新疆典型绿洲盐渍化土壤特征分析

Analysis on the Characteristics of Soil Salinization in Typical Oasis in Xinjiang

土壤盐渍化是影响区域生态环境稳定性以及制约农业生产发展的重要因素。对土壤特性进行研究是开展精细农业实践必要的基础研究。本文采用传统统计学方法、相关分析与主成分分析方法,分析新疆典型盐渍化区域渭-库绿洲的土壤含盐量、电导率、TDS、pH值、含水量及主要盐基离子的特征值以及相互之间的关系。结果显示,研究区土壤pH值相对稳定;土壤含盐量具有不均匀分布特征;土壤盐分的分布是有较强的表聚特征。绝大多数时间,矿化度与电导率,电导率与含盐量,SO_4^(2-)、Na^+、Cl^-等离子与表层土壤含盐量之间具有较好的正相关关系,而其他各指标之间的相关关系不太明显。研究区土壤中硫酸盐、氯化物在表层积聚相对强烈;土壤盐渍化类型是属于氯化物型,研究区土壤还在聚盐状态。

Soil salinization is an important factor that affects the eco-environmental stability in the area and restricts the development of agricultural production. Studies on the characteristics of soft are necessary for precision agriculture practices. This paper analyzes soil salt content, conductivity, TDS, pH value, water content and eigenvalues of main base cations as well as their mutual relation in the typical salinization area of Ogan-Kucha oasis in Xinjiang, through traditional statistics, correlation analysis and main component analysis, The results show that, the pI-I value of soil in the study area is relatively stable; salt content of soil is characterized by uneven distribution ; salts accumulate at the surface soil intensively. In most cases, mineralization and conductivity, conductivity and salt content, ions such as SO4^2-, Na＋, Cl- and salt content of surface soil have good positive correlations, while the correlations between other indexes are less evident. Sulfates and chlorides in soil in the study area accumulate intensively at the soil surface; soil salinity is of chloride type and soiLsaIts still accumulate in thel study area.