Influence of organic fertilization and irrigation on quality of maraqi cultivar virgin olive oil [electronic resource].

Includes references.

This study was carried out through season (2010-2011) on Maraqi cv. trees, 7 years old, in organic farm at Barqash, Giza governorate, Egypt. The investigation aimed to study Influence of organic fertilization and irrigation on quality of Maraqi cultivar virgin olive oil. The following treatments were applied: T1 : (100% Poultry manure + 75% irrigation), T2(75% Poultry manure+ 75% irrigation), T3(100% compost + 75% irrigation), T4(75% compost + + 75% irrigation), T5 (humic acid + 75% irrigation), T6 (Farm yard manure (FYM) + 75% irrigation), T7 (100% Poultry manure + 100% irrigation), T8 (75% Poultry manure + 100% irrigation), T9 (100% compost + 100% irrigation), TlO (75% compost + 100% irrigation), Tl1 (humic acid + 100% irrigation) and T12 (Farm yard manure (FYM) + 100% irrigation). Results of this study indicated that all organic c.v Maraqi VOOs were classified as extra virgin . olive oil. VOOs obtained from Farm yard manure and compost had the highest phenols and oxidative stability. N content in used organic fertilizers had reverse (negative) relationship on content of phenols. On the contrary, Organic matter had positive relationship on content of phenols. VOOs obtained from75% irrigation had higher total phenol content and higher oxidative stability than that treatment with100% irrigation. In the case of (Organic fertilization + 75% irrigatio~, monounsaturated fatty acids increased as the fertilizer dose increased. On the contrary, the content of polyunsaturated fatty acids decreased with it. In particular, the oleic acid content increased, and linoleic fatty acid content decreased with fertilizer dose increased. The monounsaturated/polyunsaturated fatty acid ratio increased as the fertilizer dose increased.

Summary in Arabic.

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