Effect of Olive-Nutri-Vant on Yield and Quality of Olives and Oil

Wiesman, Zeev; Ronen, Adi; Ankarion, Y.; Novikov, Volodymyr; Maranz, Steven J.; Chpagain, B.; Abramovich, Z.

doi:10.17660/actahortic.2002.594.74

Cited by 13 publications

(6 citation statements)

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“…Fatty acid composition is a quality parameter and authenticity indicator of virgin olive oils. In general, it is insensitive to fertilisation, as shown by Wiesman et al ., who reported that foliar application of a nutrient mixture (nitrogen, phosphorus, potassium and boron) had no significant effects on the fatty acid profile of olive oil. Our results showed that fertilisation with the two tested treatments did not cause significant variations in the fatty acid profile of Picholine oil, with the exception of the increase in linolenic acid caused by T1 treatment.…”

Section: Discussionsupporting

confidence: 80%

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

et al. 2013

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Section: Discussionsupporting

confidence: 80%

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

et al. 2013

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“…Fatty acid composition was not strongly affected by the nutrient-based fertilization especially during the first crop season. These results are in accordance with those reported by Wiesman et al (2002) and Tekaya et al (2012), who showed that foliar application of nutrient mixture (nitrogen, phosphorus, potassium and boron) had no significant effects on the fatty acid profile of olive oil. It is important to mention that during the second crop season, the FFA were more sensitive to fertilization.…”

Section: Discussionsupporting

confidence: 93%

Olive oil quality influenced by biostimulant foliar fertilizers

Zouari¹,

Mechri²,

Tekaya³

et al. 2020

Braz. J. Biol. Sci.

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Foliar fertilization has been used as an important tool to meet the tree nutrient demand and to be an environmental beneficial with the use of little quantities. Actually modern fruit trees physiology is focused on the stimulation of plant cell development and fruit production using biostimulants. In olive trees, few products have been used for improving oil quality. For this purpose, two biostimulants products have been tested and used simple or combined with a third product rich in nitrogen. The treatments were classified to: T1 (rich in nitrogen) and biostimulants treatments as following T2 (combination of boron, magnesium, sulfur and manganese associated with seaweed) TNi (biostimulant combining a protein extract with a calcium base), T12 (combined application of T1 and T2) and finally T12Ni (combined application of T1, T2 and TNi) with a control treatment CON (without foliar fertilization). All these foliar nutrients were sprayed during two successive years on trees issued of Chemlali cultivar cultivated in rain-fed conditions of central Tunisia. Biochemical parameters of the olive oil, like physiochemical characteristics, fatty acid profile total polyphenols, ortho-diphenols, chlorophyllic and carotenoids pigments were analyzed annually after the application of these foliar compounds. All the olive oils issued from the treatments were classified as extra virgin and the physiochemical parameters were sensitive to foliar fertilization except for some parameters. Quantitative changes were observed in the pool of the fatty acids composition and the treatment TNi (rich in calcium) increased significantly the percentage of the monounsaturated fatty acid (MUFA) C18:1 as well as the ratios C18:1/C18:2 and MUFA/polyunsaturated fatty acids (PUFA) during the first year of experimentation. This treatment induced also an increase in the total polyphenols concentration. An annual variation between treatments has been observed according the polyphenols concentration and othodiphenols which can be influenced by climatic conditions principally in rain-fed conditions. This study highlighted the effect of the nutrient availability cumulated after two years of foliar application on the olive oil quality.

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“…The results of fruit oil content came in line with those of Wiesman et al (2002) who found that spraying olive trees with a compound containing: nirogen and potassium(Olive-Nutri-Vant ) increased fruit oil content. El-Sharkawy (2003) found that spraying olive trees with urea increased oil percentage in olive fruits; Desouky et al (2009) found that spraying three cultivars of olive with calcium chloride increased fruit oil content and improved oil quality and Hegazi et al (2011) found that spraying olive trees with nitrogen or potassium increased fruit oil content.…”

Section: Fruit Oil Percentage/ Dry Weightsupporting

confidence: 86%

Effect of Some Foliar Application Nutrient Sprays on the Productivity and Fruit Quality of Kalamata Olive Cultivar

El-Sharkawy

Osman

Mikhail

2014

Egyptian Journal of Agricultural Sciences

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This investigation was carried out during 2012 and 2013 seasons on 6 year old olive trees cv. Kalamata . Selected trees were planted at 6 x 4 meters apart in a sandy soil; subjected to drip irrigation; uniform in shape and size as much as possible and received regularly the recommended horticultural practices according to the recommendations of the Horticulture Research Institute. Kalamata olive trees were foliar sprayed with calcium chloride at 1 or 2%; potassium chloride at 2 or 4%, and urea at 2 % each alone or in combination at full bloom. Obtained data indicated that all tested treatments increased fruit set, the number of fruits per tree, yield (kilogram per tree) and improved fruit quality (fruit weight, fruit dimensions flesh/pit ratio and oil content) while, decreased both June and pre-harvest drop in comparison with the control. In addition to improve NPK status of Kalamata olive leaves.The most effective treatments on tree fruiting were the combinations of 2 and 4 % potassium chloride with 2 % urea. Regarding, fruit quality, the two concentrations of calcium chloride or potassium chloride alone or supplemented with 2% urea, improved fruit quality. Besides, 2 or 4% potassium chloride induced the highest values of fruit oil percentage as fruit fresh weight, while as dry weight, the treatment of 1% calcium chloride associated with 2% urea induced the highest values. Regarding leaf NPK content, the treatment of 2% calcium chloride increased leaf nitrogen content in the first season, while, treatment of 2% potassium chloride + 2 %urea was the most effective treatment in the second season. Either 2 % or 4 % potassium chloride treatments increased leaf P content during 2012 & 2013 seasons, whereas leaf K content was not affected with the tested treatments in the first season, while in second season the treatment of 1 % calcium chloride was the most effective treatment. This study recommended that spraying olive trees cv. Kalamata with 1 % or 2 % calcium chloride; 2 or 4 % potassium chloride and 2 % urea, each alone or in combination, at full bloom increased tree fruiting; improved fruit quality and increased fruit oil content.

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Effect of Olive-Nutri-Vant on Yield and Quality of Olives and Oil

Cited by 13 publications

References 0 publications

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

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

Olive oil quality influenced by biostimulant foliar fertilizers

Effect of Some Foliar Application Nutrient Sprays on the Productivity and Fruit Quality of Kalamata Olive Cultivar

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