新疆克里雅绿洲土壤盐分、pH和盐基离子空间异质性分析

发布时间：2018-03-08 20:16

本文选题：土壤盐分　切入点：盐基离子　出处：《土壤》2017年05期 　论文类型：期刊论文

【摘要】：以克里雅绿洲盐渍化土壤为研究对象,以野外调查与实地数据为基础,采用空间自相关分析与径向基函数插值法,定量分析了克里雅绿洲土壤的含盐量、pH及盐基离子的空间异质特征。结果表明:绿洲盐渍土表聚性强、呈碱性,土壤含盐量从南至北呈现逐渐增大趋势。土壤含盐量、Na~+、Ca(2+)、K~+、Mg2~+、Cl 、SO_4~(2-)均属于强空间变异,HCO_3~ 属于中等强度的空间变异,而pH属极弱变异。土壤盐分含量、pH和盐基离子的Moran’s I指数均通过了显著性检验,研究区土壤含盐量、p H与盐基离子在空间上呈现低聚集性。Pearson相关性分析结果显示,土壤盐分含量与Na~+、K~+、Cl~ 和SO_4~(2-)含量具有强正相关性(P0.01),与Ca~(2+)和Mg~(2+)含量中等程度正相关(P0.05);土壤pH与土壤含盐量及盐基离子含量极弱相关。该研究结果可为绿洲水资源合理开发与农业可持续发展提供科学依据,同时可作为盐渍土改良和沙漠化防治等环保工作的决策支撑。
[Abstract]:Based on field investigation and field data, spatial autocorrelation analysis and radial basis function interpolation were used to study salinized soil in Kriya oasis. The spatial heterogeneity of salinity, pH and basic ions in the soil of Kriya oasis was analyzed quantitatively. The results showed that the salt soil in the oasis had strong surface aggregation and alkalinity. The salinity content of soil is gradually increasing from south to north. The soil salt content (Na ~ + Ca ~ (2)) (K ~ (2) mg _ (2) C _ (2) C _ (2)) is a strong spatial variation and HCO3 ~ + belongs to a medium intensity spatial variation. The soil salt content, pH and Moran's I index of base ions passed the significance test. The correlation analysis of soil salinity, pH and base ions in the study area showed that there was a low concentration of pH and base ions in space. There was a strong positive correlation between soil salt content and Na ~ + K ~ + Cl ~ + and so _ 4 ~ + _ 2) contents (P _ (0.01), Ca~(2) and Mg~(2 (P _ (0.05)), and soil pH had a very weak correlation with soil salt content and base ion content. The results showed that this study could be regarded as oasis water. Rational exploitation of resources and sustainable development of agriculture provide scientific basis, At the same time, it can be used as decision support for environmental protection work such as saline soil improvement and desertification control.
【作者单位】：新疆大学旅游学院;新疆大学绿洲生态教育部重点实验室;新疆大学资源与环境科学学院;
【基金】：国家自然科学基金重点基金联合项目(41561089,41461111,U1138303)资助
【分类号】：S156.4

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