Citation
Lau C. H., . Influence of humic substances on P-sorption in some Malaysian soils under rubber. pp. 186-194. ISSN 0127-7065
Abstract
Humic and fulvic acids of five soils under rubber were separated and purified. The humic substances were found to have a wide range of elemental composition. Treatment of humic acid with Al or Fe resulted in higher absorption of P by the acid. However at higher levels of Al or Fe the level of P associated with humic acid was somewhat lower suggesting that P in the humic acid could be held by physical adsorption forces of the organo-metallic complexes. Sodium humate had a greater tendency to extract more P A1 and Fe from the soil than sodium fulvate. Treatment of oxidised soils with humic substances led to lower P-fixation by the soil. The data showed that humic substances played an important role in decreasing the phosphate-fixing capacity of the highly weathered Malaysian soils.
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Abstract
Humic and fulvic acids of five soils under rubber were separated and purified. The humic substances were found to have a wide range of elemental composition. Treatment of humic acid with Al or Fe resulted in higher absorption of P by the acid. However at higher levels of Al or Fe the level of P associated with humic acid was somewhat lower suggesting that P in the humic acid could be held by physical adsorption forces of the organo-metallic complexes. Sodium humate had a greater tendency to extract more P A1 and Fe from the soil than sodium fulvate. Treatment of oxidised soils with humic substances led to lower P-fixation by the soil. The data showed that humic substances played an important role in decreasing the phosphate-fixing capacity of the highly weathered Malaysian soils.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Soil |
| AGROVOC Term: | Rubber crops |
| AGROVOC Term: | Humic acids |
| AGROVOC Term: | Fulvic acids |
| AGROVOC Term: | Purification |
| AGROVOC Term: | Oxidation |
| AGROVOC Term: | Humic substances |
| AGROVOC Term: | Extraction |
| AGROVOC Term: | Aluminium |
| AGROVOC Term: | Phosphorus |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 04:44 |
| URI: | http://webagris.upm.edu.my/id/eprint/23530 |
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