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

Q2 Environmental Science
Jing Tian, Zhen-Bo Wang, Jian-Kang Zhou, Hai-Kuan Cheng, Chang Li, Hong-En Liu, Fu-Qing Sui, Peng Zhao
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引用次数: 0

Abstract

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.

[不同金属元素对小麦-水稻轮作条件下镉吸收的影响]。
镉(Cd)在食物链中的积累对人类健康构成严重威胁。为了探索可能的重金属阳离子抑制剂,通过盆栽试验研究了添加Fe、Mn、Zn和Mg对小麦和水稻Cd吸收和积累的影响。土壤Cd人工添加至5 mg·kg-1,陈化1个月。Fe、Mn、Zn作为金属氯化物分别以100 mg·kg-1和300 mg·kg-1的比例加入。主要结果是:②锌显著降低了小麦和水稻的Cd含量,小麦和水稻的Cd含量分别比对照降低了41%和23%,但不影响产量;③在小麦-水稻轮作模式下,水稻的Cd含量显著低于小麦,ω (Cd)降低了0.17 mg·kg-1。低于国家食品安全标准(GB 2762-2022)规定的大米镉限量值(0.2 mg·kg-1)。综上所述,在小麦-水稻轮作系统中施用Zn可显著减轻籽粒中Cd的积累,其中水稻表现出更明显的效果。这些结果对cd污染农田的安全利用和保障粮食安全具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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