Phosphorus status of amended soil as assessed by conventional and isotopic methods
Organic manures and phosphate rocks (PRs) can greatly enhance phosphorus (P) availability in soils with high P fixation. However, the pathways by which this occurs are still not well understood. Reliable estimation of P pools and available P dynamics can greatly assist in the identification of these...
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| Format: | Article |
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Informa UK Limited
2003
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| Online Access: | http://psasir.upm.edu.my/id/eprint/115461/ |
| _version_ | 1848866782705614848 |
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| author | Bah, Abdul R. Zaharah, A.R. Hussin, A. Husni, M.H.A. Halimi, M.S. |
| author_facet | Bah, Abdul R. Zaharah, A.R. Hussin, A. Husni, M.H.A. Halimi, M.S. |
| author_sort | Bah, Abdul R. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Organic manures and phosphate rocks (PRs) can greatly enhance phosphorus (P) availability in soils with high P fixation. However, the pathways by which this occurs are still not well understood. Reliable estimation of P pools and available P dynamics can greatly assist in the identification of these mechanisms. The effect of PRs and green manures (GMs) on soil P status was evaluated by conventional and isotopic methods in an amended acid soil (Selangor series) after 64 weeks of incubation. The treatments were factorial combination of P fertilizers-PRs from Algeria, China and North Carolina (APR, CPR and NCPR) plus triple super phosphate (TSP)-and GMs from legumes Calopogonium (Calopogonium caeruleum) and Gliricidia (Gliricidia sepium), and a non-legume-Imperata (Imperata cylindrica). Soil samples were analyzed for available P, P fractions, sorption characteristics, and pools of P that are exchangeable at various times using 32P isotope exchange kinetics. The legume GMs reduced P sorption maximum by over 80%, and the GMs alone or together with P fertilizers made significant improvements in available P, and increased P in Fe-P (> 2 times) and A1-P (18 - > 20 times) fractions, which made up the pools that are exchangeable in less than 1 year. Phosphate from the legume GMs saturated sorption sites by reversible sorption, while that from P fertilizers was irreversibly retained and expanded the unavailable fraction to over 90% of total P. The importance of GMs in the management of P in high P-retaining soils is reaffirmed. |
| first_indexed | 2025-11-15T14:26:05Z |
| format | Article |
| id | upm-115461 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:26:05Z |
| publishDate | 2003 |
| publisher | Informa UK Limited |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1154612025-03-04T08:12:42Z http://psasir.upm.edu.my/id/eprint/115461/ Phosphorus status of amended soil as assessed by conventional and isotopic methods Bah, Abdul R. Zaharah, A.R. Hussin, A. Husni, M.H.A. Halimi, M.S. Organic manures and phosphate rocks (PRs) can greatly enhance phosphorus (P) availability in soils with high P fixation. However, the pathways by which this occurs are still not well understood. Reliable estimation of P pools and available P dynamics can greatly assist in the identification of these mechanisms. The effect of PRs and green manures (GMs) on soil P status was evaluated by conventional and isotopic methods in an amended acid soil (Selangor series) after 64 weeks of incubation. The treatments were factorial combination of P fertilizers-PRs from Algeria, China and North Carolina (APR, CPR and NCPR) plus triple super phosphate (TSP)-and GMs from legumes Calopogonium (Calopogonium caeruleum) and Gliricidia (Gliricidia sepium), and a non-legume-Imperata (Imperata cylindrica). Soil samples were analyzed for available P, P fractions, sorption characteristics, and pools of P that are exchangeable at various times using 32P isotope exchange kinetics. The legume GMs reduced P sorption maximum by over 80%, and the GMs alone or together with P fertilizers made significant improvements in available P, and increased P in Fe-P (> 2 times) and A1-P (18 - > 20 times) fractions, which made up the pools that are exchangeable in less than 1 year. Phosphate from the legume GMs saturated sorption sites by reversible sorption, while that from P fertilizers was irreversibly retained and expanded the unavailable fraction to over 90% of total P. The importance of GMs in the management of P in high P-retaining soils is reaffirmed. Informa UK Limited 2003 Article PeerReviewed Bah, Abdul R. and Zaharah, A.R. and Hussin, A. and Husni, M.H.A. and Halimi, M.S. (2003) Phosphorus status of amended soil as assessed by conventional and isotopic methods. Communications in Soil Science and Plant Analysis, 34 (17-18). pp. 2659-2681. ISSN 0010-3624; eISSN: 1532-2416 https://www.tandfonline.com/doi/full/10.1081/CSS-120024792 10.1081/CSS-120024792 |
| spellingShingle | Bah, Abdul R. Zaharah, A.R. Hussin, A. Husni, M.H.A. Halimi, M.S. Phosphorus status of amended soil as assessed by conventional and isotopic methods |
| title | Phosphorus status of amended soil as assessed by conventional and isotopic methods |
| title_full | Phosphorus status of amended soil as assessed by conventional and isotopic methods |
| title_fullStr | Phosphorus status of amended soil as assessed by conventional and isotopic methods |
| title_full_unstemmed | Phosphorus status of amended soil as assessed by conventional and isotopic methods |
| title_short | Phosphorus status of amended soil as assessed by conventional and isotopic methods |
| title_sort | phosphorus status of amended soil as assessed by conventional and isotopic methods |
| url | http://psasir.upm.edu.my/id/eprint/115461/ http://psasir.upm.edu.my/id/eprint/115461/ http://psasir.upm.edu.my/id/eprint/115461/ |