| Chemical behavior of Cd in rice rhizosphere | |
| Lin, Q; Chen, YX; Chen, HM; Yu, YL; Luo, YM; Wong, MH | |
| 刊名 | CHEMOSPHERE
 |
| 2003-02-01 | |
| 卷号 | 50期号:6页码:755-761 |
| 关键词 | rice rhizosphere Cd Pb |
| ISSN号 | 0045-6535 |
| 通讯作者 | Lin, Q() |
| 英文摘要 | Chemical behavior of Cd in rice rhizosphere as affected or not by Pb was investigated. The NH4OAc extractable Cd in the rhizosphere was distinctly lower than that in bulk soil. The depletion of Cd in the rhizosphere could not be simply attributed to Cd uptake by rice. The observed phenomena could be attributed to the decreasing pH in the rhizosphere and the complexing capabilities of soluble exudates for Cd. Extractable Cd increased in both the rhizosphere and bulk soil after the addition of Pb, which might be caused by the replacement of Ph for Cd. The extractable Cd in the nonrhizosphere varied with the distance from the root surface, especially within 0-1 mm, which was greatly affected by the combined effects of mass flow, activation and fixation, and had the lowest extractable Cd. Ph addition affected the distribution of extractable Cd in the non-rhizosphere, implying that the affinity of Pb for organic matter was greater than that of Cd. The difference of Cd species between rhizosphere and bulk soil demonstrated that the transformation of exchangeable Cd (EXC-Cd) to OM-Cd (bound to organic matter) and FMO-Cd (bound to iron and manganese oxide) occurred in the rice rhizosphere due to the exudations from the rice root, the activity of microorganisms on the root surface and the activation of Fe and Mn oxides. The interaction between Pb and Cd resulted in the content of EXC-Cd being higher in the presence of Pb, whereas the OM-Cd content was lower in the presence of Pb. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | LOW-MOLECULAR-WEIGHT ; MAYS-L ROOTS ; SOIL SOLUTIONS ; ORGANIC-ACIDS ; METAL-BINDING ; TRACE-METALS ; CADMIUM ; ZINC ; SPECIATION ; AVAILABILITY |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000180082200013 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2559271 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Lin, Q |
| 作者单位 | 1.Zhejiang Univ, Dept Environm Sci, Hangzhou 310029, Peoples R China 2.Acad Sinica, Inst Soil Sci, Nanjing 210008, Peoples R China 3.Hong Kong Baptist Univ, Dept Biol, Inst Nat Resources & Waste Management, Kowloon, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Q,Chen, YX,Chen, HM,et al. Chemical behavior of Cd in rice rhizosphere[J]. CHEMOSPHERE,2003,50(6):755-761. |
| APA | Lin, Q,Chen, YX,Chen, HM,Yu, YL,Luo, YM,&Wong, MH.(2003).Chemical behavior of Cd in rice rhizosphere.CHEMOSPHERE,50(6),755-761. |
| MLA | Lin, Q,et al."Chemical behavior of Cd in rice rhizosphere".CHEMOSPHERE 50.6(2003):755-761. |
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