目的探讨三峡库区食管癌高死亡率区的土壤环境特征。方法对比食管癌高、低死亡率区土壤类型、利用方式及土壤一般特性 ,尤其是在微量元素含量上的差异。结果食管癌高死亡率区土壤主要分布石灰性紫色土 ,土壤偏碱性 ,含钙高 ,土壤肥力低 ;低死亡率区主要是水稻土 ,土壤偏酸性 ,含钙低 ,土壤肥力高。同时食管癌高死亡率区土壤中微量元素含量水平明显低于食管癌低死亡率区。结果食管癌的死亡率高低与土壤中一些微量元素的丰缺有相关性

Objective To study so il env ir onment char acter istics of high_mort ality areas of esopha geal cancer in Three Gorge damregion. Methods To contrast the disparity of soil type, soil use, and basic char acter istics, in particular microelement contents in high_mo rt ality area and low_mor tality area of esophag eal cancer. Results Calcareous purple soils distr ibuted dominant ly in high_mortality area, and soil pH and CaCO3 content was high, and soil fertility low. While paddy soils occupyed mainly in low_mor tality area, and pH and CaCO3 content was low how ever soil fertility high. Moreover, the microelement contents in soils in high_mortality area were lower than those in low_mor tality area apparently . Conclusion M or tality of esophag eal cancer was closely relative to the contents of some microele ments in the soil environment .