Pedosphere 7(4): 325--330, 1997
ISSN 1002-0160/CN 32-1315/P
©1997 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Comparative study on characteristics of P fixation by Mn, Fe and Al
LU Qi-Ming1 and LIAO Zhong-Wen2
1 Department of Science, South China Agricultuml University, Guangzhou 510642 (Chica)
2 Scientific Research Office, South China Agricultural University, Guangzhou 510642 (China)
ABSTRACT
      An experiment was conducted to examine the role of Mn in P fixation through comparing with Al and Fe. Hydroxides and oxides of Al, Fe and Mn were prepared in lab under opened and closed conditions to react with phosphate. The newly formed Mn hydroxide showed the strongest P-fixing ability, even several times higher than Fe hydroxide, but became the lowest rapidly due to ageing when exposed to air. Mn oxide showed the lowest P-fixing ability. Therefore, a sound consideration on P fixation should be based on both quantities and P-fixing abilities of the compounds of Fe, Al and Mn. The importance of Mn on P availability should receive more attention especially under oxidation-reduction dynamic conditions.
Key Words:  Al, Fe, Mn, phosphate fixation
Citation: Lu, Q. M. and Liao, Z. W. 1997. Comparative study on characteristics of P fixation by Mn, Fe and Al. Pedosphere. 7(4): 325-330.
View Full Text



Copyright © 2024 Editorial Committee of PEDOSPHERE. All rights reserved.
Address: P. O. Box 821, 71 East Beijing Road, Nanjing 210008, China    E-mail: pedosphere@issas.ac.cn
Technical support: Beijing E-Tiller Co.,Ltd.