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dc.contributor.authorDíaz-Espejo, Antonio-
dc.contributor.authorFernández Luque, José Enrique-
dc.date.accessioned2013-01-03T12:02:52Z-
dc.date.available2013-01-03T12:02:52Z-
dc.date.issued2009-
dc.identifierissn: 0567-7572-
dc.identifier.citationActa Horticulturae 846: 271-276 (2009)-
dc.identifier.urihttp://hdl.handle.net/10261/63748-
dc.description6 pages, 4 figures, 17 references.-- Trabajo presentado al 7th International Workshop on Sap Flow, celebrado del 21-24 de octubre 2008, en Sevilla, España.-
dc.description.abstractWe have tested the hypothesis that if sap flow in the outer rings changes as a consequence of stomatal response to environmental variables, then we can infer canopy conductance from sap-flow measurements. In 2004 we ran experiments to calibrate the tz compensation heat-pulse method in three fruit tree species with contrasting hydraulic characteristics and water requirements: olive, plum and orange. In some of those experiments one tree of each species was cut at ground level and the butt placed in a reservoir with free water. Then we measured the actual tree transpiration (Ep) every half hour, as well as the total leaf area. The Ep values, together with simultaneous measurements of micrometeorological variables over the trees, were used to calculate reliable values of canopy conductance by inverting the Penman-Monteith equation (Gc). We also obtained independent values of canopy conductance from leaf gas-exchange measurements carried out in the three instrumented trees (gc), and checked that they were similar to the Gc results. Our gc data were compared to tz profiles recorded in the trunk to test our hypothesis that the diurnal pattern of tz profiles can be used to derive reliable values of canopy conductance. Results from the three tested species showed a good correlation between tz and gc, thus confirming our hypothesis.-
dc.description.sponsorshipThis work was financed by the Dirección General de Investigación of the Spanish Ministry of Science and Technology (Research Projects AGL2002-04048-CO3-01 and PTR1995-0693-OP-02-01). A. Diaz-Espejo was beneficiary of the Program Ramón y Cajal (M.E.C.).-
dc.language.isoeng-
dc.publisherInternational Society for Horticultural Science-
dc.rightsopenAccess-
dc.subjectOlive-
dc.subjectPlum-
dc.subjectOrange-
dc.subjectSap flow profiles-
dc.subjectTranspiration-
dc.subjectPtomatal conductance-
dc.titleUse of sap-flow profiles in trunks to derive canopy conductance-
dc.typeartículo-
dc.date.updated2013-01-03T12:02:53Z-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinisterio de Ciencia y Tecnología (España)-
dc.contributor.funderMinisterio de Educación y Ciencia (España)-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100006280es_ES
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