摘要
以开都河下游灌区为研究区,在野外考察与样品实验分析的基础上,研究绿洲土壤盐渍化各特征值空间分布规律,运用相关分析和回归分析方法研究该绿洲土壤盐渍化特征之间的耦合关系。结果表明：土壤pH值的平均值大于8.0,属于微碱性土壤;土壤含盐量较高,0~10 cm土层中的含盐量最大,平均值达到2.83%;土壤阳离子主要以Na＋、K＋和Mg2＋为主,土壤阴离子主要以SO42-和Cl-为主;土壤含盐量与电导率、TDS之间正相关;通过统计分析表明,土壤溶液电导率和TDS的值可以直接反映土壤含盐量的大小。
Soil salinization is one of primary environmental problems in the sustainable development in the downstream of Kaidu River Irrigation Areas in Xinjiang.Based on field survey,GPS location and soil analysis,soil salinization levels and distribution are investigated,and the characteristics of soil salinization in different spatial changes were analyzed.Using the analysis of correlation and regression to study the relations between the soil compositions,the results showed that the lands in the area are mostly of alkali soil with pH value greater than 8.0 and high in salt content,and salts content rate mostly in the 0～10 cm surface layer,it accounts for 2.83%.Dominated cations in the soil are Na＋,K＋ and Mg2＋,whereas anions in the soil are SO42-and Cl-in the 0～10 cm soil layers.The correlation between Na＋ and Cl-content is positive and extremely significant,between K＋ and HCO3-content significantly positive.All these findings further suggest that the soils are heavy chloride saline soils.The correlation between salt content and conductivity and TDS are positive significant.Regression analysis indicted： the level of soil salinization is indicted by the conductivity and TDS.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第2期147-151,158,共6页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目(41061025)
新疆维吾尔自治区高校科研计划青年教师科研基金项目(XJEDU2009S69)
关键词
土壤盐渍化
土壤特征
土壤含盐量
开都河下游灌区
soil salinization
soil characteristics
soil salt content
the downstream of Kaidu River Irrigation Areas
