品种和土壤对水稻镉吸收的影响及镉生物有效性预测模型研究进展

稻田受重金属镉(Cd)污染后,土壤中的Cd可能被植物吸收通过食物链进入人体,威胁人类健康。而水稻品种和土壤类型对Cd吸收和积累有着深远的影响,因此在进行Cd的农产品安全阈值制定和人体健康风险评价时,需考虑土壤Cd的生物有效性和不同水稻品种对Cd吸收的影响。本文综述了水稻品种和土壤类型对Cd吸收和积累的影响,并重点介绍了目前常用于预测重金属生物有效性的模型,以期为环境风险评价、土壤环境质量标准及农产品安全阈值制定提供有效的工具,并为生产安全(无公害)稻米提供参考。

Reviews on the effects of rice cultivars and soil types on Cd absorption and prediction model for Cd bioavailability

Cadmium in paddy soils may be absorbed by the plant once the soils was polluted by cadmium, which can also enter the human body through the food chain and thus threat to human health. Rice cultivars and soil types have significant influences on cadmium absorption and accumulation. Therefore, the effect of cadmium bioavailability and different rice cultivars on cadmium absorption need to be considered during establishing the safety threshold of agricultural products and assessing human health risk. This paper reviewed the influence of rice cultivars and soil types on cadmium absorption and accumulation, and described the prediction model which often used for bioavailability of heavy metal currently. We wish it could provide effective tools for the environmental risk assessment, the establishment of soil environment quality standards and agricultural product safety threshold, and also could provide the reference for the production of safety green rice.