Effect of nutrient‐based fertilisers of olive trees on olive oil quality

Abstract

The results of this study extend the current knowledge of such cross-talk between plant nutrition and quality of oil.

Analytical Evaluation and Antioxidant Properties of Some Secondary Metabolites in Northern Italian Mono- and Multi-Varietal Extra Virgin Olive Oils (EVOOs) from Early and Late Harvested Olives

“…This could be explained by the organic farming that is known to positively influence the content of total phenols in the olives as a response to biotic and abiotic stressors while seems to no influence other parameters such as the content of α-tocopherol, as confirmed by our data and others reported in literature [16]. Furthermore, the positive influence of the organic farming is endorsed by the calculated maturity index shown in Table 3.…”

“…Overall, EVOO phenolic content is influenced by a range of factors, including: cultivar, pedo-climatic conditions, organic or non-organic cultivation, level of maturation of the drupe at harvest time (early or late harvest), and technology employed in the oil production process. For example, following foliar fertilization no effects were found on either general physico-chemical characteristics or fatty acid composition but a significant decrease in both polyphenol and o -diphenol contents was detected [16]. There is a wealth of studies on the influence of irrigation, cultivar, and soil properties on the nutraceutical components and organoleptic properties of EVOO, particularly as regards tocopherols, phenolic fraction, oleic and linoleic acid contents, stability, and sensorial characteristics [5,17].…”

Effects of nitrogen fertilization and nitrification inhibitor product on vegetative growth, production and oil quality in ‘Arbequina’ hedgerow and ‘Picual’ vase-trained orchards

“…Treatments with N did not produce significant differences in free acidity, peroxide value, K 232 and K 270 in 'Arbequina' or 'Picual' olive oil (data not shown). This result is in accordance with Tekaya et al (2013), who demonstrated that nutrient-based fertilization did not influence these quality indices for olive oil.…”

Influence of agroclimatic parameters on phenolic and volatile compounds of Chilean virgin olive oils and characterization based on geographical origin, cultivar and ripening stage

“…The agronomic practice of fertilization is of particular interest in olive production because fertilization programs of both macro‐ and micro‐nutrients influence the sources of assimilation for oil formation in olive trees . Some of these nutrients are involved in photosynthesis, nitrogen fixation, respiration, changes in the oil content and the profile of phenols . In fact, some studies have reported that foliar fertilization can modify the quality and chemical composition of olives and influence the quality of virgin olive oil (VOO) .…”

“…5 Some of these nutrients are involved in photosynthesis, nitrogen fixation, respiration, changes in the oil content 6 and the profile of phenols. 7 In fact, some studies have reported that foliar fertilization can modify the quality and chemical composition of olives 8 and influence the quality of virgin olive oil (VOO). 9 Soil elements also contribute to changes in the concentration of phenols 10 and volatiles.…”