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| Effects of different iron fertilizers and application times on cadmium absorption in rice |
| Received:November 30, 2018 |
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| KeyWord:foliar spraying;iron fertilizer;rice cadmium;competition;control |
| Author Name | Affiliation | E-mail | | SHANGGUAN Yu-xian | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | | | CHEN Kun | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | | | YU Hua | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | | | QIN Yu-sheng | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | shengyuq@126.com | | ZENG Xiang-zhong | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | | | ZHOU Zi-jun | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | | | GUO Song | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Monitoring & Experimental Station of Plant Nutrition and Agro-Environment for Sloping Land in South Region, Ministry of Agriculture, Chengdu 610066, China | | | ZHANG Lan | Chengdu Soil and Fertilizer Testing Center, Sichuan Provincial Department of Agricultural and Rural Affairs, Chengdu 610041, China | |
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| Abstract: |
| In researching Cd pollution control in rice fields of Sichuan Province, we used Fe fertilizers during the rice growing period. The results showed that the yields of four rice varieties were increased by ferrous sulfate and ethylenediamine-N,N'-bis(2-hydroxy-phenyl) acetic acid-Fe(EDDHA-Fe)application. Application of Fe fertilizer increased rice yield by 6.67% in Y Liangyou(P<0.05), while EDDHA-Fe increased rice yield by 13.33%~14.32% in Dejing 1(P<0.05). Among the different Fe fertilizer applications, foliar EDDHA-Fe application showed the most significant Cd reduction. The application of Fe fertilizer had significant influence on rice Cd content. EDDHAFe spraying treatment significantly reduced Cd content, with the average rice Cd content decreasing by 20.87%(P>0.05). Iron content was negatively correlated with Cd content in the four rice varieties tested. The Fe content increased most in the flowering stage, and the ratio of rice/straw Fe content was far higher than the ratio of rice/straw Cd content, which showed that the Fe transfer rate from plant to rice was much higher than that of Cd. The Fe and Cd rice content showed a quadratic function relationship(P<0.05). At lower concentration levels, the content of Cd in rice grains increased with the Fe content, and then decreased as the increased Fe content reached a certain level. In summary, it has been found that the Cd level in rice grains was affected by the amount of shoot Cd, and by the method and type of Fe fertilizer application, and that, in soil that was slightly Cd polluted, the Cd content of rice could be reduced by controlled use of Fe fertilizer. |
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