基于GIS的沱江中游土壤全氮空间变异特征及其影响因素研究-论文.pdf

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1、西南农业学报2014年27卷1期SouthwestChinaJoumalofAgriculturalSciencesV01．27Nn1文章编号：1001—4829(2014)01—0204一o6基于GIS的沱江中游土壤全氮空间变异特征及其影响因素研究张楚儿，张世熔’，邓春梅，李婷，徐小逊，(1．i~Jll省土壤环境保护重点实验室，四川成都611130；2．1~Jll农业大学生态环境研究所，四川成都611130)摘要：本研究基于ArcGIS9．3平台，运用地统计学方法研究了沱江中游表层土壤全氮(STN)的空间变异分布特征及影响因

2、素。结果表明，沱江中游土壤全氮含量为(1．06±0．02)g·kg_。，呈对数正态分布；研究区内水稻土(1．43±0．49)g·kg全氮含量极显著高于紫色土(O．93±0．32)g·kgI1(P

3、。关键词：全氮；空间分布；地统计学；影响因素中图分类号：S151文献标识码：ASpatialDistributionCharateristicsofSoilTotalNitrogenandItsInfluenceFactorsinMiddleReachesofTuojiangRiverBasedonGISZHANGChu-er，ZHANGShi-mng，“，DENGChun．mei。，LITing．一，XUXiao—xnn，(1．KeyLaboratoryofSoilEnvironmentProtectioninSichuan

4、Province，SichuanChengdu611130，Cidna；2．Eco—environmentsResearchIn—stitute，SichuanAgriculturalUniversity，SichuanChengdu611130，China)Abstract：Basedonthegeographicinformationsystems，inthispaper，thespatialdistributioncharacteristicsofthesoiltotalnitrogen(STN)andtheinflue

5、ncingfactorsofthesurfacesoilinthemiddlereachofTuojiangriverwerostudiesbytherecallsofgeostafistiesmethod．ThesuhsshowedthattheconcentrationofSTNinthemiddlereachofTuojiangfiverWaS(1．06±0．02)g·kg～andlognormaldistribution．TheSTNconcentrationwassignificantlyhighcrinpaddys

6、oil(1．43±O．49)g·kgI1thanthatinpurplesoft(O．93±O．32)g·kg(P<0．01)．Thespatialdistributionhadthedistinctcharacteristicsofanisotropy，whichtendedtobezonaldistributioninthenorthwestandclumpedinthecentraland8OUthelTlpart．TheSTNconcentrationofdiferentparentmaterialswagsignif

7、icantlyinfluencedbysoilerosionin—tensities(P=0．ooo)anddecreasedwiththeincreaseoferosionstatus．Accordingtothediferenttypesoflandage，theorderofSTNcon—eentrafionfromhightolowWaSvegetablefield，irrigatedland，orchard，aridland，grasslandandforestland．ThereWaSsignificantlyne

8、gativecorrelation(P=O．036)betweenSTNconcentrationandpHandsignificantlypositivecorrelation(P=O．000)betweenSTNconcentrationandorganicmatterc