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| Effects of foliar inhibitor application on safe production in mild and moderate cadmium polluted wheat fields |
| Received:March 24, 2025 Revised:May 08, 2025 |
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| KeyWord:Cd contaminated soil;foliar inhibitor;spraying period;transport;wheat |
| Author Name | Affiliation | E-mail | | SU Yao | Institute of Environmental Resources & Soil Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310000, China | | | JIA Shengqiang | Institute of Environmental Resources & Soil Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310000, China | | | WANG Yunlong | Institute of Environmental Resources & Soil Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310000, China | | | SHEN Alin | Institute of Environmental Resources & Soil Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310000, China | | | XIE Wei | Tonglu Agricultural Technology Extension Center, Hangzhou 311500, China | 897445794@qq.com |
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| Abstract: |
| To investigate the impact of foliar inhibitors on the safe utilization of cadmium（Cd）contaminated soil and to achieve the safe production of wheat, a field experiment was conducted and 2 types of foliar inhibitors, containing different components such as zinc（0.4 g· L-1）, humic acid（30 g · L-1）and water-soluble silicon（0.1 g · L-1）, and water-soluble silicon（0.1 g · L-1）and potassium（15.0%） respectively, were tested at different growth stages of wheat：initial jointing stage（T1）, heading stage（T2）, grouting stage（T3）, initial jointing stage + heading stage（T4）, heading stage+grouting stage（T5）and initial jointing stage + heading stage + grouting stage（T6）. The control treatment was carried out without foliar inhibitor. The results showed：the average grain yield increase rate of wheat treated with the foliar inhibitor containing zinc, humic acid and water-soluble silicon（3 L·hm-2）was 6.1%-47.2%, and the yield increase rate was in the order of T6>T1>T4>T2>T5>T3 from high to low. Among them, the yield of wheat in treatment of T6 was significantly higher than that in CK, T2, T3 and T5. The average yield of wheat treated with foliar inhibitor containing water-soluble silicon and potassium（3 L·hm-2）was 5.4%-19.9% higher than that in CK, but there was no significant difference among different treatments. Compared with CK, T4, T5 and T6 treatment with foliar inhibitor containing zinc, humic acid and water-soluble silicon could significantly reduce the Cd content in wheat grains to 0.08-0.12 mg · kg-1 by increasing the absorption of soil zinc by wheat, reducing the Cd enrichment coefficient and transport coefficient of wheat grains, and the proportion of cadmium reduction is 83.3%-89.5%. The wheat grain Cd content of T4 and T6 treatments reached the national wheat safety production standard of 0.1 mg·kg-1. The effects of the 2 foliar inhibitors on soil pH value, total Cd and available Cd content were not significant. In conclusion, the application of foliar inhibitor containing zinc, humic acid and water-soluble silicon in the initial jointing, heading and grouting stages of wheat can effectively achieve the safe production of wheat and increase yield and income. |
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