贵州省水城县耕地土壤硒元素地球化学特征及富硒农业应用

Geochemical Characteristics of Soil Selenium and Its Application in Selenium-rich Agriculture in Shuicheng County,Guizhou Province

基于贵州省水城县耕地质量地球化学调查评价项目,研究分析了土壤中硒含量分布特征及其与成土母质、土壤类型、土地利用现状以及农作物含量之间的关系。结果表明:研究区土壤硒含量均值为0.63 mg/kg,耕地土壤硒含量以二级为主,面积占65.19%,富硒耕地占88.35%,主要因成土母质差异,不同土壤类型对硒元素富集程度不同,不同土地利用现状土壤硒含量有差异。土壤硒含量与有机质、氮、磷、锰、钼、碘、锗、汞、镉、砷呈显著正相关,与钾、硼、氟、酸碱度呈显著负相关。大类农作物玉米具有富硒效应,安全性高。

Based on the geochemical investigation project of cultivated land quality in Shuicheng county,Guizhou province,the spatial distribution characteristics of Selenium content in soil and its relationship with the parent material,soil type and land-use status classification and the content characteristics of crops were matically studied and analyzed.The results show that:The average soil Selenium content in the study area is 0.63 mg/kg,the content of Selenium in cultivated land was mainly secondary,with an area of 65.19%,and the cultivated land rich in Selenium accounts for 88.35%,it is mainly due to the difference of parent material of soil,different soil types have different enrichment degree of Selenium,the content of Selenium in soil varies with different land use status.Soil Selenium content was positively correlated with organic matter,Nitrogen,Phosphorus,Manganese,Molybdenum,Iodine,Germanium,Mercury,Cadmium and Arsenic,and negatively correlated with Potassium,Boron,Fluorine and p H.Major crops corn has Selenium-rich effect and high safety.