111kgPm2),Q()+Q().b.,,Eh,,,.(References):[1],,.[J].,2008,21(1):59-63.[2],.[J].,2007,14(5):350-355.[3],.[J].,2006,26(5):69-71.[4],,.[J].,2008,21(1):64-68.[5],.[J].,1999,10(1):106-112.[6]CRAFTCB,BROOMESW,SENECAED,etal.Estimatingsourcesofsoilorganicmatterinnaturalandtransplantedestuarinemarshesusingstableisotopesofcarbonandnitrogen[J].EstuarCoastShelfSci,1988,26:633-641.[7]WILSONJO,BUCHSBAUMR,VALIELAI,etal.DecompositioninsaltmarshecosystemsphenolicdynamicsduringdecayofSpartinaalterniflora[J].MarEcolProgSer,1986,29:177-187.[8]CASTROP,FREITASH.FungalbiomassanddecompositioninSpartinamaritimeleavesintheMondegosaltmarsh(Portugal)[J].Hydrobiologia,2000,428:171-177.[9].[M].4.:,2002:258-284.[10].[M].3.:,1999:25-35.[11],.[M].:,1987:183-186.[12].[M].:,1980:87-91.[13].[M].:,1986:331-332.[14]NELSOND,JOED.UseofmicrobialenzymesindetectingpollutioninestuarineenvironmentinGoa[J].PollutRes,1999,18(3):315-320.[15],.Mo6+[J].,2006,23(2):223-227.[16]BASTARDOH.Laboratorystudiesondecompositionoflittoralplants[J].PolArchHydrobiol,1979,26:267-299.[17]REJMANKOVHAE.Wetlandmacrophytedecompositionunderdifferen