重金属在农业生态系统中的迁移、积累特征
首发时间:2006-05-25
摘要:重金属不是作物生长的必需元素,而是一种对作物有积累性危害的污染物质。重金属一旦污染农业生态系统,很难降解、去除。重金属对土壤污染后,可导致农产品产生残毒,并可通过食物链进入生物体内,从而进一步危害人体健康。本文就农业生态系统中重金属的迁移与积累特性进行综述,并以汞为例做具体阐述,旨在提醒人们关注重金属的危害,采取积极措施提早预防 。
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Heavy metals in the agricultural ecosystems migration and accumulation features
Abstract: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.
Keywords: Heavy metals agricultural ecosystems migration accumulation
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No.6791551441148527****
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