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| Effects of two flooding methods on bio-available Cd-Pb-Zn contents of contaminated paddy soil and bacteria community in rice rhizosphere |
| Received:June 01, 2018 |
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| KeyWord:continuous flooding;intermittent flooding;complex contaminated,growth stage,rhizosphere,bacteria community |
| Author Name | Affiliation | E-mail | | LI Hai-long | College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | LI Xiang-zhen | College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China | | | NIE San-an | College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | LI Yun-yun | College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | ZHENG Chao-yuan | College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | WANG Guo | College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | 1400619353@qq.com |
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| Abstract: |
| In this study, to identified the respond of bacteria community in rice rhizosphere under two water regimes on the Cd-Pb-Zn contaminated paddy soil. Investigating bacteria community component and diversity in rice rhizosphere under continuous flooding(CF) and intermittent flooding(IF) designed, by high-through sequences technology, at tillering and ripening stage of rice, respectively. From results of this study, flooding regimes could significant impact on bio-available N, P, Cd, Pb, Zn, Ni contents in soil. At rice tillering stage, bio-available Cd, Pb, Zn, Ni contents in CF treatment were significant higher than IF treatment, while bio-available Cd, Pb, Zn contents in CF treatment were significant lower than IF treatment. In addition, bio-available N content in CF plots was significant higher than IF plots at tillering stage, but bio-available P content in IF plots was significant higher than CF plots at two growth stages. In addition, the effects of flooding regime on α diversity primary performed at rice tillering stage, which due to reaction of flooding conditions and soil chemical characters. Furthermore, through investigated the change of bacteria abundance and structure, we observed that flooding regime could impact on bacteria structure significantly at two growth stages. At tillering stage, relative abundance of Enterobacteriaceae and Moraxellaceae under CF plots are higher than IF plots, which shown strongly correlation with bio-available Zn, Ni, Pb contents, while abundance of Planococcaceae under IF plots were higher than CF plots, which may due to bioavailable phosphorus contents. When the rice repining stage, abundance of Geobacteraceae and Myxococcaceae under CF plots were higher than IF plots, and Geobacteraceae community shown negative correlation with bioavailable phosphorus contents in soil. In present study, we use molecular biology Techniques to understand the linkage reaction of bacteria community and available ions contents in paddy soil by different flooding regime, and find soil ions contents, affecting by flooding management, would be key factor to impact on bacteria community change. |
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