Microbe mediated arsenic release from iron minerals and arsenic methylation in rhizosphere controls arsenic fate in soil-rice system after straw incorporation
文献类型：期刊论文
| 作者 | Zhao, Fang-Jie; Yang, Yu-Ping ; Zhang, Hong-Mei; Yuan, Hai-Yan; Duan, Gui-Lan; Jin, De-Cai; Zhu, Yong-Guan
|
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 236页码:598-608 |
| 关键词 | Straw incorporation Straw biochar Rice (Oryza sativa L.) Arsenic mobility Arsenic methylation |
| ISSN号 | 0269-7491 |
| 文献子类 | Article |
| 英文摘要 | Arsenic (As) contamination is a global problem. Straw incorporation is widely performed in As contaminated paddy fields. To understand how straw and straw biochar incorporation affect As transformation and translocation in the soil-microbe-rice system, a pot experiment was carried out with different dosages of rice straw and straw biochar application. Results showed that both straw biochar and straw application significantly increased As mobility. Straw biochar mobilized As mainly through increasing soil pH and DOM content. Straw incorporation mainly through enhancing As release from iron (Fe) minerals and arsenate (As(V)) reduction to arsenite (As(III)). Straw biochar didn't significantly affect As methylation, while straw incorporation significantly enhanced As methylation, elevated dimethylarsenate (DMA) concentration in soil porewater and increased As volatilization. Straw biochar didn't significantly change total As accumulation in rice grains, but decreased As(III) accumulation by silicon (Si) inhibition. Straw incorporation significantly increased DMA, but decreased As(III) concentration in rice grains. After biochar application, dissolved As was significantly positively correlated with the abundance of Bacillus, indicating that Bacillus might be involved in As release, and As(III) concentration in polished grains was negatively correlated with Si concentration. The significant positive correlation between dissolved As with Fe and the abundance of iron-reducing bacteria suggested the coupling of As and Fe reduction mediated by iron-reducing bacteria. The significant positive correlation between DMA in rice grains and the abundance of methanogenic bacteria indicated that methanogenic bacteria could be involved in As methylation after straw application. The results of this study would advance the understanding how rice straw incorporation affects As fate in soil-microbe-rice system, and provide some guidance to straw incorporation in As contaminated paddy soil. This study also revealed a wealth of microorganisms in the soil environment that dominate As mobility and transformation after straw incorporation. (C) 2018 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40609]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhao, Fang-Jie,Yang, Yu-Ping,Zhang, Hong-Mei,et al. Microbe mediated arsenic release from iron minerals and arsenic methylation in rhizosphere controls arsenic fate in soil-rice system after straw incorporation[J]. ENVIRONMENTAL POLLUTION,2018,236:598-608. |
| APA | Zhao, Fang-Jie.,Yang, Yu-Ping.,Zhang, Hong-Mei.,Yuan, Hai-Yan.,Duan, Gui-Lan.,...&Zhu, Yong-Guan.(2018).Microbe mediated arsenic release from iron minerals and arsenic methylation in rhizosphere controls arsenic fate in soil-rice system after straw incorporation.ENVIRONMENTAL POLLUTION,236,598-608. |
| MLA | Zhao, Fang-Jie,et al."Microbe mediated arsenic release from iron minerals and arsenic methylation in rhizosphere controls arsenic fate in soil-rice system after straw incorporation".ENVIRONMENTAL POLLUTION 236(2018):598-608. |
入库方式： OAI收割
来源：生态环境研究中心
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