| Title: | Virgin olive oil quality of hedgerow 'Arbequina' olive trees under deficit irrigation |
| Author(s): | Garcia JM; Morales-Sillero A; Perez-Rubio AG; Diaz-Espejo A; Montero A; Fernandez JE; |
| Address: | "Instituto de la Grasa (IG-CSIC) Campus Universidad Pablo de Olavide, Edificio 46, Carretera Sevilla-Utrera km 1, 41013 Sevilla, Spain. Departamento de Ciencias Agroforestales, ETSIA, Universidad de Sevilla, Carretera de Utrera km 1, 41013 Sevilla, Spain. Instituto de Recursos Naturales y Agrobiologia (IRNAS, CSIC), Avenida de Reina Mercedes, n. 10, 41012 Sevilla, Spain" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| 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(-1) ) under a full irrigation (FI) treatment (470.1 mm year(-1) 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. 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. 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. (c) 2016 Society of Chemical Industry" |
| Keywords: | "Agricultural Irrigation/*methods Aldehydes/analysis/metabolism Antioxidants/analysis/metabolism Conservation of Natural Resources Crop Production Crops, Agricultural/chemistry/growth & development/metabolism European Union *Food Quality Fruit/*chemistry/*;" |
| Notes: | "MedlineGarcia, Jose M Morales-Sillero, Ana Perez-Rubio, Ana G Diaz-Espejo, Antonio Montero, Antonio Fernandez, Jose E eng Comparative Study England 2016/06/02 J Sci Food Agric. 2017 Feb; 97(3):1018-1026. doi: 10.1002/jsfa.7828. Epub 2016 Jun 21" |
