麦稻轮作体系施加不同金属元素对镉的吸收效果 |
摘要点击 884 全文点击 114 投稿时间:2024-03-05 修订日期:2024-05-11 |
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中文关键词 镉(Cd) 麦稻轮作 金属离子 吸收积累 迁移系数 |
英文关键词 Cd wheat-rice rotation metal ion uptake and accumulation transfer factor |
作者 | 单位 | E-mail | 田静 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | 1666873462@qq.com | 王振搏 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | | 周健康 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | | 程海宽 | 河南省地质局地质灾害防治中心, 郑州 450011 | | 李畅 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | | 刘红恩 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | | 睢福庆 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | fuqing.sui@henau.edu.cn | 赵鹏 | 河南农业大学资源与环境学院, 河南省土壤污染防控与修复重点实验室, 郑州 450002 | zhpddy@163.com |
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中文摘要 |
镉(Cd)在小麦和水稻等粮食作物中的积累会对人类健康构成严重威胁. 为探究合适的重金属阻控剂,通过盆栽试验研究了Fe、Mn、Zn和Mg金属元素添加对小麦和水稻Cd吸收积累的影响. 结果表明:①Zn添加显著提高了小麦和水稻籽粒生物量;②土壤添加Zn显著降低了小麦和水稻籽粒Cd含量,小麦和水稻籽粒Cd含量与对照相比分别显著降低了41%和23%,且产量不受影响;③麦稻轮作体系下水稻籽粒Cd含量显著低于小麦,其中水稻ω(Cd)降低至0.17 mg·kg-1,低于《食品安全国家标准 食品中污染物限量》(GB 2762-2022)中规定的水稻Cd限量值(0.2 mg·kg-1). 以上结果说明在麦稻轮作体系中施用Zn可显著降低作物籽粒Cd积累,且在水稻中效果较好,对污染农田的安全利用和粮食安全生产具有重要指导意义. |
英文摘要 |
The accumulation of cadmium (Cd) in the food chain poses a serious threat to human health. To explore the possible heavy metal cation inhibitor, a pot experiment was developed to research the addition of Fe, Mn, Zn, and Mg on Cd uptake and accumulation in wheat and rice. Soil Cd content was artificially added to 5 mg·kg-1 and aged for one month. Fe, Mn, and Zn were added as metal chlorides at a ratio of 100 mg·kg-1 and Mg for 300 mg·kg-1. The main results were: ① Zn supplementation significantly enhanced the grain biomass of wheat and rice; ② Zn remarkably reduced the grain Cd content in wheat and rice, with a decrease of 41% and 23% in wheat and rice grain Cd content compared with that in the control, respectively, without yield penalty; and ③ In the wheat-rice rotation mode, the grain Cd content in rice was notably lower than that in wheat, with a reduction to 0.17 mg·kg-1 for ω (Cd), which was below the rice Cd limit value (0.2 mg·kg-1) specified by the national food safety standard (GB 2762-2022). Collectively, these findings suggest that the application of Zn in a wheat-rice rotation system significantly mitigate Cd accumulation in grains, with rice exhibiting a more pronounced effect. These results hold notable implications for the safe utilization of Cd-contaminated farmland and ensuring food security. |
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