Effect of water and straw management practices on methane emissions from rice fields: A review through a meta-analysis
[EN] Rice fields contribute substantially to global warming of the atmosphere through emission of methane (CH4). This article reviews the state of the art of factors affecting CH4 emissions in rice fields, focusing on soil organic matter content and water management practices. A quantitative relatio...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/78367 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/78367 |
| Access Level: | acceso abierto |
| Palabra clave: | Atmospheric pollution Greenhouse gases Paddy field Regression modeling Water regime Added values Application rates Biochar Controlled conditions Effect of water Emission factors Flooded rice Flooded soil Growing period Literature survey Management practices Meta-analysis Methane emissions Mid-season drainage Mitigation strategy National emission inventories Paddy fields Recommended practice Rice fields Rice straws Soil organic matter contents State of the art Straw management Water management systems Byproducts Floods Global warming Methane Solvents Substrates Water management Water pollution Factor analysis Organic matter Water Agriculture Atmosphere Combustion Flooding Greenhouse effect Greenhouse gas Irrigation (agriculture) Methanogenesis Nonhuman Plant Review Rice Rice field Soil Straw BIOLOGIA ANIMAL PRODUCCION ANIMAL |
| Sumario: | [EN] Rice fields contribute substantially to global warming of the atmosphere through emission of methane (CH4). This article reviews the state of the art of factors affecting CH4 emissions in rice fields, focusing on soil organic matter content and water management practices. A quantitative relationship between these factors was established through a meta-analysis based on a literature survey. This relationship can be useful to update emission factors used to estimate CH4 in the National Emission Inventories. Methane emissions in rice fields can be as much as 90% higher in continuously flooded rice fields compared with other water management practices, independent from straw addition. Water management systems that involve absence of flooding in total or for part of the growing period such as midseason drainages, intermittent flooding, and percolation control, can reduce CH4 emissions substantially. Moreover, CH4 emissions increase with the amount of straw added up to 7.7 t/ha for continuously flooded soils and up to 5.1 t/ha for other water regimes. Above these levels, no further increase is produced with further addition of straw. With regard to rice straw management mitigation strategies, recommended practices are composting rice straw, straw burning under controlled conditions, recollecting rice straw for biochar production, generation of energy, to be used as a substrate, or to obtain other byproducts with added value. This review improves the understanding of the relationship between straw application rate, water regimes, and CH4 emissions from rice fields to date. This relationship can help to select the most appropriate management practices to improve current mitigation strategies to reduce atmospheric CH4. © 2012 Mary Ann Liebert, Inc. |
|---|