外源物质对农作物镉毒害的缓解效应

摘要

镉在土壤中有稳定、积累和不易消除的特点,可通过食物链富集进入人体并危害人类健康,而食物摄入是人体积累镉的主要来源.施用外源物质是控制土壤重金属污染的有效手段.本文综述了土壤镉污染对农作物生长的影响和施用各类型外源物质缓解农作物镉胁迫的机理等方面的研究,并提出了农作物对土壤镉吸收的缓解措施.%Cadmium is stable, accumulative and hard to be removed in soil It could accumulate in human bodies and do harm to people's health through food chain, which is the main cadmium source of human body. Applying exogenous substances is an effective way to mitigate soil heavy -metal pollution. In this paper,the influence of soil cadmium pollution on crop growth was summarized as well as the alleviation mechanisms of applying different kinds of exogenous substances on crop cadmium absorption. Then some alleviating measures were put forward.