涟源富硒土壤研究与湖南省富硒土壤分布初探

在部省合作"湖南省娄邵盆地多目标地球化学调查"项目的资助下,系统地采集测试了涟源市耕地和园地的表层土壤样品。调查发现该地区发育了大量的富硒土壤,富硒土壤的来源主要与震旦系上统—寒武系下统和二叠系中上统的黑色岩系有关。上述黑色岩系分布区域的表层土壤具有全区最高的硒含量,均大于1 mg/kg,部分甚至达到硒过量的水平。经文献研究和综合评价,推断黑色岩系风化物质扩散堆积形成的山间盆地是湖南省快速高效的寻找富硒土壤的理想靶区。

Selenium-rich Soil Research in Lianyuan County and Preliminary Study for Distribution of Selenium-rich Soil in Hunan

Top soil samples of Lianyuan farmland and garden plot were calculated when multi-purpose geochemical survey project of Loushao basin executing. Based on testing results, it can be concluded that, existing so many selenium-rich soils which derived from weathering of black rock series in upper Sinian System-lower Cambrian and upper Permian. And the average selenium content of top soils in these selenium-rich strata more than 1 mg/kg, even selenium excess on some samples. Results of literature research and comprehensive research make clear the selenium-rich characteristics of the intermountain basin which compiled weathering products of the above selenium-rich strata, and a preliminary study of distribution of selenium-rich strata and soils in Hunan was completed.