Pedogenic,  mineralogical and land-use controls on organic carbon stabilization in two contrasting soils

Plante, A. F.; Virto Quecedo, Íñigo; Malhi, S. S.

Publication:
Pedogenic, mineralogical and land-use controls on organic carbon stabilization in two contrasting soils

dc.contributor.author	Plante, A. F.	es_ES
dc.contributor.author	Virto Quecedo, Íñigo
dc.contributor.author	Malhi, S. S.	es_ES
dc.contributor.department	Ciencias del Medio Natural	es_ES
dc.contributor.department	Natura Ingurunearen Zientziak	eu
dc.date.accessioned	2014-05-28T09:28:18Z
dc.date.available	2014-05-28T09:28:18Z
dc.date.issued	2010
dc.description	UPNa. Departamento de Ciencias del Medio Natural. Área de Edafología y Química Agrícola	es_ES
dc.description.abstract	Organo-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.mimetype	application/pdf	en
dc.identifier.doi	10.4141/CJSS09052
dc.identifier.issn	0008-4271 (print)
dc.identifier.issn	1918-1841 (electronic)
dc.identifier.other	656
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/10630
dc.language.iso	eng	en
dc.publisher	Agricultural Institute of Canada	en
dc.relation.ispartof	Canadian Journal of Soil Science, 2010, 90(1). Págs. 15-26	en
dc.relation.publisherversion	https://dx.doi.org/10.4141/CJSS09052
dc.rights.accessRights	Acceso abierto / Sarbide irekia	es
dc.rights.accessRights	info:eu-repo/semantics/openAccess	en
dc.subject	Cultivation	en
dc.subject	Sequential density fractionation	en
dc.subject	Organic carbon	en
dc.subject	Organic matter	en
dc.subject	Thermal analysis	en
dc.subject	Mean residence time	en
dc.subject	Density fractionation	en
dc.subject	Organomineral complexes	en
dc.subject	Matter fractions	en
dc.subject	Thermal analysis	en
dc.subject	Clay mineralogy	en
dc.subject	Tropical soils	en
dc.subject	Quality	en
dc.subject	Thermogravimetry	en
dc.subject	Mechanisms	en
dc.subject	Agriculture	en
dc.title	Pedogenic, mineralogical and land-use controls on organic carbon stabilization in two contrasting soils	en
dc.type	Artículo / Artikulua	es
dc.type	info:eu-repo/semantics/article	en
dc.type.version	Versión aceptada / Onetsi den bertsioa	es
dc.type.version	info:eu-repo/semantics/acceptedVersion	en
dspace.entity.type	Publication
relation.isAuthorOfPublication	82a7f816-92e7-455e-a217-bf3dee861db9
relation.isAuthorOfPublication.latestForDiscovery	82a7f816-92e7-455e-a217-bf3dee861db9