A fruit growth approach to estimate oil content in olives

López-Bernal, Álvaro; Fernandes-Silva, Anabela; Vega, V.; Hidalgo, J.; León, Lorenzo; Testi, Luca; Villalobos, Francisco J.

doi:10.1016/j.eja.2020.126206

Cited by 12 publications

(9 citation statements)

References 34 publications

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“…In moderate water-stress conditions, yield reductions would be almost null, even more if autumn rainfall is expected before harvest . Moreover, oil accumulation may not be affected by water stress during this period [56]. Although other studies suggest that, before harvest, oil accumulation could be reduced due to moderate water stress [55], such conditions could be reduced for autumn rains.…”

Section: Discussionmentioning

confidence: 85%

The Sustainability of Irrigation Strategies in Traditional Olive Orchards

2021

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Olive trees are one of the few alternative crops available for farmers in arid environments. In many of these regions, surface irrigation is increasing. The aim of this study was to estimate the pattern of water soil reserves through the season considering different climatic scenarios, limitations in irrigation scheduling, and irrigation systems. Modeling was performed with the most common type of soil, and a tree density of 10 × 10 m was used. Three different climatic scenarios were estimated using eighteen agroclimatic stations along the zone (Jaén, Spain). In these climatic scenarios, different irrigation strategies were considered. First, the percentages of maximum flow available (100%, 50%, and 33%) were used. In each of these flows, the days available for irrigation were considered: daily irrigation (IDD), 20 days per month (ID20), and no irrigation, during August (RDI). The results suggest that a 33% flow strategy, the most common in the surveyed area, would produce the greatest water-stress period in the most sensitive phenological stage. However, 100%, in all scenarios, and 50% (only IDD and RDI) would obtain the best water status. According to the estimated water applied, 50% was the most advisable strategy. However, in a minimum rainfall scenario, water needs could be excessive.

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Section: Discussionmentioning

confidence: 85%

The Sustainability of Irrigation Strategies in Traditional Olive Orchards

2021

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“…Pit hardening is considered a critical phase of olive fruit development that usually corresponds to the end of the first phase of fruit growth, which is characterized by intense cell division and the sinking of assimilates in endocarp tissues [ 48 ]. This indicates the beginning of oil accumulation in the fruit [ 49 ]. Forecasting the pit hardening date is a useful tool for irrigation management [ 50 ], the application of phytosanitary products [ 51 ], the further estimation of the peak of oil accumulation, and the determination of the optimal harvest period [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Modeling Phenological Phases across Olive Cultivars in the Mediterranean

Didevarasl,

Costa Saura,

Spano

et al. 2023

Plants

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Modeling phenological phases in a Mediterranean environment often implies tangible challenges to reconstructing regional trends over heterogenous areas using limited and scattered observations. The present investigation aimed to project phenological phases (i.e., sprouting, blooming, and pit hardening) for early and mid–late olive cultivars in the Mediterranean, comparing two phenological modeling approaches. Phenoflex is a rather integrated but data-demanding model, while a combined model of chill and anti-chill days and growing degree days (CAC_GDD) offers a more parsimonious and general approach in terms of data requirements for parameterization. We gathered phenological observations from nine experimental sites in Italy and temperature timeseries from the European Centre for Medium-Range Weather Forecasts, Reanalysis v5. The best performances of the CAC_GDD (RMSE: 4 days) and PhenoFlex models (RMSE: 5–9.5 days) were identified for the blooming and sprouting phases of mid–late cultivars, respectively. The CAC_GDD model was better suited to our experimental conditions for projecting pit hardening and blooming dates (correlation: 0.80 and 0.70, normalized RMSE: 0.6 and 0.8, normalized standard deviation: 0.9 and 1.0). The optimization of the principal parameters confirmed that the mid–late cultivars were more adaptable to thermal variability. The spatial distribution illustrated the near synchrony of blooming dates between the early and mid–late cultivars compared to other phases.

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“…Oil accumulation in olive fruits is known to begin in June and to last until mid-October. It then slows down during November-December [4,64]. The total period of drupe development from flowering until maturation lasts 18-20 weeks.…”

Section: Oil Accumulation Under Warmer Summersmentioning

confidence: 98%

Elevated Temperatures Negatively Affect Olive Productive Cycle and Oil Quality

et al. 2021

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Climate change, with elevated temperatures throughout the year, affects many stages of the reproductive growth and development of olives as well as oil quality at harvest. Although olive (Olea europaea L.) is well adapted to the environmental conditions of the Mediterranean Basin, agricultural techniques and breeding through selection programs will have to adapt to these climate change, threatening to worsen in the near future. Defining the pathways controlling high fruit productivity and oil quantity and quality, despite elevated temperatures and sub-optimal growing conditions, is important for coping with current and predicted climate changes. As breeding programs aiming to address these crucial changes may take several decades, an urgent need to designate specific olive cultivars that are more resistant to high temperatures emerges.

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A fruit growth approach to estimate oil content in olives

Cited by 12 publications

References 34 publications

The Sustainability of Irrigation Strategies in Traditional Olive Orchards

The Sustainability of Irrigation Strategies in Traditional Olive Orchards

Modeling Phenological Phases across Olive Cultivars in the Mediterranean

Elevated Temperatures Negatively Affect Olive Productive Cycle and Oil Quality

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