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NN[1-3]。1289.2kg·hm-2·a-1[4]。2171.2t30.26t[4]。2010,29(8):1618-1623JournalofAgro-EnvironmentScience。46.7hm22006840m×80～90m112。TN1.28～6.17g·kg-13.36g·kg-1、NO-3-N3.7～691.7mg·kg-189mg·kg-1。、、。//。、。X833A1672-2043(2010)08-1618-06－121211111.2100082.100049SpatialVariabilityofNitrogeninSoilsinFarmlandAdjacentSuburbanVillagesatNorthernBankofDianchiLakeLUHai-yan1,2,HUZheng-yi1,2,ZHANGRui-jie1,PANGYu-wan1,YINXiao-feng1WUYong-hong11.StateKeyLaboratoryofSoilandSustainableAgriculture,InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008,China;2.CollegeofResourcesandEnvironment,GraduateUniversityofChineseAcademyofSciences,Beijing100049,ChinaAbstractInformationaboutthespatialvariabilityofnitrogenNinsoilsisrequiredforassessingNlossfromfarmlandtowaterbody,anddevelopingrationalNfertilizermanagementpractices.Inthepresentinvestigation,totalof112topsoilsamplesinaregulargridof40m×80~90mwerecollectedfrom46.7hm2farmlandslocatedatthelowerreachofDaqingheonDianchinorthernbankinAug.2006.SoiltotalNrangedfrom1.28g·kg-1to6.17g·kg-1withanaverageof3.36g·kg-1,andfrom3.7mg·kg-1to691.7mg·kg-1withanaverageof88.7mg·kg-1forNO3-N.GeostatisticsanalysisofthesedatademonstratedthatspatialvariabilityofsoiltotalN,soilNO3-Nwereobvious.ThehighsoiltotalNappearedatnortheastleekfields,whichcouldbesewagewater-drivenbecausenortheastfieldsacceptedalargeamountofdomesticsewagefromtheadjacentvillages;however,highsoilNO3-Nappearedatsouthwestflowergreenhousefields,whichmightbeattributedtoex－cessivedosageofNfertilizationinflower-fields,and/ornutrientsenrichmentintoplayersoilduetogreenhouseeffect.Thehightemperaturesandheavyrainyoccurinthesummer,northeastleekfieldsmaybeariskareaforNleachingfromsoilstowaterbodybecauseofmineraliza－tionoforganicN,southwestflowerfieldscouldbeanotherriskareaforNleachingfromsoilstowaterbodywheneverremovingplasticclothofgreenhouse.Presentresultsshowthatthesewagedischarge,croparrangementsandallocationonthelakeshoreofDianchicouldhaveanim－portantinfluenceonlossofnitrogenfromfarmlandtowaterbody,andwaterqualityofDianchiLake.KeywordsDianchiLake;nitrogen;vegetableland;flowerland;spatialvariability;non-pointsourcepollution2010－02－258632005AA6010022006BAJ10B041977—。E－mailhylu＠issas．ac．cnE－mailzhyhu＠issas．ac．cn29889%[5]。、、。、[6]。11.7d≥25mm50％～60％。6—990％5％～10％[7]。。。。、[8]。、[8-9]。。-46.7hm2-。、。11.1--46.7hm2。1.5km3.2km。1100200。90%。260t·hm-2。。N3000~3600kg·hm-2、1000kg·hm-2P2O5、540kg·hm-2K2O。。30～50cm。。1。41。