浙北平原富硒土壤资源区硒来源的定量分离

明确硒元素含量不同来源组分(自然背景组分和外源输入组分)贡献率是评价富硒土地资源是否具有可持续利用性的前提.以嘉兴市秀洲富硒土地资源区为研究区域,通过地学分析和多元统计交互验证,将该区域土壤硒来源定性分离为自然背景组分和含外源输入组分,并采用频数分布函数为工具,对硒含量不同来源组分的贡献率进行定量分离.结果表明,秀洲区富硒土地硒含量来源自然背景组分的贡献率占90%,外源输入组分占10%,表明秀洲区富硒土地资源具有可持续开发利用的潜力.

Quantitative Partitioning of Soil Selenium in the Selenium-Rich Area of Northern Zhejiang Plain

To clarify the contribution of different component of selenium is the basis for evaluation of the sustainable development and utilization of selenium-rich soil. Xiuzhou district, where the soil is rich in selenium, was chosen as the study area, and its soil selenium content was qualitatively separated as the natural background component and the exogenous component through cross-validation of integrated geo-analysis and multivariate statistics. Subsequently, the contribution rate of the different component of the selenium content was separated quantitatively using frequency distribution functions. The results showed that the natural background component accounted for 90% in the soil selenium content and the exogenous component accounted for 10%, which indicated that the land sources rich in selenium in Xiuzhou district has the potential for sustainable development and utilization.