第20卷第2期水土保持研究Vol.20,No.22013年4月ResearchofSoilandWaterConservationApr.,2013丹江鹦鹉沟小流域坡耕地土壤属性剖面分布研究徐国策。李占斌】"，王利军3,张铁钢2,黄萍萍之(1.中国科学院水利部水土保持研究所黄土高原土壤侵蚀与早地农业国家重点实验室，陕西杨凌712100,2.西安理工大学,西北水资源与环境生态教育部重点实验室，西安710048；3.内蒙古达拉特旗水土保持工作站，内蒙古达拉特旗014300)摘要：在丹江鹦鹉沟小流域.利用土钻对坡耕玉米地不同深度的水分含址和养分含员进行了采样测定，应用传统统计学和地统计学的方法，对不同深度土壤属性进行了分析。结果表明：总氮和土壤有机碳的均值总体上表现为随土层深度的增加而降低；土壤水分含址姻随土层深度的增加而增加；总磷随土层深度的变化不明显.总氮、土壤水分含量、土壤有机碳和总磷呈中等强度变异和强空间依赖性。在4个采样深度下，半方差模型对总翅、土壤水分含量和总磷在0—10cm和10-20cm的空间结构有很好的模拟精度；土壤有机碳的空间结构则较差.不能用半方差模型进行很好的模拟。经Kriging插值分析.总氤、土壤水分含量和总磷在0—10cm和10-20cm主要呈房状分布；从0—10cm到10-20cm,总氮平均含量由0.598g/kg减小为0.310g/kg,土壤水分含量:和总磷的平均含量则分别从12.988%,0.229g/kg增大到15.439%,0.366g/kg。关键词：坡耕地；总氤；总磷；土壤有机碳；剖而分布中图分类号：S153.6文献标识码：A文章编号：1005-3409(2013)020009-06ProfileDistributionofSoilPropertiesonSlopingCroplandinSmallYingwugouWatershedoftheDanRiverBasinXUGuo-ce*,LIZhan-bin1'2,WANGLi-jun。ZHANGTie-gang2,HUANGPing-ping2（1.StateKeyiMltoratoryofSoilErosionandDrylandFarmingontheLoessPlateau,InstituteofSoilandWaterConservation,ChineseAcademyofSciencesandMinistryofWaterResources.Ycuiglinf!.Shaanxi712100,Chinai2.KeyLabofNorthwestWaterResourcesandEnvironmentEcologyofMOE・Xi'anUniversityofTechnology.Xi'an710048,China;3.SoilandWaterCorservafionStationofDaladBanner.Dalad,InnerMongolia014300,China）Abstract:ThecontentsofsoilwaterandsoilnutrientsonslopingcornlandinYingwugouwatershedweredeterminedforeachsoilsampleoffourdifferentsoildepths.Bothtraditionalandgeostatisticsmethodswereappliedtoanalyzesoilpropertiesinthefourdifferentsoildepths.Theresultsindicatedthatthemeancontentsofsoiltotalnitrogenandsoilorganiccarbongenerallydecreasedwiththeincreaseofdepth.Themeansoilwatercontentrosewiththeincreaseofdepth.Thesoiltotalphosphorusdidnotindicateobviouschangewiththeincreaseofsoildepth.Thetotalnitrogen,soilwatercontent,soilorganiccarbonandtotalphosphorushadmoderatevaria-bilityandstrongspatialdependence.Thespatialstructuresoftotalnitrogen,soilwatercontentandtotalphosphorusin0—10cmlayerand10—20cmlayercouldbemodeledwithahighdegreeofconfidencebysemi-variegramsinthefourdifferentsoildepths.Thesoilorganiccarboncouldnotbemodeledwithahighdegreeofconfidenceforthepoorspatialstructure.TheKriginginterpolationin0—10cmlayerand10—20cmlayershowedthattotalnitrogen*soilwatercontentandtotalphosphoruswerehierarchicaldistributionalongthesoildepth,themeancontentsoftotalnitrogendecreasedfrom0.598g/kgto0.310g/kg»andthemeancontentsofsoilwaterandtotalphosphorusincreasedfrom12.988%,0.229g/kgto15.439%,0.366g/kg,respectively.Keywords：slopingcropland；totalnitrogen?totalphosphorus；soilorganiccarbon；profiledistribution收稿日期：2012-08-09修回日期，2012X）9-12资助项目：国家自然科学基金“植被格局对坡沟水蚀过程调控机理研究项目”（41071182）；陕西省自然科学基金“自然一人工植被对非点源污染过程调控机理试^,,<2011JE008）；陕西高校省级重点实睑室科研项目“植被覆盖与格局变化对非点源污染过程调...