How does burning of rice straw affect CH4 and N2O emissions? A comparative experiment of different on-field straw management practices

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cg.contributor.affiliationInternational Rice Research Instituteen
cg.contributor.affiliationKarlsruhe Institute of Technologyen
cg.contributor.affiliationInternational Fertilizer Development Centeren
cg.contributor.crpClimate Change, Agriculture and Food Security
cg.coverage.countryPhilippines
cg.coverage.iso3166-alpha2PH
cg.coverage.regionAsia
cg.coverage.regionSouth-eastern Asia
cg.creator.identifierBjoern Ole Sander: 0000-0002-7967-6147
cg.creator.identifierMa. Carmelita Alberto: 0000-0002-9131-3429
cg.creator.identifierMartin Gummert: 0000-0003-1008-3244
cg.creator.identifierJames Quilty: 0000-0001-6794-7037
cg.creator.identifierJoseph M. Sandro: 0000-0002-8311-2299
cg.identifier.doihttps://doi.org/10.1016/j.agee.2016.12.042en
cg.identifier.projectCCAFS: FP3_SAMPLES
cg.identifier.projectCCAFS: FP3_VietnamLED
cg.issn0167-8809en
cg.journalAgriculture, Ecosystems and Environmenten
cg.subject.ccafsLOW EMISSIONS DEVELOPMENTen
cg.volume239en
dc.contributor.authorRomasanta, Ryan R.en
dc.contributor.authorSander, Björn Oleen
dc.contributor.authorGaihre, Yam Kantaen
dc.contributor.authorAlberto, Ma. Carmelita R.en
dc.contributor.authorGummert, Martinen
dc.contributor.authorQuilty, Jamesen
dc.contributor.authorSandro, Josephen
dc.contributor.authorCorrea, Teodoroen
dc.contributor.authorWassmann, Reineren
dc.date.accessioned2017-01-28T11:11:53Zen
dc.date.available2017-01-28T11:11:53Zen
dc.identifier.urihttps://hdl.handle.net/10568/79435
dc.titleHow does burning of rice straw affect CH4 and N2O emissions? A comparative experiment of different on-field straw management practicesen
dcterms.abstractOpen-burning of rice straw residues pollutes the air and contributes to global warming through emissions of greenhouse gases (GHGs). Although burning of straw residues emits large amounts of CO2, this component of the smoke is not considered as net GHG emissions and only concludes the annual carbon cycle that has started with photosynthesis. Hence, we focused on emissions of CH4 and N2O from open-field burning against a baseline of straw incorporation. The experimental approach combined a newly designed combustion chamber for the collection of smoke followed by chemical analysis (Exp. A) as well as field observations of soil-borne emissions for different straw treatments (Exp. B). At constant straw moisture of 10%, the mass-scaled Emission Factors (EFm) were 4.51 g CH4 and 0.069 g N2O per kg dry weight (kg−1dw) of straw. In Exp. B, we conducted field trials over two seasons with the following straw management practices: SRt − straw retained including stubbles and incorporated, PSRm − partial straw removal only stubbles incorporated, CSRm − complete straw removal including removal of stubbles, and SB − straw burned followed by incorporation of ash and unburned residues. Soil-borne emissions were recorded with a closed chamber approach whereas straw burning was computed indirectly using the EF from Exp. A. As metrics for comparison, we have used the GWP contributions of CH4 and N2O for the different straw management practices over two cropping seasons in the field. On an annual basis, SRt had the highest total GWP (8023 kg CO2eq ha−1). SB entailed a GWP of 4913 kg CO2eq ha−1 that was almost identical to the GWP of PSRm (4531 kg CO2eq ha−1). CSRm had the lowest GWP (3470 kg CO2eq ha−1) that was significantly lower than that of SRt. However, full GHG accounting of straw removed from the field will depend on the ensuing utilization of straw and the off-field emissions involved − which was outside of the boundaries of this study. The quantification of open field burning in this study can be instrumental for diverse purposes by providing data of an important component in emission inventories and carbon footprint analysis of rice.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationRomasanta RR, Sander BO, Gaihre YK, Alberto MC, Gummert M, Quilty J, Sandro J, Correa Jr T, Wassmann R. 2017. How does burning of rice straw affect CH4 and N2O emissions? A comparative experiment of different on-field straw management practices. Agriculture, Ecosystems & Environment 239:143-153.en
dcterms.extent143-153en
dcterms.issued2017-02
dcterms.languageen
dcterms.licenseCC-BY-NC-ND-4.0
dcterms.publisherElsevieren
dcterms.subjectclimate changeen
dcterms.subjectfood securityen
dcterms.subjectagricultureen
dcterms.subjectemissionen
dcterms.subjectecologyen
dcterms.typeJournal Article

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