Determining evapotranspiration in an olive orchard in southwest Spain
|Author/s||Torres Ruiz, José Manuel
Fernández Luque, José Enrique
Girón Moreno, Ignacio Francisco
Romero Vicente, Rafael
Jiménez Bocanegra, J.A.
García Tejero, Iván
Martín Palomo, María José
|Department||Universidad de Sevilla. Departamento de Ciencias Agroforestales|
|Abstract||The aim of this work was to evaluate, for an olive orchard in the Aljarafe county, the method developed by Orgaz et al. (2005) for determining the crop evapotranspiration (ETc). We compared the calculated ETc (ETc Orgaz) ...
The aim of this work was to evaluate, for an olive orchard in the Aljarafe county, the method developed by Orgaz et al. (2005) for determining the crop evapotranspiration (ETc). We compared the calculated ETc (ETc Orgaz) values with those determined by the crop coefficient approach (ETc crop coef), as described by Fernández et al. (2006), who used coefficient values previously calibrated for our orchard conditions. In addition, we compared the tree transpiration (Ep) values estimated with the mentioned Excel application (Ep Orgaz) with those simulated by a transpiration model (Ep sim) based on Penman-Monteith, validated for our orchard conditions. Results showed that the Excel application is a user-friendly tool valid for calculating reasonably accurate values of ETc from very few easy-to-measure inputs. The crop coefficient approach does not have this limitation, but years with unusual leaf area density may lead to errors on the calculated ETc. Ep sim is highly affected by variables difficult to measure in commercial orchards, such as the leaf area and the available soil water. In addition, processes related to leaf aging, soil temperature and recovery after drought are not include yet in the model, which affects the reliability of the Ep sim values at the end of the irrigation.
|Citation||Torres Ruiz, J.M., Fernández Luque, J.E., Girón Moreno, I.F., Romero Vicente, R., Jiménez Bocanegra, J.A., García Tejero, I. y Martín-Palomo García, M.J. (2012). Determining evapotranspiration in an olive orchard in southwest Spain. Acta Horticulturae, 2012 (949), 251-258.|