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为详细分析流动沙漠咸水滴灌人工绿地土壤盐分的空间分异特征,采用经典统计学和地统学结合的方法,对塔中作业区表层(0~5cm)和亚表层(20~40cm)土壤盐分及各组成离子含量的空间变异性进行系统研究。结果表明:塔中人工绿地表层盐分含量远高于亚表层,呈现强烈的表聚性;半方差函数分析得出表层盐分及离子组成具有极强的空间自相关性和空间异质性,主要受结构性因素(地形、母质、气候等)影响,盐分及组成离子与海拔呈负相关关系,说明人工绿地盐分的空间分布具有海拔梯度性;亚表层盐分的空间分异尺度和格局更具趋同性,随机性因素(灌溉、地下水、植被等)作用显著。Kriging空间插值及空间统计分析表明:在整个纵向沙垄断面,有64.9%的表层土壤发生盐渍化作用,主要为弱盐渍化类型,垄间区较迎风坡和背风坡盐渍化危害更为严重。
In order to analyze the spatial heterogeneity of salinity drip irrigation of artificial desert soils in mobile desert in detail, a combination of classical statistics and geostatistics was used to analyze the effects of drip irrigation on surface soil (0 ~ 5cm) and subsurface (20 ~ 40cm) Salt content and the composition of the ion content of the spatial variability of systematic research. The results showed that the salinity content of artificial green surface in the tower was much higher than that of the sub-surface and showed strong surface aggregation. The semi-variance function analysis showed that the surface salt and ion composition had strong spatial autocorrelation and spatial heterogeneity, The structural factors (topography, parent material, climate, etc.) influence, salt and composition of ions and the elevation was negatively correlated, indicating that the spatial distribution of artificial greenland salinity gradient elevation; subsurface salt spatial differentiation scale and pattern more similar , Random factors (irrigation, groundwater, vegetation, etc.) a significant role. Kriging spatial interpolation and spatial statistical analysis show that 64.9% of the topsoil is salinized mainly in the weak salinization type in the entire vertical sand ridge section, and the harms in the inter-ridge area are more salinized than the windward and leeward slopes Serious.