根据在中国除台湾省外约 9.6× 1 0 6km2 范围内采集的 4 0 95个土壤样品中砷的分析结果 ,揭示了中国土壤砷的背景含量和分布特征 ,以及土壤中砷与共生元素和有机质等之间的相关关系 ,并且结合环境因素和砷的地球化学性质 ,从宏观与微观两方面讨论了它们的形成原因 Based on the results of arsenic analysis of 4 095 soil samples collected in an area of ​​9.6 × 10 6 km 2 outside of Taiwan Province of China, the background contents and distribution characteristics of arsenic in soils in China are revealed, and the contents of arsenic, symbiotic elements and organic matter Etc., and in combination with the environmental factors and the geochemical properties of arsenic, discussed the formation reasons of them both macroscopically and microscopically