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Scheduling a deficit irrigation strategy from leaf turgor measurements: impact on water status, gas exchange and oil yield

AuthorsPadilla Díaz, C. M. ; Rodríguez Domínguez, Celia M. ; Pérez Martín, Alfonso ; Montero de Espinosa, Antonio ; García Martos, José M. ; Fernández Luque, José Enrique
KeywordsIrrigation scheduling
Stem water potential
Stomatal conductance
Water productivity
Crop coefficient
Leaf patch pressure probe
Issue Date15-May-2018
PublisherInternational Society for Horticultural Science
CitationActa Horticulturae 1119: 267-272 (2018)
AbstractRegulated deficit irrigation (RDI) is among the most promising irrigation strategies for super-high-density (SHD) olive orchards, and plant-based sensors to monitor water stress are useful tools to manage RDI. In this study, we evaluated the suitability of leaf turgor-related measurements, made with ZIM probes, to schedule an RDI strategy aimed to supply 45% of the irrigation needs to an 'Arbequina' olive orchard with 1667 trees ha-1 (45RDITP treatment). For comparison, we used a similar treatment but in which irrigation was scheduled with the crop coefficient approach (45RDICC). In addition, we had a full irrigation (FI) treatment aimed to replace 100% of the irrigation needs (IN). We assessed the effect of both 45RDITP and 45RDICC on water status, stomatal conductance and net photosynthesis, as well as on water productivity for oil yield. There were no differences between 45RDICC and 45RDITP in any of the evaluated variables. We concluded that our irrigation approach based on the use of ZIM probes is useful to schedule RDI in SHD olive orchards, and that it is a suitable alternative to the crop coefficient approach, at least in those orchards for which crop coefficient values are unknown.
Description6 páginas.-- 15 referencias.-- Comunicación presentada en el VIII International Olive Symposium. Split, (Croatia), October 10-14, 2016
Publisher version (URL)http://dx.doi.org/10.17660/ActaHortic.2018.1199.41
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