麦稻轮作体系施加不同金属元素对镉的吸收效果  

Effects of Different Metal Elements on Cadmium Uptake Under Wheat-rice Rotation Condition

作　　者：田静 王振搏 周健康 程海宽 李畅 刘红恩 睢福庆 赵鹏 TIAN Jing;WANG Zhen-bo;ZHOU Jian-kang;CHENG Hai-kuan;LI Chang;LIU Hong-en;SUI Fu-qing;ZHAO Peng(Key Laboratory of Soil Pollution Control and Remediation of Henan Province,College of Resource and Environment,Henan Agricultural University,Zhengzhou 450002,China;Prevention and Control Center for the Geological Disaster of Henan Geological Bureau,Zhengzhou 450011,China)

机构地区：[1]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 [2]河南省地质局地质灾害防治中心,郑州450011

出　　处：《环境科学》2025年第3期1806-1814,共9页Environmental Science

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.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:①Zn supplementation significantly enhanced the grain biomass of wheat and rice;②Zn 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;and③In 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)forω(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.

关 键 词：镉(CD) 麦稻轮作 金属离子 吸收积累 迁移系数 

分 类 号：X171.5[环境科学与工程—环境科学]