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Comparative assessment of five methods of determining sap flow in peach trees

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Comparative assessment of five methods of determining sap flow in peach trees

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dc.contributor.author González Altozano, Pablo es_ES
dc.contributor.author Pavel, E.W. es_ES
dc.contributor.author Oncins, J.A. es_ES
dc.contributor.author Doltra, J. es_ES
dc.contributor.author Cohen, M. es_ES
dc.contributor.author Paço, T. es_ES
dc.contributor.author Massai, R. es_ES
dc.contributor.author Castel, J.R. es_ES
dc.date.accessioned 2024-02-28T19:03:50Z
dc.date.available 2024-02-28T19:03:50Z
dc.date.issued 2008-05 es_ES
dc.identifier.issn 0378-3774 es_ES
dc.identifier.uri http://hdl.handle.net/10251/202819
dc.description.abstract [EN] Five different methods of determining sap flow (SF), three based on heat pulse (compensation heat pulse, New Zealand-cHP-NZ; compensation heat pulse, Greenspan/Australia-cHP-G (South oriented), and cHP-G-EW (East and West oriented, average); non-compensation heat pulse, Ariel/Israel-ncHP), one based on stem heat balance (Dynamax/USA-SHB), and another based on heat dissipation (Granier/France-HD) were compared in an experiment performed on peach trees in Northeast Spain. Two irrigation treatments (drip-irrigated) were applied: a control and a stress treatment, the latter consisting of withholding water from day 190 to 199. Between 1 and 3 different systems were installed in some trees of both, the control and stress treatments. All the techniques reflected the evolution of water stress in the stressed trees with a very similar tendency and in agreement with the evolution of predawn water potential (Psi p). Psi p correlated well with sap flow (SF) determined with all the systems (r(2) > 0.65) in the stress treatment, indicating that all the SF techniques detected changes in tree water status. The cHP-NZ system was the first to detect a SF reduction through the outer xylem vessels, as a response to water withholding. In control trees, daily SF rates provided by the three heat pulse and heat balance methods were well correlated with ETo and somewhat less with global radiation; all regressions improved on an hourly basis. Daily pattern and magnitude of mean SF rates monitored by the three heat pulse systems were quite similar in control trees. This was reflected by high regression coefficients when compared with each other. Higher SF rates recorded by ncHP methods in comparison with cHP-G and cHP-NZ might be attributed to technical limitations and to different sensor orientation. In an accompanying experiment, substantial differences between East and West location of the cHP-G sensors were observed, but when taking the mean value of those daily SF rates, differences between ncHP and cHP-G-EW were lower. Mean monthly crop coefficients, calculated by using SF data computed with ncHP method and soil evaporation as determined with microlysimeters, were 0.64 in July and 0.67 in August. SF systems can be used to detect plant water stress related to control, and might be useful for irrigation scheduling based on plant water status. The SF techniques analysed showed potential to better determine actual plant water necessities than other traditional methods, but a preceding calibration is needed. es_ES
dc.description.sponsorship The project was funded by the European Union (UC FAIR1- CT95-0030). T. A. Paco was supported by a post-doctoral fellowship provided by the Portuguese Foundation for Science and Technology. The authors would like to thank Isabel Ferreira for her comments and contribution with heat dissipation data. We also thank Maria Gasque and Elias Fereres for their aid and constructive, critical reading of the paper. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Agricultural Water Management es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Heat pulse es_ES
dc.subject Heat balance es_ES
dc.subject Heat dissipation es_ES
dc.subject Water deficit es_ES
dc.subject Tree water use es_ES
dc.subject.classification INGENIERIA AGROFORESTAL es_ES
dc.title Comparative assessment of five methods of determining sap flow in peach trees es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.agwat.2007.11.008 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/CICYT//HID96-1342-C04-04//RESPUESTA DE LOS ÁRBOLES FRUTALES AL RIEGO DEFICITARIO: UTILIZACIÓN DE INDICADORES BIOLÓGICOS PARA LA OPTIMIZACIÓN DEL RIEGO/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/INIA//SC93-059-06//RESPUESTA DE LOS CULTIVOS AL RIEGO DEFICITARIO Y DETERMINACIÓN DE SUS NECESIDADES HÍDRICAS/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/EUREF//FAIR1-CT95-0030//INNOVATIVE BIOLOGICAL INDICATORS TO IMPROVE THE EFFICIENCY OF WATER AND NITROGEN USE AND THE FRUIT QUALITY IN TREE CROPS/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural - Escola Tècnica Superior d'Enginyeria Agronòmica i del Medi Natural es_ES
dc.description.bibliographicCitation González Altozano, P.; Pavel, E.; Oncins, J.; Doltra, J.; Cohen, M.; Paço, T.; Massai, R.... (2008). Comparative assessment of five methods of determining sap flow in peach trees. Agricultural Water Management. 95(5):503-515. https://doi.org/10.1016/j.agwat.2007.11.008 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.agwat.2007.11.008 es_ES
dc.description.upvformatpinicio 503 es_ES
dc.description.upvformatpfin 515 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 95 es_ES
dc.description.issue 5 es_ES
dc.relation.pasarela S\34593 es_ES
dc.contributor.funder EUREF es_ES
dc.contributor.funder Instituto Nacional de Investigaciones Agrarias es_ES
dc.contributor.funder Comisión Interministerial de Ciencia y Tecnología es_ES


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