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ISHS Acta Horticulturae 889: VI International Symposium on Irrigation of Horticultural Crops

EFFECT OF THREE LEVELS OF WATER APPLICATION ON OIL YIELD AND QUALITY FOR AN OLIVE ('PICUAL') ORCHARD

Authors:   F. Flores, S. Ortega-Farias
Keywords:   Olea europea, regulated deficit irrigation, polyphenols, oil production, water use efficiency
DOI:   10.17660/ActaHortic.2011.889.38
Abstract:
An experiment was carried out to study the effect of three levels of water application on yield and oil quality for an olive (‘Picual’) orchard, located in the Pencahue Valley, Maule Region of Chile (35°23’ S; 71°44’ W), during the 2007-2008 growing season. The 8 year-old trees were irrigated by drip irrigation and trained on monocone training system with a planting density of 6×3 m. Levels of water application were: T1 = 100% of the actual evapotranspiration (ETa) between the beginning of massive pit hardening (MPH) and veraison (V); T2 = 60% between MPH and V; and T3 = 30% of ETa during pit hardening and 60% of ETa from the end of pit hardening to V. Fruit yield showed significant differences among treatments where T2 presented the highest yield (15.5 t ha-1). However, oil yield was not affected by the levels of water application. Oil yield varied between 2.3 t ha-1 and 2.5 t ha-1. Also, results indicate that there were not significant differences on oil content, acidity, peroxide number, K270, and K232. However, the total polyphenols for T2 and T3 were greater than those for T1.

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