三峡库区食管癌高死亡率区的土壤环境特征研究

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。同时食管癌高死良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。

Study on Soil Characteristics of High-mortality Area of Esophageal Cancer in Three Gorge Dam Region

Objective To study soil environment characteristics of high_mortality areas of esophageal cancer in Three Gorge dam region. Methods To contrast the disparity of soil type,soil use,and basic characteristics,in particular microelement contents in high_mortality area and low_mortality area of esophageal cancer. Results Calcareous purple soils distributed dominantly in high_mortality area,and soil pH and CaCO3 content was high,and soil fertility low. While paddy soils occupyed mainly in low_mortality area,and pH and CaCO3 content was low however soil fertility high.Moreover,the microelement contents in soils in high_mortality area were lower than those in low_mortality area apparently. Conclusion Mortality of esophageal cancer was closely relative to the contents of some microelements in the soil environment.