Pedosphere 16(1): 82--90, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Accumulation and fractionation of rare earth elements in a soil-wheat system |
DING Shi-Ming1,2 , LIANG Tao2, ZHANG Chao-Sheng3, WANG Li-Jun1 and SUN Qin4 |
1 Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: smding@niglas.ac.cn
2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China)
3 Department of Geography and Environmental Change Institute, National University of Ireland, Galway (Ireland)
4 State Key Laboratory of Pollution Control and Resource Reuse, School of the Environrraent, Nanjing University, Nanjing 210093 (China) |
| ABSTRACT |
| Time series bioaccumulation of rare earth elements (REEs) in field-grown wheat with and without a dressing of extraneous REE fertilizer at different growth stages and fractionation of REEs during their transport in a soil-wheat system were determined. Time-dependent accumulation of extraneous REEs was found in different parts of wheat. An upward transport of extraneous REEs from roots to shoots under a soil dressing and a downward transport from leaves to roots with a foliar dressing were also observed. Moreover, fractionation of REEs occurred in the soil-wheat system. Compared to the host soil a positive Eu anomaly in the stems and grains as well as heavy REE enrichment in the grains were found. The ability of the different wheat organs to fractionate Eu from the REE series was ranked in the order of stems ≥ grains > leaves > roots. |
| Key Words: accumulation, fractionatlon, rare earth elements, wheat |
| Citation: Ding, S. M., Liang, T., Zhang, C. S., Wang, L. J. and Sun, Q. 2006. Accumulation and fractionation of rare earth elements in a soil-wheat system. Pedosphere. 16(1): 82-90. |
| |
|
View Full Text
|
|
|
|
