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Víctor Beyá-Marshall,Julio Herrera,Thomas Fichet,Eduardo R. Trentacoste,Cristián Kremer 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.6
The intense drought aff ecting olive production in Northern Chile underscores the need to research non-traditional irrigationstrategies to obtain the best crop performance. Accordingly, this study aimed to obtain preliminary data to guide futureresearch on this topic. Diff erent water replenishment levels on crop evapotranspiration (ET c ; 13.5, 27.0, 40.5, and 54%)were established in a young orchard, cv. Arbequina, from the end of fruit drop (EFD) to full bloom in the next season. Weevaluated the infl uence of plant water status (Ψ stem ) and crop load, considered as function of fruit number divided by trunkcross-sectional area, on reproductive and productive variables using multiple linear regressions. Our results show that cropload and Ψ stem measured from EFD to harvest affected yield components. Nevertheless, Ψ stem had the strongest infl uenceon fruit size, pulp development, oil accumulation, and yield. Oil content and yield were reduced by 54% and 50% for eachMPa, respectively, from Ψ stem EFD-H − 1.8 MPa, an effect that intensifi ed as crop load increased. During the period of fl owerdevelopment (September–November), the number of flowers per infl orescence and percentage of perfect flowers were reducedwhen Ψ stem was less than − 2.0 MPa. These preliminary results showed that bud differentiation, infl orescence and flowerformation are highly sensitive to water deficit. The intense drought aff ecting olive production in Northern Chile underscores the need to research non-traditional irrigationstrategies to obtain the best crop performance. Accordingly, this study aimed to obtain preliminary data to guide futureresearch on this topic. Diff erent water replenishment levels on crop evapotranspiration (ET c ; 13.5, 27.0, 40.5, and 54%)were established in a young orchard, cv. Arbequina, from the end of fruit drop (EFD) to full bloom in the next season. Weevaluated the infl uence of plant water status (Ψ stem ) and crop load, considered as function of fruit number divided by trunkcross-sectional area, on reproductive and productive variables using multiple linear regressions. Our results show that cropload and Ψ stem measured from EFD to harvest affected yield components. Nevertheless, Ψ stem had the strongest infl uenceon fruit size, pulp development, oil accumulation, and yield. Oil content and yield were reduced by 54% and 50% for eachMPa, respectively, from Ψ stem EFD-H − 1.8 MPa, an effect that intensifi ed as crop load increased. During the period of fl owerdevelopment (September–November), the number of flowers per infl orescence and percentage of perfect fl owers were reducedwhen Ψ stem was less than − 2.0 MPa. These preliminary results showed that bud differentiation, infl orescence and flower formation are highly sensitive to water deficit.
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