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dc.creatorCorell González, Mireia
dc.creatorMartín Palomo, María José
dc.creatorGalindo Egea, A.
dc.creatorTorrecillas Melendreras, Arturo
dc.creatorMoreno Lucas, Félix
dc.creatorMoriana Elvira, Alfonso
dc.creatorGirón Moreno, Ignacio Francisco
dc.date.accessioned2015-12-22T18:38:33Z
dc.date.available2015-12-22T18:38:33Z
dc.date.issued2015
dc.identifier.issn0378-3774es
dc.identifier.urihttp://hdl.handle.net/11441/32151
dc.descriptionPreprintes
dc.description.abstractRegulated deficit irrigation (RDI) results are affected by the actual water stress level reached during the treatments. The irrigation scheduling based on water status measurements, such as trunk diameter fluctuations, can control in an accurate way the water restrictions. However, the number of works that use these indicators as isolate parameter to control the schedule is scarce in general, and very scarce in olive trees. Building on previous works, the aim of this article is to schedule an RDI strategy in olive trees based on threshold values of maximum daily shrinkage (MDS) and trunk growth rate (TGR) without reference trees. The experiment was performed in a 40 years-old table olive orchard (cv Manzanillo) in Seville (Spain) for 3 years (seasons from 2011 to 2013). Three different irrigation treatments were considered in a completely randomized block design. Control trees were over-irrigated (125% crop evapotranspiration, ETc) in order to obtain fully irrigated conditions. Water stress conditions were applied during Phase II (pit hardening) in the RDI-2 treatment or during Phase II and Phase I (full bloom) in RDI-12. In both RDIs, a treatment recovery (Phase III) was performed before harvest. The trunk diameter fluctuation indicator was selected according to the phenological stage. TGR was used in conditions of full irrigation or moderate water stress level, such as Phase I and Phase III. TGR threshold values based on previous works were selected: 20 mday−1, RDI-2; 10 mday−1, RDI-12 (Phase I) and −5 mday−1, both treatments, Phase III. Only in one season RDI-2 was scheduled with TGR values (−10 mday−1) during Phase II. MDS threshold values were determined as the ratio between measured MDS and fully irrigated MDS (the so called MDS signal). The latter was estimated from a baseline. During Phase II, RDI-2 was irrigated with a threshold value of 0.9, while RDI-12 was irrigated with a threshold value of 0.75. MDS signal was not useful for most of the period considered and it did not agree well with fruit drop or fruit size. Conversely, the average of TGR during Phase II was significantly linked to fruit drop and fruit size, and so were the midday stem water potential and stress integral. Recommendations about the management of TGR are discussed. The water stress level in the experiments was moderate and no significant differences in yield were found. However, the trend of yield reduction in RDI-12 was likely related with a fruit drop and a reduction in crown volume. The yield quality did not decrease in the RDIs treatments, on the contrary, pulp:stone ratio improved significantly in some of the seasons.es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherElsevieres
dc.relation.ispartofAgricultural Water Management 161, 114–126es
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectMDSes
dc.subjectStress integrales
dc.subjectTGRes
dc.subjectWater potentiales
dc.subjectWater relationses
dc.titleFeasibility of trunk diameter fluctuations in the scheduling of regulated deficit irrigation for table olive trees without reference treeses
dc.typeinfo:eu-repo/semantics/articlees
dc.type.versioninfo:eu-repo/semantics/submittedVersiones
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Ciencias Agroforestaleses
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.agwat.2015.07.014es
dc.identifier.doi10.1016/j.agwat.2015.07.014es
dc.identifier.idushttps://idus.us.es/xmlui/handle/11441/32151

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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as: Attribution-NonCommercial-NoDerivatives 4.0 Internacional