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| Effects of manganese fertilizer on rhizosphere soil manganese availability and cadmium uptake and transport by wheat |
| Received:December 27, 2021 |
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| KeyWord:wheat;cadmium(Cd);manganese fertilizer;Cd uptake and translocation |
| Author Name | Affiliation | E-mail | | YAO Cheng | School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | | | ZHOU Tianyu | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | | | YI Chao | School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | | | SHI Gaoling | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | | | SHEN Wenzhong | Taicang Agricultural Technology Extension Center, Taicang 215400, China | | | ZHANG Xumei | Taicang Agricultural Technology Extension Center, Taicang 215400, China | | | CHEN Wei | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | | | FAN Guangping | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | fanguangping@jaas.ac.cn | | GAO Yan | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China | ygao@jaas.ac.cn |
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| Abstract: |
| To explore the effect of manganese(Mn)fertilizer on cadmium(Cd)absorption by wheat in heavily polluted soil, pot experiments were conducted to study the effect of different concentrations of manganese fertilizers(13, 26 mg·kg-1, and 66 mg·kg-1)and different types of manganese fertilizers[conventional manganese fertilizer(CMF), slow-release manganese fertilizer(SMF)] on rhizosphere soil Cd and Mn availability and Cd and Mn uptake and transport in wheat. The results showed that the application of Mn fertilizer could significantly increase the content of available soil Mn, and the supply of Mn to soil by SMF in the later stage of wheat growth was significantly higher than that of CMF. Compared with the control, CMF increased the content of available soil Mn by 8%~61% in the early stage of wheat growth; SMF increased the content of available soil Mn 6%~105% in the later stage of wheat growth. The application of CMF significantly increased the Mn content of wheat roots at the elongation stage. In contrast, the application of SMF significantly increased the Mn content of wheat roots at the grain-filling and mature stages of wheat. Mn fertilizer treatment significantly decreased the Cd content in roots at the elongation and booting stages and shoot Cd content at the maturity stage. Among all the treatments, only the application of medium- and high-concentration CMF and medium-concentration SMF significantly reduced the Cd content in wheat grains by 14%, 27%, and 17%, respectively. Correlation analysis showed that Mn content in wheat roots was negatively correlated with Cd content in the shoots and the Cd transfer coefficient from wheat roots to shoots during the entire growth period of wheat. The above results showed that the application of Mn fertilizer could increase the content of available Mn in soil and promote the uptake of Mn in the roots of wheat, thereby inhibiting the uptake of Cd by the roots of wheat and reducing the transport of Cd from wheat roots to shoots. In moderate and severe Cd-contaminated soils, the application of Mn fertilizer alone cannot guarantee the safe production of wheat, and more effective measures or comprehensive agronomic techniques need to be taken at the same time to reduce the accumulation of Cd in wheat grains further. |
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