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| A novel plant-derived foliar inhibitor JS-01 decreases Cd content in rice |
| Received:August 18, 2024 |
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| KeyWord:foliar inhibitor;thymol;Cd accumulation;rice;grains |
| Author Name | Affiliation | E-mail | | FU Jie | College of Resource and Environment, Anhui Science and Technology University, Fengyang 233100, China | | | CHEN Hao | Nanjing F-zone Biotech Company, Ltd., Nanjing 210014, China | | | GUAN Yidong | College of Resource and Environment, Anhui Science and Technology University, Fengyang 233100, China | | | YAN Yousheng | Bureau of Agriculture and Rural Affairs of Lianhua County, Pingxiang 337100, China | | | ZHOU Xinxiang | Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | | | LU Chuan | Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | | | YU Xiangyang | Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | | | SHI Zhiqi | Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | | | CHEN Jian | College of Food Engineering, Anhui Science and Technology University, Fengyang 233100, China | chenjian@jaas.ac.cn |
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| Abstract: |
| To explore the regulatory effects of a novel plant-derived foliar retardant（JS-01）on the accumulation of cadmium（Cd）in rice grains, this experiment was conducted in perennial areas of rice with excessive Cd levels, such as Zhejiang, Hunan, and Jiangxi, using small plot experiments, large field experiments, and field demonstrations to measure the Cd content in various organs of rice. The results indicate that in small plot experiments（30 m2 per treatment）, compared with the control（sprayed with water）, the Cd content in the roots, stems, and leaves of rice was reduced by 43.96% to 77.68%, 38.20% to 75.64%, and 33.74% to 56.68%, respectively, and the Cd content in brown rice was reduced by 24.72% to 89.95%. In large field experiments conducted across six different regions with various rice varieties （1.33 hm2 per treatment）, after spraying JS-01, the reduction rates of Cd in brown rice for early, middle, and late rice were 42.86% and 72.41%, 63.89% and 69.44%, and 32.37% and 50.30%, respectively. In large-scale field demonstrations（6.67 hm2 per treatment）, where JS-01 was combined with conventional pesticides and treated uniformly by drone, the Cd content in brown rice also met the national standards（GB 2762—2022）and was superior to the treatment with silicon-based foliar retardants alone. The study shows that the Cd content in brown rice met the national standard requirements, and the treatment with JS-01 significantly reduced the transfer of Cd from root to shoot, and resulted in the compartmentalization of shoot Cd in vegetative organs. The treatment with JS-01 did not affect the yield and agronomic traits of rice and saved a total of 31.2% in labor and pesticide costs compared to the use of silicon-based foliar retardants. Therefore, spraying JS-01 can effectively reduce the accumulation of Cd in brown rice, with better results than silicon-based foliar retardants, and is convenient to use and cost-effective, offering a promising prospect for promotion and application. |
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