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于田绿洲土壤盐渍化日趋严重,直接影响当地农业发展和生态环境建设。本文选取于田绿洲中不同土地类型的土壤垂直剖面,对土壤盐分、可溶性离子及其相应地下水各个离子、矿化度进行测定;运用统计特征值、趋势面等方法进行分析。结果表明,于田地区盐渍化程度较为严重,可用耕地较少。农田盐渍化程度远低于其它土地类型区。盐渍化区土壤盐分垂直剖面上表现为漏斗型,表聚现象明显;农田、交错带盐分垂直剖面上表现为上下剖面盐分含量大,中部含量小,表明这片区域排碱能力较好。并且盐渍地相对于农田,含盐量及一些主要离子的空间变异性远远超出农田变异,并且不同土壤的盐分特征明显不同。上述研究为于田绿洲生态环境改善提供了一定的理论基础。
Yutian oasis soil salinization increasingly serious, a direct impact on local agricultural development and ecological environment. In this paper, we select the vertical profiles of soils from different land types in Yutian Oasis and measure the ions and salinities of soil salinity, soluble ions and their corresponding groundwater. The statistical eigenvalues and trend surfaces are used to analyze the results. The results showed that the degree of salinization in Yutian area is relatively serious, and available cultivated land is less. The degree of salinization of farmland is much lower than that of other land types. The salt profiles in the salinization area showed a funnel-shaped vertical profile, and the phenomenon of surface aggregation was obvious. In the vertical profiles of the salt fields in the farmland and ecotone, the salinity content in the upper and lower profiles was large and the content in the middle part was small, indicating that the alkalinity in this area was better. Compared with farmland, salinity and some main ions have salinities far beyond the farmland variation, and the salinity characteristics of different soils are obviously different. The above research provides a theoretical basis for the improvement of ecological environment in Tian Oasis.