Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation
Large parts of lowland areas in Southeast Asia were submerged in seawater some 4300 years ago due to a rise in sea level. During this period, the coastal plains in the region were pyritised. Agricultural development led to oxidisation of the pyrite (FeS2) which in turn allowed weathered mineral sili...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
2017
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| Online Access: | http://psasir.upm.edu.my/id/eprint/52525/1/02%20JTAS-0708-2014-6thProof.pdf |
| _version_ | 1825930742519037952 |
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| author | Jusop, Shamshuddin Panhwar, Qurban Ali Jamaludin, Alia Farhana Mohd Ali Raini, Siti Shazana Othman, Radziah Ishak, Che Fauziah |
| author_facet | Jusop, Shamshuddin Panhwar, Qurban Ali Jamaludin, Alia Farhana Mohd Ali Raini, Siti Shazana Othman, Radziah Ishak, Che Fauziah |
| author_sort | Jusop, Shamshuddin |
| collection | UPM |
| description | Large parts of lowland areas in Southeast Asia were submerged in seawater some 4300 years ago due to a rise in sea level. During this period, the coastal plains in the region were pyritised. Agricultural development led to oxidisation of the pyrite (FeS2) which in turn allowed weathered mineral silicates to be present in the sediments. High levels of Al and/or Fe are thus present in the soils/water that affect plants and aquatic life. Rice grown on the so-called acid sulfate soils suffer from low pH and Al 3+ and/or Fe2+ toxicity, with yields below the national average. The critical pH and Al concentration for rice growth is 6 and 15-30 uM respectively. The soil become infertile due to high concentrations of acid sulfate. Application of ground magnesium limestone (GML) or basalt in combination with bio-fertiliser fortified with phosphate-solubilising bacteria (PSB) can help reduce the acid sulfate. The PSB not only excrete organic acids that inactivate Al and Fe via chelation, but also increase soil pH to the level that precipitates Al as inert Al-hydroxides. Additionally, rice roots are able to excrete organic acids under the presence of high concentration of Al and/or Fe, which further reduces the availability of Al and Fe in the water. |
| first_indexed | 2024-03-06T09:16:11Z |
| format | Article |
| id | upm.eprints-52525 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:16:11Z |
| publishDate | 2017 |
| publisher | Universiti Putra Malaysia Press |
| record_format | dspace |
| spelling | upm.eprints-525252017-06-07T03:03:21Z http://psasir.upm.edu.my/id/eprint/52525/ Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation Jusop, Shamshuddin Panhwar, Qurban Ali Jamaludin, Alia Farhana Mohd Ali Raini, Siti Shazana Othman, Radziah Ishak, Che Fauziah Large parts of lowland areas in Southeast Asia were submerged in seawater some 4300 years ago due to a rise in sea level. During this period, the coastal plains in the region were pyritised. Agricultural development led to oxidisation of the pyrite (FeS2) which in turn allowed weathered mineral silicates to be present in the sediments. High levels of Al and/or Fe are thus present in the soils/water that affect plants and aquatic life. Rice grown on the so-called acid sulfate soils suffer from low pH and Al 3+ and/or Fe2+ toxicity, with yields below the national average. The critical pH and Al concentration for rice growth is 6 and 15-30 uM respectively. The soil become infertile due to high concentrations of acid sulfate. Application of ground magnesium limestone (GML) or basalt in combination with bio-fertiliser fortified with phosphate-solubilising bacteria (PSB) can help reduce the acid sulfate. The PSB not only excrete organic acids that inactivate Al and Fe via chelation, but also increase soil pH to the level that precipitates Al as inert Al-hydroxides. Additionally, rice roots are able to excrete organic acids under the presence of high concentration of Al and/or Fe, which further reduces the availability of Al and Fe in the water. Universiti Putra Malaysia Press 2017 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/52525/1/02%20JTAS-0708-2014-6thProof.pdf Jusop, Shamshuddin and Panhwar, Qurban Ali and Jamaludin, Alia Farhana and Mohd Ali Raini, Siti Shazana and Othman, Radziah and Ishak, Che Fauziah (2017) Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation. Pertanika Journal of Tropical Agricultural Science, 40 (2). pp. 225-246. ISSN 1511-3701; ESSN: 2231-8542 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2040%20(2)%20May.%202017/02%20JTAS-0708-2014-6thProof.pdf |
| spellingShingle | Jusop, Shamshuddin Panhwar, Qurban Ali Jamaludin, Alia Farhana Mohd Ali Raini, Siti Shazana Othman, Radziah Ishak, Che Fauziah Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation |
| title | Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation |
| title_full | Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation |
| title_fullStr | Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation |
| title_full_unstemmed | Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation |
| title_short | Formation and utilisation of acid sulfate soils in Southeast Asia for sustainable rice cultivation |
| title_sort | formation and utilisation of acid sulfate soils in southeast asia for sustainable rice cultivation |
| url | http://psasir.upm.edu.my/id/eprint/52525/1/02%20JTAS-0708-2014-6thProof.pdf |
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