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土壤属性空间分异规律的研究是土壤资源合理利用与管理的基础工作。本研究基于1∶5万数据库,分析了江苏北部五市土壤表层(0～20cm)质地、pH、有机质、CEC的空间分异及其影响因素。结果表明,研究区土壤以碱性为主,有机质和CEC的空间分布情况相似,均是西南部淮安市显著高于其他地区。土壤类型与属性有显著相关性,成土母质对土壤属性产生显著影响;对于土类而言,沼泽土的粘粒含量、有机质含量和CEC最高;各成土母质中,湖相沉积物发育的土壤有机质含量和CEC最高。在研究区1∶5万尺度范围内,土壤类型对粘粒含量、有机质含量和CEC起主导作用,成土母质对pH起主导作用。
The study on the spatial variation of soil properties is the basic work of the rational utilization and management of soil resources. Based on the 1: 50000 database, this study analyzed the spatial distribution of soil texture (0 ~ 20cm), pH, organic matter and CEC in five cities of northern Jiangsu and their influencing factors. The results showed that the soils in the study area were mainly alkaline, and the spatial distribution of organic matter and CEC was similar, both of which were significantly higher in Huaian City in the southwest than those in other areas. Soil types and attributes have significant correlations, soil parent material has a significant impact on soil properties; For soil, swamp soil clay content, organic matter content and CEC highest; each soil parent material, the development of lacustrine sediments Soil organic matter content and CEC highest. In the range of 1: 50000 in the study area, the soil types played a dominant role in clay content, organic matter content and CEC, and soil parent material played a dominant role on pH.