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1、天津农业科学TianjinAgriculturalSciences2014，20（5）：64-70土壤肥料与节水灌溉东北芦苇湿地土壤有效硅与pH值及物质组成的关系11，2，31111史吉晨，介冬梅，李思琪，王嫒林，牛莉平，卢美娇（1.东北师范大学地理科学学院，吉林长春130000;2.国家环境保护湿地生态与植被重点实验室，吉林长春130024；3.东北师范大学草地研究所植被生态科学教育部重点实验室，吉林长春130024）摘要：为探究土壤有效硅与土壤pH值及物质组成的关系，在东北地区选12个样点，采集1195个土壤样品，运用硅钼蓝比色法进行有效硅含量测定，用重铬酸钾-硫酸溶液对有机质进行测定，用
2、pH计对酸碱度进行测定，运用ICP法进行阳离子测定。研究结果表明：在湿润地区土壤pH值与有效硅为正相关，在半湿润半干旱地区，pH值与有效硅为负相关；有机质在湿润地区和雨季时间段与有效硅呈现正相关，在半干旱地区与有效硅为负相关，但关系复杂并非简单线性相关关系；钾钠比与有效硅正相关，而钙镁比与有效硅负相关。关键词：土壤有效硅；有机质；pH值；东北地区中图分类号：D564+.2文献标识码：ADOI编码：10.3969/j.issn.1006－6500.2014.05.14RelationshipBetweentheAvailableSiliconoftheSoilandpHandMaterialCo
3、mpositionoftheSoilintheReedWetlandinNortheastAreaofChinaSHIJi-chen1，JIEDong-mei1,2,3;LISi-qi1,WANGAi-lin1,NIULi-ping1,LUMei-jiao1（1.SchoolofGeographicalScience,NortheastNormalUniversity，Changchun,Jilin130000,China;2.StateEnvironmentalProtectionKeyLaboratoryofWetlandEcologyandVegetationRestoration,Ch
4、angchun,Jinlin130024,China;3.InstituteofGrasslandScience,NortheastNormalUniversity,KeyLaboratoryforVegetableEcologyMinistryofEducation,Changchun,Jilin130024,China）Abstract:In12sitesofnortheastern,1195soilsampleswerecollectedfortheresearchonrelationshipbetweentheavailablesili-conofthesoilandpHandmate
5、rialcompositionofthesoil.Theavailablesiliconcontentwasdeterminedbyusingsiliconmolybde-numbluespectrophotometer.ThesoilcationwasdeterminedbyICPmethod,andpHwasdeterminedbyPHmeter.TheresultshowedthattherewasapositivecorrelationbetweenpHandtheavailablesiliconofthesoilinhumidarea.Therewasanegativecorrela
6、tionbetweenpHandtheavailablesiliconofthesoilinthedryarea.Inthehumidareaduringtherainyseason,organicmat-terhadapositivecorrelationtotheavailablesilicon.Ontheotherhand,organicmatterhadanegativecorrelationtotheavailablesiliconinthesemiaridzone,buttherelationwascomplexandtheydonothaveasimplelinearrelati
7、onship.TherewasapositivecorrelationbetweentheradioofKandNaandanegativecorrelationbetweentheradioofCaandMg.Keywords:theavailablesiliconofthesoil;organicmatter;pH;thenortheastarea硅是地壳中含量第2的元素，是绝大多数植官的分布
