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| Effects of Potassium-silicon Fertilizer Application on Lead and Cadmium Uptake by Rice |
| Received:June 09, 2015 |
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| KeyWord:potassium-silicon fertilizer;lead;cadmium;rice |
| Author Name | Affiliation | E-mail | | JIA Qian | College of Resource and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China | | | HU Min | College of Resource and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China | | | ZHANG Yang-yang | College of Resource and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China | | | MENG Yuan-duo | National Agricultural Technical Extension and Service Center, Beijing 100125, China | | | LI Xiao-kun | College of Resource and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China | | | CONG Ri-huan | College of Resource and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China | | | REN Tao | College of Resource and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China | rentao@mail.hzau.edu.cn |
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| Abstract: |
| Potassium-silicon fertilizer contains potassium and other elements(silicon, calcium and managesium) and may be used as a potential metal-immobilizer. Here a pot experiment was conducted to study the effects of potassium-silicon fertilizer applications on growth and potassium(K), lead(Pb) and cadmium(Cd) uptake of rice, and soil Pb and Cd availability. Applying potassium-silicon fertilizer increased plant biomass and K accumulation by 40.4%~47.0% and 170.0%~252.0%, respectively, compared with no K fertilization. However, Pb and Cd content in stems, leaves and grains of rice was decreased significantly by adding potassium-silicon fertilizer. Compared with treatments with K2SO4, applying potassium-silicon fertilizer decreased Pb and Cd content in stems, leaves and grains of rice by 23.6%, 35.6%, and 28.7%, and 15.6%, 29.7%, and 26.8%, respectively. Increasing K fertilizer rates significantly decreased Pb and Cd content in aboveground part of rice. However, there were no significant differences in Pb and Cd content in roots among different treatments. Soil available Pb and Cd content decreased at rice harvest, but they did not show differences between K2SO4 and potassium-silicon fertilizer treatments. The present results show that applying potassium-silicon fertilizer meets rice needs for K while inhibiting the uptake of heavy metals by rice aboveground parts. |
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