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土壤的元素构成及含量与土壤质量有密切的联系,土壤地球化学元素的分布特征研究对农业区域发展规划具有重要的参考价值。该文以开封市土壤为研究对象探讨了28种土壤地球化学元素的分布状况。研究采用统计分析、地统计分析、综合比较等方法,找出了研究区内土壤地球化学元素的分布特征。结果表明,开封市表层土壤多数地球化学元素空间自相关性强;水平方向上,不同质地的土壤元素含量差异明显;纵向上,表层土壤地球化学元素区域富集系数普遍偏低,而N、P、K、Corg及重金属元素受人类活动的影响较大表现出局部富集;开封表层土壤多数地球化学元素含量平均值比河南省和全国背景值低,而CaO、MgO、Corg、Na2O、Al2O3含量平均值明显比全国背景值高。
The composition and content of soil elements are closely related to the soil quality. The study on the distribution characteristics of soil geochemical elements has important reference value for the agricultural development planning. This paper explores the distribution of 28 kinds of geochemical elements in Kaifeng soil. The study uses statistical analysis, geostatistical analysis, comprehensive comparison and other methods to find the distribution of soil geochemical elements in the study area. The results showed that the spatial autocorrelation of most geochemical elements in surface soils of Kaifeng City was obvious. The contents of soil elements in different textures were significantly different in the horizontal direction. In the vertical direction, the enrichment coefficients of surface geochemical elements were generally low, while N and P K, Corg and heavy metal elements showed a large enrichment under the influence of human activities. The average content of most geochemical elements in the surface soil of Kaifeng was lower than that of Henan Province and the whole country, while the contents of CaO, MgO, Corg, Na2O and Al2O3 The average is significantly higher than the national background value.