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The estimation of the GHG balance of agroecosystems is essential to evaluate the impact of agriculture on the composition of the atmosphere. Cultivated soils may act as a sink or a source of CO2 and usually emit N2O. The aim of the present study was to assess the CO2 and N2O balances, and to analyze the relationships between N2O fluxes and environmental variables for two soybean growing seasons and the fallow period between them, in an agricultural field [ver mas...]
dc.contributor.authorLewczuk, Nuria Andrea
dc.contributor.authorPosse Beaulieu, Gabriela
dc.contributor.authorRichter, Klaus
dc.contributor.authorAchkar, Antonio
dc.coverage.spatialPampa (general region)
dc.date.accessioned2018-10-05T15:00:38Z
dc.date.available2018-10-05T15:00:38Z
dc.date.issued2017-06
dc.identifier.issn0167-1987
dc.identifier.otherhttps://doi.org/10.1016/j.still.2017.01.017
dc.identifier.urihttp://hdl.handle.net/20.500.12123/3561
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0167198717300259?via%3Dihub
dc.description.abstractThe estimation of the GHG balance of agroecosystems is essential to evaluate the impact of agriculture on the composition of the atmosphere. Cultivated soils may act as a sink or a source of CO2 and usually emit N2O. The aim of the present study was to assess the CO2 and N2O balances, and to analyze the relationships between N2O fluxes and environmental variables for two soybean growing seasons and the fallow period between them, in an agricultural field in the Pampas region of Argentina. The fluxes of CO2 and N2O were measured by the eddy covariance and the static-chamber methods, respectively. The net ecosystem exchange from sowing to harvest was −2543 and −2307 kg CO2-C ha−1, for the first and second growing seasons, respectively. The N2O net balance over the same periods was 1.45 and 0.96 kg N2O-N ha−1. A multivariate analysis showed that during the growing season the most important variable influencing N2O emission was % water filled pore space (% WFPS), followed by nitrate content and soil temperature. During fallow, soil temperature was the main control factor, followed by % WPFS. The total balance (including CO2 and N2O) showed that the soil gained 753.5 kg Ceq ha−1 on average during cultivarion cycle. Taking into account the fallow period, the global balance resulted in a carbon loss of 1328.5 kg Ceq ha−1 over about one year. Our results clearly indicate the need to incorporate winter cover crops for improving the production system, as they can provide carbon to the soil and use the available stubble nitrogen from the previous crop.eng
dc.formatapplication/pdfeng
dc.language.isoeng
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesseng
dc.sourceSoil and tillage research 169 : 65-70. (June 2017)eng
dc.subjectSojaes_AR
dc.subjectSoybeanseng
dc.subjectCarbon Dioxideeng
dc.subjectDióxido de Carbonoes_AR
dc.subjectNitrous Oxideeng
dc.subjectÓxido Nitrosoes_AR
dc.subjectCase Studieseng
dc.subjectEstudios de Casos Prácticoses_AR
dc.subject.otherCarbon Balanceeng
dc.subject.otherBalance de Carbonoes_AR
dc.subject.otherEddy Covarianceeng
dc.subject.otherVented Static Chamberseng
dc.subject.otherRegión Pampenaes_AR
dc.titleCO2 and N2O flux balance on soybean fields during growth and fallow periods in the Argentine Pampas—A study caseeng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.origenInstituto de Clima y Aguaes_AR
dc.description.filFil: Lewczuk, Nuria Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentinaes_AR
dc.description.filFil: Posse Beaulieu, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentinaes_AR
dc.description.filFil: Richter, Klaus. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentinaes_AR
dc.description.filFil: Achkar, Antonio. Universidad Católica de Santa Fe. Área Informática; Argentinaes_AR
dc.subtypecientifico


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