As、Hg元素对土壤环境质量和农产品质量安全的影响

The Effects of Arsenic and Mercury on Soil Environmental Quality and the Quality Security of Agricultural Products

为探讨土壤环境中As、Hg元素对土壤环境质量和农产品质量安全的影响,选取贵州具有代表性的几个农业种植区,对不同地质背景和不同农产品中As、Hg元素在母岩—深层土—浅层土—农产品中的含量变化进行了对比分析。结果表明:农产品中As、Hg元素含量与其土壤元素背景含量虽然存在一定的关系,但其受土壤理化性质及农作物自身种属的影响更大。此外,作为As、Hg元素高背景含量的碳酸盐岩区,在其特殊的地质环境特征下,其农作物中并没有富集过量的As、Hg元素。As、Hg元素的高背景含量反映在农作物上仍然是安全的。

Several crop production areas in Guizhou province were selected to study the effects of arsenic and mercury on soil environmental quality and quality security of agricultural products. A comparative analysis was conducted on mercury and arsenic content changes in parent rock, deep soil, shallow soil and agricultural products under different geological background （carbonate area and non-carbonate area） and in different agricultural products. The results showed that the content of arsenic and mercury in agricultural products relates to the background content of the soil element, but it is more influenced by soil physical and chemical properties and the crop varieties. In addition, there are non excessive enriched arsenic and mercury in the agricultural products at the carbonate area, in which are high background content of arsenic and mercury.