利用植物生物技术和农艺措施控制镉在食物链中的迁移

由于人类的工农业活动，Cd成为了自然环境和农业环境中主要散布的重金屑。Cd对各种生物有机体具有潜在的毒性，能引起人类诸多的疾病。由于具有高的移动性和低的中毒浓度，Cd是环境中最危险的重金属之一。而土壤—作物系统是农业生态系统的核心，它是农用化学物质施用及污水灌溉等的主要场所，是Cd向人类食物链迁移积累、直接或间接地危害人体健康的关键环节。利用植物生物技术选育低积累镉的植物基因型、采取相应的农艺措施、控制Cd在食物链中的迁移是农产品安全生产的有效途径。

Controlling Transfer of Cadmium in the Food Chain through Plant Biotechnology and Agronomic Management

Cadmium is principally dispersed in natural and agricultural environments through various industrial and agricultural activities.This trace metal is a pollutant and potential toxin that has no known function in any biological organism,and is one of the most dangerous heavy metals for the environment due to its high mobility and low toxic concentration in organisms.As a core of agricultural ecosystem,soil-plant system loads chemicals and sewage,and is the key of transfer of cadmium to food chain.Therefore,controlling transfer of cadmium in the food chain through plant biotechnology and agronomic management,including reducing cadmium content in phosphoric fertilizer,increasing soil pH,improving crop rotation may be the available approach for agricultural food safety.