贵州省六枝特区土壤硒分布特征及评价研究  

Characteristics and Evaluation of Soil Selenium Distribution in Liuzhi Special District,Guizhou Province

作　　者：姚玲[1] 潘启权[1] 王大福 万大学[1] YAO Ling;PAN Qi-quan;WANG Da-fu;WAN Da-xue(105 Geological party,Guizhou Bureau of Geology and Mineral Exploration and Development,Guiyang 550018,Guizhou,China)

机构地区：[1]贵州省地矿局105地质大队,贵州贵阳550018

出　　处：《贵州地质》2020年第3期366-371,共6页Guizhou Geology

基　　金：贵州省六枝特区耕地质量地球化学调查评价项目(黔地矿耕调2017-03)。

摘　　要：本次研究在贵州省耕地质量地球化学调查评价的基础上,结合本单位承担的调查项目,优选出硒资源潜力丰富的六枝特区耕地为研究对象,根据研究区富硒土壤划分根据《土地质量地球化学评价规范》(DZ/T 0295-2016)和贵州省富硒土壤评价分级标准(试行),采用多种地球化学分析测试方法对研究区进行了硒含量及分布特征评价,结合五种农作物硒含量分析结果,初步查明了研究区内基岩和各类土壤硒背景值,根据硒含量初步划定了区内不同富硒区范围,为富硒土壤资源的开发利用提供了参考依据。结果表明:研究区土壤硒含量值处于0.047-5.3 mg/kg之间,平均含量0.54 mg/kg,总体接近背景值。研究区基岩硒含量值有一定差异,表现为二叠系上统含煤岩系中硒含量最高,平均值0.98 mg/kg,高于周缘耕地土壤硒含量,指示出该地层可能提供部分硒;侏罗系粘土岩分布区中硒含量最低,平均值0.20mg/kg,低于区域耕地土壤硒含量。综合解读分析测试数据,初步圈定区内富硒土壤面积约72.36万亩,占全区耕地面积的73.79%,其中可开发面积约67.29万亩,具有发展富硒产业的良好基础,本次研究对于调整区内富硒农作物种植结构、发展特优农作物种植,增加就业和脱贫攻坚战略目标具有重大意义。Based on the geochemical survey and evaluation of cultivated land quality in Guizhou province and the investigation project undertaken by this unit,six special zones with rich selenium resource potential were selected as the research object.According to the classification of selenium-rich soil in the study area,the selenium content and distribution characteristics of the study area were evaluated by various geochemical analysis and test methods according to the“criteria for geochemical evaluation of land quality”(DZ/T 0295-2016)and the criteria for evaluation and grading of selenium-rich soil in Guizhou province(trial).The scope of different selenium-rich areas in the area was preliminarily delimited,which provides a reference for the development and utilization of selenium-rich soil resources.The results showed that the soil selenium content in the study area was between 0.047-5.3 mg/kg,and the average content was 0.54 mg/kg,which was close to the background value.According to the results,the content of selenium in the upper Permian coal-bearing rock series is the highest,the mean value is 0.98 mg/kg,higher than the soil selenium content in the surrounding cultivated land,indicating that the formation may provide partial selenium;the distribution area of Jurassic clay rock has the lowest selenium content,and the average value is 0.20 mg/kg,lower than that in the regional cultivated land soil selenium content.This study is of great significance for adjusting the structure of selenium-rich crops,developing special crops,increasing employment and overcoming poverty.

关 键 词：硒 分布特征 富硒标准 六枝特区 

分 类 号：P632[天文地球—地质矿产勘探] S159[天文地球—地质学]