Pedosphere 3(3): 277--283, 1993
ISSN 1002-0160/CN 32-1315/P
©1993 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Transformation of Applied Phosphorus in a Calcareous Fluvisol |
| TU SHU-XIN, GUO ZHI-FEN, CHEN SHAO-SHAN |
| Institute of Application of Atomic Energy in Agriculture, Hubei Academy of Agricultural Sciences, Wuhan 430064 |
| ABSTRACT |
| A new inorganic phosphorus (IP) fractionation scheme developed by Jiang and Gu was used in an incubation experiment to investigate the transformation of applied P in a calcareous fluvisol. The results show that after addition of common superphosphate (CSP), the Ca2-P in the soil decreased gradually and transformed largely to the less available Fe-P, Al-P and Ca8-P, rather than to the unavailable forms of Ca10-P and O-P. The different IP fractions ranked in the following order with respect to the increment by addition of CSP after 120 days of incubation: Fe-P> Al-P>Ca8-P>Ca2-P. After addition of pig manure, the content of Ca2-P in the soil increased rapidly at first and then decreased slowly, and the amount of different IP fractions accumulated after 120 days of incubation ranked in the following order: Ca2-P > Fe-P > Ca8-P > Al-P. |
| Key Words: |
| Citation: Tu, S. X., Guo, Z. F. and Chen, S. S. 1993. Transformation of Applied Phosphorus in a Calcareous Fluvisol. Pedosphere. 3(3): 277-283. |
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