低铵污水灌溉下土壤中硝化作用试验研究吴俊锋

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  (江苏省环境科学研究院 南京210036)  (河海大学环境科学与工程学院 南京210098)  ,(50mg/LNH4C1),,。:30cm,NO3-N30cm。,,100cm10mg/L,40cmNH4-N。 低浓度铵 污水灌溉 土壤 硝化作用ExperimentalstudyofNifrationFunctioninSoilUnderLowAmmoniumWastewaterIrrigationWuJungfengWangYanfengLiYongAbstract Formodelingofnitrationfunctioninsoilunderlowammouiumconcentrationwastewaterirrigationcondition,ammoniumsaltsolution(50mg/LNH4Cl)isemployedincontinuousdrenchingsoil,whileverticalsoilpoleexperimentalstudyiscarriedout,andtheconcentrationsofNcompoundatdifferentsoilpoledeptharedetermined.Resultsindicatethatnitrationfunctioninsoilsolutionunderlowammoniumconcentrationwastewaterirrigationishappenedchieflywithin30cmwithpeakvalueofNO3-Nconcentrationaround30cm.Soonafterwardsduetodenitrificationetc,concentrationreducesrapidlywithreductiontoabout10mg/Laf100cmdepthandnoNH4-Nisdeterminedundersoilof40cm.Keywords Lowconcentrationammoniumwastewaterirrigation Soil Nitrationfunction  ,、、、。,、。1 1.1 土柱试验装置1。100cm,12.5cm,10.5cm。20cm1,,,。。,2cm。,1。,,,,,2mm。2mm,,20℃。1 ,。Ca,0.05mol/LCaSO4,,Ca2+Ca2+。1 (cm)(g/cm3)pH(%)(0.05mm)(0.05~0.002mm)(0.002mm)0~301.446.744.8838.9016.22—4—/1.2 试验及分析方法50mg/LNH4Cl,6.5cm/d。,。,、。,N—1—,。2 NH4CL,,10d、20d、25d30d,2。2 NH+4-NNO-3-N  2,10d20d,,25d。(0.1mg/L),。,。。40cmNH+4,,NH+4。,t=25d,30cm50mg/L5mg/L,,0mg/L31mg/L。NH+4-N30cm,NO-3-NNH+4-N。30cm,。,,,NH+4-N。NO-3-N,NO-3-N,,。3 (50mg/L),NO-3-N30cm,,,100cm10mg/L。40cmNH+4-N,,NH+4。,,。   1 ,..:,1998.2 ..,1988,9(1):42~47.3 .[M].:,1980.4 ,.、..1996,11(3):251~260.5 OssenbuggenPJetal.Designingexperimentsformodelidentificationofthenitrificationprocess[J].Wat.Sci.Tech.,1997,24(6):9~16.6 RoyF.Spalding,DarrellG.Wattsetal.ControllingNitrateLeachinginIrrigatedAgriculture[J].J.Environ.Qual.,2001,Vol.30:1184~1194.7 ,,.NO-3N..2000,14(3):71~74.(:2003—03—10)—5—162                                   20036

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