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3133122(1,100085;2,510650).,,;.,Pb,;.1001-9332(2002)02-0159-04X703AArtificalimprovementofsoilfertilityinaregradedforestecosystembyusingmunicipalsewagesludge.LIGuibao1,YINChengqing1,LINYongbiao2,LIZhian2(1StateKeyLab.ofEnvironmentalAquaticChemistry,ResearchCenterforEco2EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085;2SouthChinaInstituteofBotany,ChineseAcademyofSciences,Guangzhou510650).2Chin.J.Appl.Ecol.,2002,13(2):159162.Theincreasingoccurrenceofforestecosystemdegradationisaseriousproblemintropicalandsubtropicalregions.Fieldexperimentsshowedthattheapplicationofsludgefromasewagetreatmentplantcouldnotonlypromotethegrowthandreproductionoftrees,includingtheincreaseintheheightanddiameteroftreesandthusbeingad2vantageoustothegrowthofshrubandherboftrees,butalsoimprovesoilfertilitysuchasincreasingsoilorganicmatterandavailablenitrogenandphosphorus.Thetestofresidualheavymetalsofsoilindicatedthattheapplica2tionofsludgeincreasedthecontentofPbinthesoilandtheincrementofPbwasvariedwiththeincreaseofsludgeusage.Therewasnosignificantincreaseinotherheavymetals.KeywordsSewagesludge,Forest,Soil,Improvement.3(59978051)([1999]10).33.,100038.2001-05-16,2001-09-19.1.,,,,.,115106km2,.,2.,.4167107hm2,1/4[13].,,,.,,,[14].,[3],.,[1,2,8,12],,()(biosolids),.,.,[10].[7,11,17,18],[3,4,6,9,15,16].20022132CHINESEJOURNALOFAPPLIEDECOLOGY,Feb.2002,13(2)159162©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved..221119984,.,11254E,2241N,,2117,1700mm.,,1830,.,,,.(Pinusmassoniana),,.2122:(1).1km,,,8,812m,4181211cm.(Rhodomyrtustomentosa)(Dicra2nopterislinearis.var.dichotoma)(Ilexasprella)(Gardeniajasminoides)(Litsearotundifolia);(Embelialaeta)(Mussaendapubescens)(Baeckeafrutescens);(Dianel2laensifolia)(P.vittata).4:1):1t;2):2t;3):1t;4).51260,100m2,2.(2).115km,,(Cinnamo2mumburmanni)(O1pin2nata).2,111119m,114214cm.3:1):25kg;2):50kg;3):.5.,,.83%,1.,2.13Table1NutrientsandheavymetalsinthesewagesludgeItemO.M.Total2NTotal2P2O5Total2K2OAvail2NAvail2PAvail2KpHSludge311921902176114529311099116-ItemCuZnNiCdCrPbAsHgSludge43315235311011872271126195141221083(O1M1)NPK%,mgkg-11UnitsofO.M.,Total2N,Total2P2O5andTotal2K2Oare%,othersaremgkg-1DW.2Table2NutrientsandheavymetalsinthetestedsoilsForesttypeSoillayer(cm)Totalnutrient(%)O.M.Total2NTotal2P2O5Total2K2OAvailablenutrient(mgkg-1)Avail2NAvail2PAvail2KpH(H2O)02011380106010481124751201133104144Eucalyptusforest204001600104010371152391301128104146020213601090104111521211301143104125Cinnamomumburmani204011370105010361175611501131104135ForesttypeSoillayer(cm)Heavymetal(mgkg-1)CuZnNiCdCrPbAsHg02091351810071000104036170411853317701048Eucalyptusforest204011140351001018001035531105318032108010510202418550100141200106066110351851518301051Cinnamomumburmani20403015217150181700109561198341851519301047212GB9834288,NGB7848287,PGB785228722,KGB78542872;N(N)GB7849287,PGB78532872,GB78562872.CuZnGB/T1713821997,NiGB/T1713921997,CrGB/T1713721997,PbCdGB/T1714121997,CuZnNiCrPb2,Cd2;AsHg2.331115,.,(3).3,1,01366m,2417%,()1118%;306113©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.01208m,1219%.,1154cm,8915%,3011%.,.2,315%,1016%;1,.2.,,.3Table3EffectsofsludgeapplicationonthegrowthofCinnamomumburmaniTreatmentSludgelevelHeight(m)OriginalAftersludgeapplicationIncreaseIncrease(%)Diameter(cm)OriginalAftersludgeapplicationIncreaseIncrease(%)1Low114841185001366241711723126115489152High114061163601230161411803106112670103CK11608118160120812191192310611145914312,(crowndensi2ty),;.,108cm,165cm,110cm,180cm;,9012085156cm,.,.313,.,NP(4),.4,,P,5121819mgkg-1.,P[5].,P,,.314,,.15,5.5,020cmZn;Cr,;Pb3181118mgkg-1;.2040cmPb,.4Table4EffectsofsludgeapplicationonsoilnutrientsForesttypeTreatmentO.M.Total2NTotal2P2O5Total2K2O(%)Avail2NAvail2PAvail2K(mgkg-1)11148010601044113671172113910Eucalyptusforest2116301070104611398314315431031168010701046112876192193810CK1139010601044112570120123010121400110010381128129135154710Cinnamomumburmani2217901120107811481401019125410CK213501090104411301241001340105Table5Effectsofsludgeapplicationontheresidueofheavymetalsinthesoils(mgkg-1)ForesttypeSoillayer(cm)TreatmentCuZnNiCdCrPbAsHg020161754410041850103534100501001810001060Eucalyptusforest271301817581700102529190531801513401054361451814061550103021100451802114201048CK815016150614001030251004210020140010482040251851517591100102023110611751519201040CK10120181009180010242014055180181400104402011916024100101400108037140271901314101046Cinnamomumburmani22711541150141650106539145291901415801057CK2310040140141100106040140251501315001050204022717526150161750104574125331851512301046CK28100181401619001040631003015015100010401612:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.020cmPb,4140mgkg-1;.2040cmZnCrPb611111253185mgkg-1;.,,Pb910%2811%,;Pb,.,,Pb.,,.4411,;.412,(NP),P..413Pb,.Pb,,Pb.1AlexanderNM.1999.RecyclingandcompostingofsolidwasteinRussiancities.Biocycle,(6):68702KrogmannU,BoylesLS,WilliamJB.1999.Biosolidsandsludgemanagement.WaterEnvironRes,71(5):6927143LiG2B(),YinC2Q(),ShanB2Q().2001.Landuseandprospectofsewagesludgeinforestlandandgreenar