ISHS Acta Horticulturae 474: III International Symposium on Olive Growing
EFFECT OF REGULATED DEFICIT IRRIGATION IN OLIVE OIL PRODUCTION AND QUALITY |
| Authors: | M.J. Motilva, M.P. Romero, S. Alegre, J. Girona |
| Keywords: | olive, irrigation deficit, quality |
| Abstract:
Four irrigation treatments were applied during 1996 in a commercial olive plot (Olea europaea L. cv. “Arbequina”) located in the Mediterranean region of “Les Garrigues” (Lleida. Spain). The Control treatment was irrigated at 100% Etc (estimated crop evapotranspiration) during the whole season. Additionally three RDI (regulated deficitary irrigation) treatments were applied between the beginning of massive pit hardening (5 July for 1996 season) and the third week of September, at 75%, 50% and 25% of Etc (RDI-25%, RDI-50% and RDI-75%, respectively). The effect of irrigation treatment in maturity index, oil content, moisture, oil production, titratable acidity, peroxide value, total polyphenol and stability was determined. Maturity index increased with time, but olives from RDI-25 % are the most advanced. Oil and moisture content in olives didn't differ between irrigation treatments. Oil production increased with decreased water supply, RDI-25 % showed the highest production. Irrigation treatments may have an effect on oil composition. Total polyphenols and stability increased in olive oil from RDI-25 %. No differences in acidity and peroxide value were observed. | |
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