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| Effects of molybdenum application on cadmium uptake and transport by winter wheat in cadmium contaminated soil |
| Received:February 21, 2025 Revised:May 16, 2025 |
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| KeyWord:cadmium;winter wheat;molybdenum;cadmium forms;soil enzyme activity |
| Author Name | Affiliation | E-mail | | WU Mengmeng | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China | | | NIE Zhaojun | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China
Key Laboratory of Soil Pollution Prevention, Control and Remediation in Henan Province, Zhengzhou 450046, China
Key Laboratory of Farmland Quality Conservation in Huang-Huai-Hai Plain, Ministry of Agriculture and Rural Affairs, P. R. China, Zhengzhou 450046, China | | | XU Jiayang | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China
Key Laboratory of Soil Pollution Prevention, Control and Remediation in Henan Province, Zhengzhou 450046, China | jiayangxu@henau.edu.cn | | LIU Haiyang | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China
Key Laboratory of Soil Pollution Prevention, Control and Remediation in Henan Province, Zhengzhou 450046, China | | | ZHANG Yupeng | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China
Key Laboratory of Soil Pollution Prevention, Control and Remediation in Henan Province, Zhengzhou 450046, China | | | ZHAO Peng | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China
Key Laboratory of Soil Pollution Prevention, Control and Remediation in Henan Province, Zhengzhou 450046, China
Key Laboratory of Farmland Quality Conservation in Huang-Huai-Hai Plain, Ministry of Agriculture and Rural Affairs, P. R. China, Zhengzhou 450046, China | | | LIU Hong'en | Resources and Environment College of Henan Agricultural University, Zhengzhou 450046, China
Key Laboratory of Soil Pollution Prevention, Control and Remediation in Henan Province, Zhengzhou 450046, China
Key Laboratory of Farmland Quality Conservation in Huang-Huai-Hai Plain, Ministry of Agriculture and Rural Affairs, P. R. China, Zhengzhou 450046, China | liuhongen7178@126.com |
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| Abstract: |
| To investigate the effects of different molybdenum（Mo）applications on cadmium（Cd）uptake and transport in wheat in Cd contaminated soil. This study conducted a pot experiment using Bainong 307 as the experimental material, and set up five treatments （Cd0Mo0, Cd10Mo0, Cd10Mo0.15, Cd10Mo0.30 and Cd10Mo0.45）to investigate the effects of different Mo application rates on wheat yield, Cd content, Mo content, soil available Cd, available Mo, different Cd forms, and soil enzyme activity in Cd polluted soil. The results showed that soil Cd pollution reduced wheat yield by 19.86%, and different Mo application treatments increased soil effective Mo content and Mo content in wheat roots, stems and leaves, glumes and grains; different Mo application treatments increased wheat yield by 19.86% to 48.53%. Soil Cd pollution increased the Cd content in the effective state of the soil as well as the Cd content in the roots, stems and leaves, glumes and grains of wheat. Compared with the Cd10Mo0 treatment, different Mo treatments were able to reduce the content of Cd in the effective state of the soil, and among them, the Cd10Mo0.30 treatment was the most effective, which reduced the content of Cd in the effective state of the soil by 10.39%. In terms of soil Cd form, different Mo application rates promoted the conversion of soil exchangeable Cd into carbonate-bound Cd to a certain extent. Cd10Mo0.30 treatment had the best effect in reducing the Cd content in wheat grain, which was 22.05% lower than that of Cd10Mo0 treatment. Cd10Mo0.45 treatment had the best effect in inhibiting Cd transport from glume to grain, which was 22.26% lower than that of Cd10Mo0 treatment, and the enrichment factor of Cd in wheat grain was the best effect in reducing Cd enrichment coefficient in wheat grain, which was 22.97% lower than that of Cd10Mo0 treatment. In addition, the application of Mo can also enhance the activities of soil catalase, alkaline phosphatase, sucrase and urease, and the Cd10Mo0.30 treatment had the best effect of increasing the activities, which increased by 11.15%, 17.00%, 13.48%, and 27.70% compared with that of the Cd10Mo0 treatment, respectively. In summary, Mo application reduces the Cd content in wheat grains by changing the soil Cd morphology, reducing the Cd content in the effective state of the soil, increasing the soil enzyme activity, and reducing the uptake and transport of Cd in wheat grains. |
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