English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/16842
Title: Evaluation of sap flow and trunk diameter sensors for irrigation scheduling in early maturing peach trees
Authors: Conejero Puente, Wenceslao; Alarcón Cabañero, Juan José; García-Orellana, Y.; Nicolás Nicolás, Emilio; Torrecillas Melendreras, Arturo
Keywords: Stem water potential
trunk diameter fluctuations
Water relations
Issue Date: Dec-2007
Publisher: Oxford University Press
Citation: Tree Physiology 27(12):1753-1759 (2007)
Abstract: Five-year-old early maturing peach trees (Prunus persica (L.) Batsch cv. Flordastar grafted on GF-677 peach rootstock) were subjected to three irrigation treatments from March 18 to November 10, 2006. Control plants (T0 treatment) which received irrigation in excess of their crop water requirements (1089.7 mm) were compared with plants watered according to sap flow (SF; T1 treatment) or maximum daily trunk shrinkage (MDS; T2 treatment) measurements, so as to maintain SF and MDS signal intensities (control SF/SF in T1 and MDS in T2/control MDS, respectively) close to unity. When SF or MDS signal intensity on at least two of three consecutive days was at or below unity, irrigation was reduced by 10%. When the MDS signal intensity on at least two of three consecutive days exceeded unity, irrigation was increased by 10%. During the experiment, estimated crop evapotranspiration was 704.9 mm, and the cumulative amounts of applied water in the T1 and T2 treatments were 463.2 and 654.5 mm, respectively. The MDS-signal-intensity-driven irrigation schedule was more suitable than the SF-signal-intensity-driven irrigation schedule because it was more sensitive and reliable in detecting changes in plant water status, preventing the development of detectable plant water stress. Moreover, it had no effect on fruit size. We conclude that peach tree irrigation scheduling can be based on MDS measurements alone. Changes in the irrigation protocol assayed were proposed to reduce MDS signal intensity deviations above unity, for example, by increasing the irrigation scheduling frequency or the amount of water applied, or both. Irrigation schedules based on maintaining MDS signal intensities close to unity could be applied when local crop factor values are unavailable.
Publisher version (URL): http://dx.doi.org/10.1093/treephys/27.12.1753
URI: http://hdl.handle.net/10261/16842
DOI: 10.1093/treephys/27.12.1753
ISSN: 1758-4469 (Online)
0829-318X (Print)
Appears in Collections:(CEBAS) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.