本文总结我国九个经济自然区土壤背景图编制的经验认为:应以影响土壤元素含量区域分异的主导因素或综合因素作为划分制图单元的依据。例如:土壤类型(亚类或土属)、土壤分区、成土母质(山区为母岩,平原为沉积物的成因或土壤质地)、地貌类型(地貌形态或不同水系沉积物)。 This paper summarizes the experience of compiling soil background map of nine economic and natural regions in our country. It is concluded that the dominant factors or comprehensive factors that affect the regional differences of soil element content should be taken as the basis for the division of cartographic units. For example: soil type (sub-class or soil genus), soil subdivision, soil parent material (mountain rock, plains as sediment causes or soil texture), landform types (topography or different sediments).