Arsenic contamination of rainfed versus irrigated rice
Arsenic (As) contamination of rice remains a major human health issue in Asia. Most research has been on irrigated rice. However much of the projected increase in global rice demand over coming decades must be met by rainfed lowland systems, for which As relations are poorly understood. We present t...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2025
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/176708 |
| _version_ | 1855521461335228416 |
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| author | Ingram, Ben Habib, Muhammad Ashraful Johnson-Beebout, Sarah E. Acuin, Cecilia Corstanje, Ron Simmons, Robert W. Kirk, Guy J.D. |
| author_browse | Acuin, Cecilia Corstanje, Ron Habib, Muhammad Ashraful Ingram, Ben Johnson-Beebout, Sarah E. Kirk, Guy J.D. Simmons, Robert W. |
| author_facet | Ingram, Ben Habib, Muhammad Ashraful Johnson-Beebout, Sarah E. Acuin, Cecilia Corstanje, Ron Simmons, Robert W. Kirk, Guy J.D. |
| author_sort | Ingram, Ben |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Arsenic (As) contamination of rice remains a major human health issue in Asia. Most research has been on irrigated rice. However much of the projected increase in global rice demand over coming decades must be met by rainfed lowland systems, for which As relations are poorly understood. We present the most comprehensive survey to date of As in rice in farmers’ fields across Bangladesh, covering both irrigated and rainfed systems. We collected rice grain and soil at 943 sites in the three rice growing seasons: irrigated Boro, rainfed Aus, and longer-duration rainfed Aman. Grain As concentrations increased in the order Aman ≪ Boro < Aus with 2, 25 and 41 % of the sites exceeding permitted thresholds, respectively. The greater concentration in Aus than Boro challenges the accepted wisdom that contaminated irrigation water is the main source of As. The main growth and grain filling periods, when most As is taken up, coincide in Aus with the peak of the monsoon rains, suggesting a link between rainfall and high grain As. We suggest this is due to stronger soil reducing conditions and hence As solubility during peak rainfall. We discuss implications for rainfed lowland rice across Asia and mitigation options. |
| format | Journal Article |
| id | CGSpace176708 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1767082025-12-02T10:59:51Z Arsenic contamination of rainfed versus irrigated rice Ingram, Ben Habib, Muhammad Ashraful Johnson-Beebout, Sarah E. Acuin, Cecilia Corstanje, Ron Simmons, Robert W. Kirk, Guy J.D. arsenic rice rainfed farming irrigation water cropping systems crop yield soil chemistry soi fertility contaminants heavy metals soil pollution Arsenic (As) contamination of rice remains a major human health issue in Asia. Most research has been on irrigated rice. However much of the projected increase in global rice demand over coming decades must be met by rainfed lowland systems, for which As relations are poorly understood. We present the most comprehensive survey to date of As in rice in farmers’ fields across Bangladesh, covering both irrigated and rainfed systems. We collected rice grain and soil at 943 sites in the three rice growing seasons: irrigated Boro, rainfed Aus, and longer-duration rainfed Aman. Grain As concentrations increased in the order Aman ≪ Boro < Aus with 2, 25 and 41 % of the sites exceeding permitted thresholds, respectively. The greater concentration in Aus than Boro challenges the accepted wisdom that contaminated irrigation water is the main source of As. The main growth and grain filling periods, when most As is taken up, coincide in Aus with the peak of the monsoon rains, suggesting a link between rainfall and high grain As. We suggest this is due to stronger soil reducing conditions and hence As solubility during peak rainfall. We discuss implications for rainfed lowland rice across Asia and mitigation options. 2025-10 2025-09-30T08:31:57Z 2025-09-30T08:31:57Z Journal Article https://hdl.handle.net/10568/176708 en Open Access application/pdf Elsevier Ingram, Ben, Muhammad Ashraful Habib, Sarah E. Johnson-Beebout, Cecilia Acuin, Ron Corstanje, Robert W. Simmons, and Guy JD Kirk. "Arsenic contamination of rainfed versus irrigated rice." Environmental Pollution (2025): 126856. |
| spellingShingle | arsenic rice rainfed farming irrigation water cropping systems crop yield soil chemistry soi fertility contaminants heavy metals soil pollution Ingram, Ben Habib, Muhammad Ashraful Johnson-Beebout, Sarah E. Acuin, Cecilia Corstanje, Ron Simmons, Robert W. Kirk, Guy J.D. Arsenic contamination of rainfed versus irrigated rice |
| title | Arsenic contamination of rainfed versus irrigated rice |
| title_full | Arsenic contamination of rainfed versus irrigated rice |
| title_fullStr | Arsenic contamination of rainfed versus irrigated rice |
| title_full_unstemmed | Arsenic contamination of rainfed versus irrigated rice |
| title_short | Arsenic contamination of rainfed versus irrigated rice |
| title_sort | arsenic contamination of rainfed versus irrigated rice |
| topic | arsenic rice rainfed farming irrigation water cropping systems crop yield soil chemistry soi fertility contaminants heavy metals soil pollution |
| url | https://hdl.handle.net/10568/176708 |
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