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| Effects of silicon fertilizer application on the cadmium and silicon content of rice at different growth stages |
| Received:March 07, 2017 |
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| KeyWord:rice(Oryza sativa L.);cadmium;silicon |
| Author Name | Affiliation | E-mail | | PENG Hua | Institute of Agriculture and Biological Resources Utilization, Hunan Academy of Agricultural Sciences, Changsha 410125, China
Central South University, Changsha 410000, China
Ministry of Agriculture Key Laboratory of Agriculture Environment in Middle Reach Plain of Yangtze River, Changsha 410125, China | | | TIAN Fa-xiang | Institute of Agriculture and Biological Resources Utilization, Hunan Academy of Agricultural Sciences, Changsha 410125, China
Ministry of Agriculture Key Laboratory of Agriculture Environment in Middle Reach Plain of Yangtze River, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | WEI Wei | Hunan University, Changsha 410000, China | | | ZHOU Yu-jian | Hunan University, Changsha 410000, China | | | GUAN Di | Institute of Agriculture and Biological Resources Utilization, Hunan Academy of Agricultural Sciences, Changsha 410125, China
Ministry of Agriculture Key Laboratory of Agriculture Environment in Middle Reach Plain of Yangtze River, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | LIU Sai-hua | Institute of Agriculture and Biological Resources Utilization, Hunan Academy of Agricultural Sciences, Changsha 410125, China
Ministry of Agriculture Key Laboratory of Agriculture Environment in Middle Reach Plain of Yangtze River, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | JI Xiong-hui | Institute of Agriculture and Biological Resources Utilization, Hunan Academy of Agricultural Sciences, Changsha 410125, China
Ministry of Agriculture Key Laboratory of Agriculture Environment in Middle Reach Plain of Yangtze River, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | jixionghui@sohu.com |
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| Abstract: |
| This aim of this research was to study the reduction mechanism of cadmium and improve the silicon fertilizer application process to inhibit cadmium(Cd) accumulation in rice, according to field trials. The results showed that silicon increased the pH of soil(0.160~0.290) and reduced the availability of cadmium. In contrast, basal application enhanced crop yield by 9.7%(P<0.05); and cadmium levels in rice stem, leaf, husk, and grain were significantly lowered, by 31.9%,65.8%,46.1%, and 25.3%, respectively(P<0.05). Meanwhile, silicon effectively inhibited cadmium transport from the stem to the leaf and husk, which reduced the Cd accumulation in grain. In addition, silicon fertilizer significantly increased the silica content in the stem, leaf, and husk to 44.1%, 71.5% and 28.8%, respectively(P<0.05). Our study suggested that basal silicon fertilizer could reduce the availability of Cd, prevent Cd migration and accumulation, and increase rice production simultaneously. Basal dressing is recommended as a method of silicon fertilizer application in Cd-polluted paddy fields. |
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