水稻镉积累影响因素与低镉稻米生产策略

镉是一种生物毒性极强且分布广泛的重金属元素。农田中的镉不仅影响作物的生长发育,而且可通过食物链进入人体内,当富集到一定程度会危害人体健康。水稻是我国重要的粮食作物之一,在保障我国粮食安全中的地位举足轻重,但水稻同时也是对镉吸收和积累最强的大宗谷类作物之一。近些年“镉大米”事件在我国频繁发生,稻米镉污染已成为一个备受社会关注的严峻问题,治理稻米镉污染迫在眉睫。本文从低镉水稻品种筛选与培育、优化水分管理、调节土壤pH值、施用叶面阻隔剂等方面对稻米镉污染治理技术的研究进展进行了综述,旨在为技术的集成、推广和应用提供理论依据,同时为新技术的研发提供新的思路。

Factors Affecting Cadmium Accumulation in Rice and Strategies for Minimization

Cadmium (Cd) is an extremely toxic and widely distributed heavy metal. Cd in farmland has adverse impacts on crop growth and development, and threatens human health via the food chain. Rice, as a staple food crop in China, plays an important role in food security. However, rice tends to absorb and accumulate more Cd compared with other cereal crops. The ‘Cd-polluted rice’ events were frequently reported in recent years, which has made Cd pollution a serious public concern. Reducing the Cd accumulation in rice grains is urgent. In this review, we summarize the advances in screening and breeding for rice varieties with low Cd, water management, adjustment of soil pH and foliar dressing strategies. The article aims to lay a theoretical foundation for technological integration, extension and application, and development of new technologies.