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通过对盐渍土主要参数的空间异质性进行分析,反映出绿洲地区各种不同的程度的土壤盐渍化的空间分布。借助地统计学、经典统计学方法,同时结合野外的实测数据,对于田绿洲2013年表层盐渍土(0~10 cm)的电导率、含盐量、p H、含水量的空间异质性进行分析。对研究区的土壤盐渍化监测采样控制在95%的置信水平、15%的相对误差的范围内。研究表明:(1)于田绿洲为重盐土类型,其均值达到7.02 g kg-1,同时表层土壤电导率,含盐量和含水量均表现为较强空间变异性。(2)表层土壤电导率、含水量和含盐量以及p H均表现出由结构性因素引起空间变异。(3)通过插值结果可以看出土壤含盐量、电导率和土壤含水量均表现为绿洲外围高于绿洲内部的空间分布,同时土壤含盐量电导率和p H值三者之间呈明显的正相关。通过分析土壤空间变异性,有利于快速诊断土壤盐渍化,也能够为提升土地的利用效率以及农田的管理提出决策的依据。
By analyzing the spatial heterogeneity of the main parameters of saline soils, the spatial distribution of soil salinization at various degrees in the oasis region is reflected. By means of geostatistics and classical statistical methods, the spatial heterogeneity of conductivity, salinity, pH and water content of surface saline soils (0 ~ 10 cm) Analyze. The sampling control of soil salinization monitoring in the study area is within the range of 95% confidence level and 15% relative error. The results show that: (1) Yutian oasis is of heavy saline soil type, with an average value of 7.02 g kg-1. Meanwhile, surface soil electrical conductivity, salt content and water content show strong spatial variability. (2) The surface soil conductivity, water content and salt content, and p H all showed spatial variability caused by structural factors. (3) The result of interpolation shows that soil salinity, conductivity and soil water content show the spatial distribution of the oasis periphery is higher than that of the oasis, while the soil salt content conductivity and p H value are obvious The positive correlation. By analyzing the spatial variability of soil, it is helpful to quickly diagnose soil salinization, and also can make decision-making basis for improving land use efficiency and farmland management.