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Article

Irrigation of Young Olives Grown on Reclaimed Karst Soil Increases Fruit Size, Weight and Oil Yield and Balances the Sensory Oil Profile

1
Department of Applied Sciences, Institute for Adriatic Crops and Karst Reclamation, Put Duilova 11, 21000 Split, Croatia
2
Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 25, 10000 Zagreb, Croatia
3
Department of Soil Amelioration, University of Zagreb Faculty of Agriculture, Svetošimunska 25, 10000 Zagreb, Croatia
4
Department of Plant Sciences, Institute for Adriatic Crops and Karst Reclamation, Put Duilova 11, 21000 Split, Croatia
5
Center of Pomology, Croatian Agency for Agriculture and Food, Kralja Zvonimira 14a, 21210 Solin, Croatia
6
Department of Marine Studies, University of Split, R. Boškovića 37, 21000 Split, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Araceli Sanchez-Ortiz
Foods 2022, 11(18), 2923; https://doi.org/10.3390/foods11182923
Received: 17 August 2022 / Revised: 12 September 2022 / Accepted: 15 September 2022 / Published: 19 September 2022
The influence of different irrigation regimes on olive fruit morphological parameters and on the quantity and quality (marketable indices, phenolic content, fatty acid composition, and sensory profile) of virgin olive oil (VOO) obtained from the Croatian cultivar Oblica, grown on an extremely rocky and dry reclaimed karst soil, was studied over three years. Four treatments were applied: rain-fed and three treatments calculated as 50%, 75%, and 100% of the crop’s irrigation requirement (Irr). Principal component analysis separated growing seasons (GS) that differed in precipitation. In the 2016 season, which had a low number of fruits per kilogram and provided a higher amount of balanced VOO with medium to intense bitterness and pungency (rain-fed treatment), the oil yield increased by irrigation (Irr 75 and Irr 100) up to 18%, while unchanged phenolics, bitterness, and pungency were observed for the VOOs obtained. In the drier GS (2017), which under rain-fed conditions had high fruit per kg, smallest fruit sizes, and lowest oil yield, and in which the VOOs had high phenolic content and intense sensory taste attributes, fruit weight, fruit sizes, and oil yield increased by 35% in all irrigation treatments, while phenols, bitterness, and pungency decreased, balancing the sensory profile of the VOOs. The results obtained here led us to conclude that the irrigation of young olives resulted in a positive effect, with the indication that an abundant water supply is more effective in drought conditions. View Full-Text
Keywords: virgin olive oil; irrigation; young trees; sensory analyses; phenols; fatty acid profile virgin olive oil; irrigation; young trees; sensory analyses; phenols; fatty acid profile
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MDPI and ACS Style

Jukić Špika, M.; Romić, D.; Žanetić, M.; Zovko, M.; Klepo, T.; Strikić, F.; Perica, S. Irrigation of Young Olives Grown on Reclaimed Karst Soil Increases Fruit Size, Weight and Oil Yield and Balances the Sensory Oil Profile. Foods 2022, 11, 2923. https://doi.org/10.3390/foods11182923

AMA Style

Jukić Špika M, Romić D, Žanetić M, Zovko M, Klepo T, Strikić F, Perica S. Irrigation of Young Olives Grown on Reclaimed Karst Soil Increases Fruit Size, Weight and Oil Yield and Balances the Sensory Oil Profile. Foods. 2022; 11(18):2923. https://doi.org/10.3390/foods11182923

Chicago/Turabian Style

Jukić Špika, Maja, Davor Romić, Mirella Žanetić, Monika Zovko, Tatjana Klepo, Frane Strikić, and Slavko Perica. 2022. "Irrigation of Young Olives Grown on Reclaimed Karst Soil Increases Fruit Size, Weight and Oil Yield and Balances the Sensory Oil Profile" Foods 11, no. 18: 2923. https://doi.org/10.3390/foods11182923

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