ABC1mg·L-1[10]Table1Waterqualityofsewagewaterforflowingintoagriculturalditchesmg·L-1pHTNNH3-NNO-3-NTPH2PO-4-PCODMn/m3·d-18.42218.76201.8023.61140.8352.82713.12298.068.0628.0618.702.8213.625.7651694.25ABCD161920108D。1.2200680~20cm40m80~90mGPS。121。NO-3-NpHTN、TP、[11]。1.3SPSS10.0ArcGIS9.2[12]。22.1pH、10。21.28～6.17g·kg-13.36g·kg-110%5.2g·kg-175%2.3~4.7g·kg-123.7～691.67mg·kg-188.7mg·kg-110%500mg·kg-180%230~500mg·kg-13。。、。1TN2.3～172.7mg·L-140.5mg·L-1NH3-N0～34.4mg·L-17.5mg·L-1、NO3-N0～7.4mg·L-11.1mg·L-1[10]。N3000～3600kg·hm-2N12241.73kgN·hm-2。。320~20cm104.1mg·kg-120～40cm25.7mg·kg-140～60cm60～80cm29.3mg·kg-135.8mg·kg-1[13]。2.23C0C0+C1。25%25%～75%75%[14-16]。C0/C0+C153.4％20％。、、。2Table2PhysicalandchemicalpropertiesoftestedsoilsK-SpH8.216.807.690.253.3-0.76324.22-/g·kg-12.410.801.360.3425.00.22522.60-/mg·kg-193.832.5626.2517.5967.00.31762.78-/g·kg-16.171.283.360.9829.30.06172.890.82/mg·kg-1691.703.7088.70146.60165.30.46063.170*－16202983Table3Spatialvariationfunctiontheoreticalmodelofsoilnitrogenanditsparameters//mR2RSS0.62061.1610.536.5650.83780.9990.37151.8570.205.3830.91440.3776[14-16]。。3。2.3329.25mg·kg-12[4]。。4。4A、B、C、D1.48～6.173.74±1.14g·kg-1、3.58～5.214.41±0.82g·kg-1、1.52～5.623.58±0.89g·kg-1、1.28～4.602.92±0.80g·kg-1BACD。。BAD。A、B、C、D8.19～117.2353.82±23.16mg·kg-1、17.15～43.7832.49±13.77mg·kg-1、3.68～116.6529.62±25.46mg·kg-1、3.93～691.69157.82±205.43mg·kg-1。DABCA、B、C。。[4]。4。NO-3-N。A、B。[17]。162120108。[18]。。3[4]。[4]。、。。。。1145—10。。。、20%~50%20%~60%[19]。-。。。4。。[20]。14。。。。。。3d90%35d31.8%[21-22]。。4-1.28～6.173.36±0.98g·kg-13.7～691.788.7±146.6mg·kg-1。-。NO-3-N。、。。/。[1],．[J]．,2003,123349-352.XIEHong-mei,ZHUBo.Researchprogressonnon-pointsourcepollu－tionofnitrogeninagro-ecosystem[J].EcologyandEnvironment,2003,123349-352.[2]OnemaO,RoestCWJ.NitrogenandphosphoruslossesfromagricultureintosurfacewatersTheeffectsofpolicesandmeasurementsintheNetherlands[J].WaterScienceandTechnology,1998,3719-30.[3]SmithKA,JacksonDR,PepperTJ.NutrientlossesbysurfacerunofffollowingtheapplicationoforganicmanurestoarablelandNitrogen[J].EnvironmentalPollution,2001,11241-51.[4],.[J].,2003,28-30.DUANYong-hui,ZHANGNai-ming.Analysisoncurrentstatusofruralareanon-pointpollutioninDianchiLakeBasin[J].NatureEcologicalConservation,200328-30.[5].[J].,2002,14161-66.QIANGJi-hong.Summarizingformanagementsofpollutioninwateren－vironmentinDianchi[J].YunnanGeographicEnvironmentResearch,－16222982002,14161-66[6],.,-[M].,200619-21,57,80,87,126,147.CAOZhi-hong,LINXian-gui.Soilqualityseriesofmonographs,TaihuLakebasinmaterialsexchangeofsoil-waterandwaterquality[M].Bei－jingSciencePublishingHouse,200619-21,57,80,87,126,147.[7],,,.[J]