{"title":"[Effects of Different Metal Elements on Cadmium Uptake Under Wheat-rice Rotation Condition].","authors":"Jing Tian, Zhen-Bo Wang, Jian-Kang Zhou, Hai-Kuan Cheng, Chang Li, Hong-En Liu, Fu-Qing Sui, Peng Zhao","doi":"10.13227/j.hjkx.202403038","DOIUrl":null,"url":null,"abstract":"<p><p>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<sup>-1</sup> and aged for one month. Fe, Mn, and Zn were added as metal chlorides at a ratio of 100 mg·kg<sup>-1</sup> and Mg for 300 mg·kg<sup>-1</sup>. 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<sup>-1</sup> for <i>ω</i> (Cd), which was below the rice Cd limit value (0.2 mg·kg<sup>-1</sup>) 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.</p>","PeriodicalId":35937,"journal":{"name":"环境科学","volume":"46 3","pages":"1806-1814"},"PeriodicalIF":0.0000,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"环境科学","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.13227/j.hjkx.202403038","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Environmental Science","Score":null,"Total":0}
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.