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| Effect of foliar spraying zinc on the accumulation of zinc and cadmium in rice |
| Received:May 30, 2018 |
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| KeyWord:zinc;cadmium;rice;translocation factors;foliar application |
| Author Name | Affiliation | E-mail | | LÜ Guang-hui | College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China
Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | XU Chao | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | xuchao1388@126.com | | WANG Hui | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | SHUAI Hong | College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China | 6331353@qq.com | | WANG Shuai | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | LI Bai-zhong | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | ZHU Qi-hong | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | ZHU Han-hua | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | HUANG Daoyou | Key Laboratory of Subtropical Agro-ecological Processes, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | |
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| Abstract: |
| In this study, a field plot experiment was conducted to study the effects of different concentrations of zinc(1~5 g·L-1 ZnSO4) on yield, cadmium-zinc concentration and cadmium transport of rice(Zhuliangyou 189) at early grain filling stage of rice. The results showed that foliar spraying 1~5 g·L-1 ZnSO4 had no significant effect on rice yield(P>0.05). The concentrations of Cd decreased and the Zn concentrations increased in the various organs of rice plants sprayed with 1~5 g·L-1 ZnSO4. The concentrations of Cd in brown rice were decreased by 9.0%~47.8%, and the concentrations of Zn increased by 31.7%~55.6% with foliar application 1~5 g·L-1 ZnSO4. After foliar application with 1~5 g · L-1 ZnSO4, translocation factors(TFs) of Cd from roots to the first nodes(TFs(First nodes/Roots)), from flag leaves to the first node(TFs(First nodes/Falg leaves)), and from rachises to brown rice(TFs(Brown rice/Rachises)) was decreased by 5.8% to 43.7%, 1.0% to 30.3%, and 4.7% to 26.7%, respectively. There was a significant positive correlation between Cd concentration in brown rice and TFs(First nodes/Roots), TFs(Brown rice/Rachises), and root Cd concentrations(P<0.01). These results indicate that foliar applied Zn reduced Cd concentrations in brown rice by inhibiting the uptake of Cd by root and translocation of Cd from root and flag leaves to the first nodes, and from rachises to brown rice. Foliar spraying 3~5 g·L-1 ZnSO4 significantly reduced the Cd concentrations of brown rice, which was the appropriate amount of foliar application of Zn to reduce Cd concentration in brown rice. |
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