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| Effects of foliar application of manganese sulfate and zinc sulfate on bioaccessibility of cadmium, manganese, and zinc in wheat grains |
| Received:July 17, 2020 |
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| KeyWord:wheat;zinc fertilization;manganese fertilization;cadmium;bioaccessibility;foliar application |
| Author Name | Affiliation | E-mail | | TAO Xue-ying | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | XU Ying-ming | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | WANG Lin | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | wanglin2017@caas.cn | | HUANG Qing-qing | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | YAN Xiu-xiu | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIU Chang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | |
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| Abstract: |
| A field trial was conducted to study the effects of foliar fertilization on health risks associated with the consumption of cadmium (Cd)-contaminated wheat grains. MnSO4 and ZnSO4 at different concentrations were applied as foliar fertilizers. The bioaccessibilities of Cd, manganese(Mn), and zinc(Zn)were assessed using the in vitro digestion method, and the bioaccessible established daily intake (BEDI) values of Cd, Mn, and Zn were calculated. The effects of the foliar application of Mn and Zn on the concentrations, bioaccessibilities, and bioaccessible established daily intake(BEDIs)of Cd, Mn, and Zn in wheat grains were evaluated. The results showed that the foliar application of MnSO4 and ZnSO4 significantly reduced the Cd content in wheat grains, with a maximal reduction of 47.45% compared to that in the control. The foliar application of MnSO4 significantly increased the Mn content in wheat grains. Foliar treatment with medium and high concentrations of ZnSO4 significantly increased the Zn content in wheat grains. The bioaccessibilities of Cd, Mn, and Zn in wheat were higher in the gastric phase than in the small intestinal phase. The foliar application of ZnSO4 at high concentrations significantly reduced Cd bioaccessibility and increased Zn bioaccessibility in wheat in the gastric phase. The foliar application of MnSO4 at high concentrations increased the bioaccessibilities of Mn and Zn in wheat grains in the small intestinal phase. The consumption of Cd-contaminated wheat could lead to a high Cd intake. The foliar application of ZnSO4, high concentrations of MnSO4, and medium and high concentrations of MnSO4 plus ZnSO4 significantly reduced the BEDI of Cd from wheat grains, with a maximal reduction of 42.86% compared to that in the control. Foliar treatments with MnSO4 significantly increased the BEDI of Mn from wheat grains. The BEDIs of Zn from wheat grains treated with MnSO4 and ZnSO4 were higher than the recommended nutrient intake and met the human needs for Zn from wheat. The BEDI of Zn was highest from wheat that was treated with high concentrations of MnSO4. In conclusion, the foliar application of MnSO4 at high concentrations can significantly reduce the BEDI and Cd content and markedly increase the Mn content and the bioaccessibilities and BEDIs of Mn and Zn in wheat. Therefore, this treatment is considered most suitable for reducing Cd intake and increasing Mn and Zn intake from wheat. |
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