甘肃景电灌区次生盐化土壤的性质及其发生机理

Properties and genetic mechanisms of the secondary salinized soils in Jingdian irrigation area of Gansu Province

本文对甘肃景电灌区次生盐化土壤的理化性质进行了研究 .该区次生盐渍化土壤主要为硫酸盐氯化物和氯化物硫酸盐型 ,水溶性钠离子在阳离子中占绝对优势 .土壤通体碳酸钙含量很高 ,并有少量的石膏 .钠离子饱和度很高 ,具有钠质特性或钠质化现象 ,盐化与钠质化同时进行 .

The secondary salinezed soils in Jingdian irrigation area were investigated. The salinized soils were classified as the types of chloride-sulfate and sulfate-chloride and water soluble cations were mainly sodium in the soils. Ca carbonate contents in the whole profiles were high and a low amount of gypsum was found. The saturation of Na was also high, thus the soils were solonized by sodium and the solonization was accompanied by salinization.