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1、恩施州耕地土壤剖面理化特征及养分分布变化规律李卫东陈永波*黄光昱张朝阳胡百顺秦邦刘淑琴陈娥熊倩(恩施州硒应用技术与产品开发研究院,湖北,恩施,445000)摘要:对恩施州利川市齐岳山蔬菜、汪营粮食、恩施市芭蕉茶叶基地等3个观测点土壤剖面的理化特征及养分分布规律进行了研究。3个观测点土壤容重在1.23-1.43g/cm3之间,为壤土或砂壤土;电导率23.57-38.83μS/cm,无盐碱化;pH值4.22-6.61,偏酸性或强酸性;有机质12.97-52.88g/kg、铵态氮16.09-31.72mg/kg、有效磷1.59-185.56mg/kg、速效钾0-131.03mg/k
2、g、总硒0.30-1.32mg/kg,属富硒土壤、有效硒0.02-0.23mg/kg,剖面有效养分从表层到底层呈下降趋势,相关系数R2在0.1329-0.9399之间,不同养分差异大,剖面间分布规律基本一致。该项研究是土壤质量长期监测的基础工作,目的是监测不同施肥方式对蔬菜、粮食、茶叶基地土壤质量变化的影响,为修复土壤、提高农产品质量奠定基础。关键词:恩施州土壤剖面;理化特征;养分;分布规律PhysicalandchemicalcharacteristicsandnutrientdistributionofcultivatedlandprofilesinEnshiPrefec
3、tureLIWeidong,CHENYongbo,HUANGGuangyu,ZHANGChaoyang,HUBaishun,QINBang,LIUShuqin,CHENE,XIONGQianEnshiSeleniumApplicationTechnologyandProductDevelopmentResearchInstitute,Hubei,Enshi,445000Abstract:ThephysicalandchemicalcharacteristicsandnutrientdistributionofsoilprofilesofvegetableinQiyuemoun
4、tain,graininWangying-LichuanCityandteainBajiao-EnshiCitywerestudied.Thebulkdensityofsoilat3observationpointsisbetween基金项目:与新西兰林肯大学合作项目-恩施州耕地土壤质量监控与改良技术研发专项。作者简介:李卫东(1961-),男,湖北恩施,正高职高级农艺师,主要从事硒资源开发利用研究,E-mail:360842122@qq.com。通讯作者:陈永波(1967-),男,大学本科,湖北恩施,正高职高级农艺师,现主要从事硒应用技术与产品开发工作,E-mail:545
5、529518@qq.com。1.23-1.43g/cm3,whichisloamorsandyloam.Conductivity23.57-38.83μS/cm,nosalinization.pH4.22-6.61,slightlyorstronglyacidic.Organicmatter12.97-52.88g/kg,Ammoniumnitrogen16.09-31.72mg/kg,Availablephosphorus1.59-185.56mg/kg,Availablepotassium0-131.03mg/kg,Totalselenium0.30-1.32mg/kg,
6、Serichsoil,Availableseleniumwas0.02-0.23mg/kg.Theavailablenutrientsintheprofiledecreasedfromthesurfacetothebottom,thecorrelationcoefficientR2wasbetween0.1329-0.9399,thedifferenceofdifferentnutrientswaslarge,andthedistributionoftheprofileswasbasicallythesame.Thepurposeofthisstudyistomonitort
7、heeffectsofdifferentfertilizationmethodsonsoilqualitychangesinvegetable,grainandteabases,andtolayafoundationforsoilrestorationandimprovementofagriculturalproductquality.Keywords:Enshiprefecture;Soilprofile;Physicochemicalproperties;Totalselenium;Availabl