【摘要】 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。更多还原

【Abstract】 The research on spatial heterogeneity of soil properties is considered to be an important topic in utilizing and managing soil resources properly. Based on a 1 ∶50 000 soil database, spatial heterogeneity of surface soil (0-20cm) properties (including soil texture, pH, organic matter and CEC) and their affecting factors in the northern Jiangsu Province was analyzed. The results showed that soil pH in the study area was basically higher than 7.0. Spatial distributions of soil organic matter and CEC were similar, which showed that both values in Huai’an were significant higher than those in the other areas. Soil properties were significantly affected by soil type and parent material. In terms of soil group, bog soils had the highest clay content, organic matter and CEC. With regard to parent material, soil organic matter and CEC were higher in soils developed from lacustrine deposit than those from other parent materials. It was concluded that soil type was the dominant factor for the spatial heterogeneity of clay content, organic matter and CEC, while parent material was a key factor for soil pH at the scale of 1∶50 000.更多还原