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Virgin olive oil quality of hedgerow 'Arbequina' olive trees under deficit irrigation.
- Source :
-
Journal of the science of food and agriculture [J Sci Food Agric] 2017 Feb; Vol. 97 (3), pp. 1018-1026. Date of Electronic Publication: 2016 Jun 21. - Publication Year :
- 2017
-
Abstract
- Background: Regulated deficit irrigation (RDI) is used in hedgerow olive orchards to achieve a sustainable balance between water savings, tree vigor and oil production. Its effects on the presence of compounds responsible for the taste of the oil and its nutritional value are controversial. The present 3-year study was conducted in an 'Arbequina' orchard (1667 trees ha <superscript>-1</superscript> ) under a full irrigation (FI) treatment (470.1 mm year <superscript>-1</superscript> of water) and two RDI treatments scaled to replace 60% and 30%, respectively, of FI. The quality parameters, antioxidant contents and volatiles of the extracted virgin olive oil (VOO) were analyzed.<br />Results: In general, oils from the 30% RDI treatment had higher contents of pigments and phenolic compounds, a higher oleic/linoleic ratio and the highest oxidative stability, despite their lower tocopherol content. FI oils showed higher (E)-2-hexenal, 1-penten-3-one, ocimene, E-2-pentenal and pentene dimer contents than 30RDI oils, but lower contents of (E)-2-pentenol and volatile esters.<br />Conclusion: The results of the present study suggest that a RDI strategy supplying 30% of the total irrigation needs induces an increase in natural antioxidants in VOO. Neither yield, nor the rest of the quality parameters were affected by the reduced irrigation. However, abundant autumn precipitation can over-ride these effects of 30% RDI treatment on oil quality. © 2016 Society of Chemical Industry.<br /> (© 2016 Society of Chemical Industry.)
- Subjects :
- Aldehydes analysis
Aldehydes metabolism
Antioxidants analysis
Antioxidants metabolism
Conservation of Natural Resources
Crop Production
Crops, Agricultural chemistry
Crops, Agricultural growth & development
Crops, Agricultural metabolism
European Union
Fruit metabolism
Humans
Hydrogen-Ion Concentration
Nutritive Value
Olea metabolism
Olive Oil standards
Oxidation-Reduction
Pentanones analysis
Pentanones metabolism
Pigments, Biological analysis
Pigments, Biological biosynthesis
Spain
Tocopherols analysis
Tocopherols metabolism
Up-Regulation
Volatile Organic Compounds analysis
Volatile Organic Compounds metabolism
Agricultural Irrigation methods
Food Quality
Fruit chemistry
Fruit growth & development
Olea chemistry
Olea growth & development
Olive Oil analysis
Subjects
Details
- Language :
- English
- ISSN :
- 1097-0010
- Volume :
- 97
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Journal of the science of food and agriculture
- Publication Type :
- Academic Journal
- Accession number :
- 27247278
- Full Text :
- https://doi.org/10.1002/jsfa.7828