Phosphorus status of some paddy soils in Bangladesh

Phosphorus status of Bangladesh paddy soils covering the major paddy soil types was assessed in terms of parent materials and physiography Total P concentration ranged from 172 to 604 mg kg**-1 in the topsoil and from 126 to 688 mg kg**-1 in the subsoil, and varied with the physiography to which the...

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Bibliographic Details
Published in:Soil science and plant nutrition (Tokyo) 2003-10, Vol.49 (5), p.751-755
Main Authors: Egashira, K. (Kyushu Univ., Fukuoka (Japan). Faculty of Agriculture), Takenaka, J, Shuto, S, Moslehuddin, Md. A.Z
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
BANGLADESH
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
IRRIGATED RICE
PADDY SOIL
PHOSPHORUS
phosphorus status
physiography
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Summary:Phosphorus status of Bangladesh paddy soils covering the major paddy soil types was assessed in terms of parent materials and physiography Total P concentration ranged from 172 to 604 mg kg**-1 in the topsoil and from 126 to 688 mg kg**-1 in the subsoil, and varied with the physiography to which the soils belonged. In most soils, the available P conceutration was much higher for the topsoil than for the subsoil. The inorganic P concentration was higher than the organic P concentration, except for one soil series from the Old Himalayan Piedmont Plain, and was significantly and positively correlated with the total P concentration. Among the inorganic forms, only the concentration of Al-bound P showed a significant correlation with that of available P based on the Bray P-2 method in both topsoil and subsoil. In general, the P status was critically low in paddy soils of the terrace area. Normal growth of paddy rice in this area is expected to be difficult without application of P fertilizer.
ISSN:0038-0768
1747-0765
DOI:10.1080/00380768.2003.10410335