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dc.contributor.authorGarcía-Pausas, Jordi
dc.contributor.authorCasals, Pere
dc.contributor.authorCamarero, Lluís
dc.contributor.authorHuguet, Carme
dc.contributor.authorThompson, Roy
dc.contributor.authorSebastià, Ma. T.
dc.contributor.authorRomanyà i Socoró, Joan
dc.date.accessioned2016-12-12T09:38:39Z
dc.date.issued2008
dc.identifier.issn0038-0717
dc.identifier.urihttp://hdl.handle.net/10459.1/58789
dc.description.abstractAlthough a large amount of soil carbon (C) is stored in subsurface soils, most studies on soil C dynamics focus on the upper layers. The aim of this study is to assess the factors that regulate C mineralization in mountain grassland soils under standard laboratory conditions to compare regulation mechanisms at surface and subsurface horizons. For this purpose soil samples of surface and subsurface horizons from 35 locations were incubated under laboratory conditions, CO2 efflux rates were measured and microbial biomass C (MBC) and net N mineralization were determined. We also analysed the samples for pH, extractable C after fumigation (Cfe), potentially mineralizable N (PMN), reactive and non-reactive P, sum of exchangeable bases and clay content in order to assess the influence of soil characteristics on C mineralization. The influence of climate of each site on soil C mineralization under the same laboratory conditions was also explored for surface and subsurface horizons. C mineralization in surface horizons related positively with Cfe content, suggesting that microbial activity in this horizon was mainly regulated by the availability of C. By contrast, in subsurface horizons, C mineralization related with PMN and was independent of measured C fractions, suggesting that microbial activity in subsurface horizons was limited by the availability of N and that the available forms of C were more stable in these horizons. The effects of local climate on laboratory C mineralization were significant in both soil horizons, with lower rates of C mineralization being recorded in soils from wetter and warmer sites. This fact, suggested that the C stabilisation mechanisms in mountain grassland soils may be affected by the climate in which soils develop.ca_ES
dc.description.sponsorshipThis study was partially funded by the European Commission (EMERGE and CarboEurope-IP projects), by the Spanish Ministry of Science and Education (CARBOPAS and Agroeco projects) and INIA (Balangeis project). CEAM is financially supported by Generalitat Valenciana and Bancaixa.ca_ES
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1016/j.soilbio.2008.08.001ca_ES
dc.relation.ispartofSoil Biology and Biochemistry, 2008, vol. 40, núm. 11, p. 2803-2810ca_ES
dc.rights(c) Elsevier Ltd., 2008ca_ES
dc.subjectCarbon mineralizationca_ES
dc.subjectClimateca_ES
dc.subjectMicrobial biomass carbonca_ES
dc.subjectMountain grasslandsca_ES
dc.titleFactors regulating carbon mineralization in the surface and subsurface soils of Pyrenean mountain grasslandsca_ES
dc.typearticleca_ES
dc.identifier.idgrec014527
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_ES
dc.identifier.doihttps://doi.org/10.1016/j.soilbio.2008.08.001
dc.date.embargoEndDate2025-01-01


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