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Potential of alternate wetting and drying irrigation practices for the mitigation of ghg emissions from rice fields: Two cases in central luzon (philippines)

Sander, B. O.; Schneider, P.; Romasanta, R.; Samoy-Pascual, K.; Sibayan, E. B.; Asis, C. A.; Wassmann, R.

Abstract:
Reducing methane (CH$_{4}$) emission from paddy rice production is an important target for many Asian countries in order to comply with their climate policy commitments. National greenhouse gas (GHG) inventory approaches like the Tier-2 approach of the Intergovernmental Panel on Climate Change (IPCC) are useful to assess country-scale emissions from the agricultural sector. In paddy rice, alternate wetting and drying (AWD) is a promising and well-studied water management technique which, as shown in experimental studies, can effectively reduce CH$_{4}$) emissions. However, so far little is known about GHG emission rates under AWD when the technique is fully controlled by farmers. This study assesses CH$_{4}$) and nitrous oxide (N$_{2}$)O) fluxes under continuous flooded (CF) and AWD treatments for seven subsequent seasons on farmers’ fields in a pumped irrigation system in Central Luzon, Philippines. Under AWD management, CH$_{4}$) emissions were substantially reduced (73% in dry season (DS), 21% in wet season (WS)). In all treatments, CH$_{4}$) is the major contributor to the total GHG emission and is, thus, identified as the driving force to the global warming potential (GWP). ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124111
Veröffentlicht am 19.10.2020
Originalveröffentlichung
DOI: 10.3390/agriculture10080350
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2077-0472
KITopen-ID: 1000124111
Erschienen in Agriculture
Band 10
Heft 8
Seiten 1-19
Vorab online veröffentlicht am 12.08.2020
Schlagwörter agriculture; Oryza sativa, methane, greenhouse gases, mitigation, water management, irrigation technology
Nachgewiesen in Scopus
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