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dc.creatorPlante, A. F.es_ES
dc.creatorVirto Quecedo, Íñigoes_ES
dc.creatorMalhi, S. S.es_ES
dc.date.accessioned2014-05-28T09:28:18Z
dc.date.available2014-05-28T09:28:18Z
dc.date.issued2010
dc.identifier.issn0008-4271 (print)
dc.identifier.issn1918-1841 (electronic)
dc.identifier.other656
dc.identifier.urihttps://hdl.handle.net/2454/10630
dc.descriptionUPNa. Departamento de Ciencias del Medio Natural. Área de Edafología y Química Agrícolaes_ES
dc.description.abstractOrgano-mineral complexation in soils is strongly controlled by pedogenesis, but the mechanisms controlling it and its interaction with cultivation are not yet well understood. We compared the mineralogy and quality of organic carbon (C) among organo-mineral fractions from two soils with contrasting pedogenic origin. Sequential density fractionation (SDF; using 1.6, 1.8, 2.1, 2.4 and 2.6 g mL(-1) sodium polytungstate solutions) followed by thermal analysis was applied to a Chernozem from Ellerslie, Alberta, and a Luvisol from Breton, Alberta, each under native and cultivated land uses. Similar clay mineralogy suggested that pedogenic controls on organic C stabilization were related to long-term vegetation cover. In addition to large differences in total organic C quantities, bulk soil and isolated fractions showed significant differences in organic C quality. Samples under native vegetation revealed greater organo-mineral complexation at Ellerslie compared with Breton, as expressed by less solubilisation, more organic C recovered in intermediate-density fractions, and exothermic differential scanning calorimetry peak signals associated with more stable forms of organic C. Long-term cultivation resulted in an overall shift to more stable organo-mineral complexes. The proportion of soil C in the 2.1-2.4 g mL(-1) fraction increased under cultivation from 21 to 32% in Breton samples, and from 6 to 16% in Ellerslie samples. The quality of inherited pedogenic soil organic C stored in a soil thus appears to determine its response to long-term cultivation.en
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherAgricultural Institute of Canadaen
dc.relation.ispartofCanadian Journal of Soil Science, 2010, 90(1). Págs. 15-26en
dc.subjectCultivationen
dc.subjectSequential density fractionationen
dc.subjectOrganic carbonen
dc.subjectOrganic matteren
dc.subjectThermal analysisen
dc.subjectMean residence timeen
dc.subjectDensity fractionationen
dc.subjectOrganomineral complexesen
dc.subjectMatter fractionsen
dc.subjectThermal analysisen
dc.subjectClay mineralogyen
dc.subjectTropical soilsen
dc.subjectQualityen
dc.subjectThermogravimetryen
dc.subjectMechanismsen
dc.subjectAgricultureen
dc.titlePedogenic, mineralogical and land-use controls on organic carbon stabilization in two contrasting soilsen
dc.typeArtículo / Artikuluaes
dc.typeinfo:eu-repo/semantics/articleen
dc.contributor.departmentUniversidad Pública de Navarra. Departamento de Ciencias del Medio Naturales_ES
dc.contributor.departmentNafarroako Unibertsitate Publikoa. Natura Ingurunearen Zientziak Sailaeu
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.identifier.doi10.4141/CJSS09052
dc.relation.publisherversionhttps://dx.doi.org/10.4141/CJSS09052
dc.type.versionVersión aceptada / Onetsi den bertsioaes
dc.type.versioninfo:eu-repo/semantics/acceptedVersionen


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