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针对天津市大港地区的盐渍化土壤,采用相关性分析和主成分分析法对其土壤盐渍化特征进行了研究,并根据土壤盐渍化特征,利用陶粒、蛭石和沸石3种材料在树坑周围作隔离层,在大田进行植树造林的田间试验.结果表明,大港区土壤盐渍化类型属于氯化物型,Cl-、K++Na+、Ca2+、Mg2+是该地区盐渍化状况的特征因子,且主要影响因子为K++Na+、和Cl-离子;3种改良措施均表现出显著的降盐效果,陶粒、蛭石和沸石的降盐率分别为17.478%、32.856%、58.559%.沸石作隔离层不仅降盐效果好,且能够抑制土壤碱化,使土壤密度变小、土壤孔隙增大.
According to the salinization soil in Dagang area of Tianjin, the soil salinization characteristics were studied by using the correlation analysis and principal component analysis. According to the salinization characteristics of soil, three kinds of materials, ie, ceramsite, vermiculite and zeolite The results showed that the soil salinization type in Dagang belongs to the chloride type, and Cl-, K ++ Na +, Ca2 + and Mg2 + are the salinization conditions in the area The main influencing factors were K + + Na + and Cl- ions. The three improvement measures all showed significant salt reduction effect. The salt reduction rates of ceramsite, vermiculite and zeolite were 17.478%, 32.856% and 58.559, respectively The zeolite as the isolation layer not only has a good effect of reducing salt, but also inhibits the alkalization of the soil, making the density of the soil smaller and increasing the porosity of the soil.