重金属在农业生态系统中的迁移、积累特征

Heavy metals are not the essential ingredient for the growth of crops, but the danger to crops are cumulative pollutants. Once the heavy metals have polluted agricultural ecosystems, it is difficult to degrade and removed. Heavy metals pollution of the soil can lead to agricultural produce residual poison, and may enter the food chain through biological intimate, thus further endanger human health .This article provides an overview of agro-ecological systems and the relocation of heavy metals accumulation identity, and take an example of mercury do specify, to remind people about the hazards of heavy metals, to take positive measures early prevention.