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Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in eucalyptus grandis plantations

hal.structure.identifierCentro de Energia Nuclear na Agricultura
dc.contributor.authorASENSIO, Verónica
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorLACLAU, Jean-Paul
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDOMEC, Jean-Christophe
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorJORDAN-MEILLE, Lionel
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorBOUILLET, Jean-Pierre
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorNOUVELLON, Yann
hal.structure.identifierCentro de Energia Nuclear na Agricultura
dc.contributor.authorABREU-JUNIOR, Cassio Hamilton
dc.date.accessioned2024-04-08T11:59:06Z
dc.date.available2024-04-08T11:59:06Z
dc.date.issued2015
dc.date.conference2015-08-02
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195974
dc.description.abstractEnThe transport of water from moist soil layers to dry through the roots of some species is an important process for plant survival during long dry periods. The objective of the present study was to evaluate if Eucalyptus grandis roots growing in a tropical region characterized by long dry periods passively move water from deep to shallow soil layers, which is known as “hydraulic redistribution”. The experiment was carried out at the Itatinga experimental station (SP, Brazil) that included four contrasting experimental plots resulting from the combination of two set of treatments: with/without potassium fertilization (+K/-K, respectively) and with/without throughfall exclusion (+W/-W, respectively). Sap flow was measured in superficial Eucalyptus coarse roots from the end of the 2014 dry season to the end of the 2015 rainy. We detected reverse sap flow (water in superficial roots going to the soil surface far from the trunks) all of the months, even during the rainy season, and in all the treatments, except in -K-W, where reverse flow started two months after the beginning of the rains (January). The lowest flow densities in superficial roots were observed in -K and/or -W, but reverse flow occurred in more roots or during more days per month than in treatments +K and +W.
dc.language.isoen
dc.title.enEffects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in eucalyptus grandis plantations
dc.typeAutre communication scientifique (congrès sans actes - poster - séminaire...)
dc.subject.halSciences du Vivant [q-bio]
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title35. Congresso Brasileiro de Ciencia do solo
bordeaux.countryBR
bordeaux.conference.cityNatal
bordeaux.peerReviewedoui
hal.identifierhal-02741008
hal.version1
hal.invitednon
hal.conference.end2015-08-07
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02741008v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2015&rft.au=ASENSIO,%20Ver%C3%B3nica&LACLAU,%20Jean-Paul&DOMEC,%20Jean-Christophe&JORDAN-MEILLE,%20Lionel&BOUILLET,%20Jean-Pierre&rft.genre=conference


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