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Effect of biochar addition on C mineralisation and soil organic matter priming in two subsoil horizons

hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES]
dc.contributor.authorNAISSE, Christophe
hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES]
dc.contributor.authorGIRARDIN, Cyril
hal.structure.identifierAménagement, Développement, Environnement, Santé et Sociétés [ADES]
dc.contributor.authorDAVASSE, Bernard
hal.structure.identifierUnité de Recherche Pluridisciplinaire Prairies et Plantes Fourragères [P3F]
hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES]
dc.contributor.authorCHABBI, Abad
hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES]
dc.contributor.authorRUMPEL, Cornelia
dc.date.issued2015
dc.identifier.issn1439-0108
dc.description.abstractEn[b]Purpose[/b] The impact of biochar on subsoil organic carbon mineralisation has never been assessed despite its susceptibility to downward transport after soil amendment. In this study, we analysed the potential mineralisation of biochar and plant material as well as their effect on native soil organic matter (SOM) decomposition in subsoil horizons.[br/][b]Materials and methods[/b] We used C-13-labelled biochar and plant material to allow disentangling substrate mineralisation and priming effects. The substrates were added to two mountain subsoils under different land use and incubated for 1 year under optimum conditions. We analysed for physical parameters and C mineralisation in the two soils. Moreover, microbial communities were assessed by phospholipid fatty acid (PLFA) analyses.[br/][b]Results and discussion[/b] Our results indicated contrasting potential C mineralisation of subsoils under different land use probably related to sampling depth, contribution of stabilised organic matter compounds, carbon content as well as quality. In general, very low proportions of biochar were mineralised in the two soils as compared to plant material. The mineralisation of each of the added substrates (biochar and plant material) was slightly, but significantly different in the two soils. Native C mineralisation was much higher after plant material addition than after biochar addition. Subsoil type influenced the kind and magnitude of priming effects for both added substrates.[br/][b]Conclusion[/b] Biochar mineralisation and its priming effects in subsoil are small as compared to uncharred plant litter. We suggest that substrate mineralization and priming effects induced on subsoil organic matter are dependent on the composition of the added substrate, as well as soil parameters rather than microbial community characteristics.
dc.description.sponsorshipDispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux - ANR-11-LABX-0010
dc.language.isoen
dc.publisherSpringer Verlag
dc.subject.en(13)C-labelled biochar
dc.subject.enmineralisation
dc.subject.enpriming
dc.subject.ensubsoil
dc.title.enEffect of biochar addition on C mineralisation and soil organic matter priming in two subsoil horizons
dc.typeArticle de revue
dc.identifier.doi10.1007/s11368-014-1002-5
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.description.sponsorshipEuropeBiochar for Carbon sequestration and large-scale removal of greenhouse gases (GHG) from the atmosphere
bordeaux.journalJournal of Soils and Sediments
bordeaux.page825-832
bordeaux.volume15
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01215323
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01215323v1
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