Ali Karabayir, Mustafa Öğütcü, Ümit Acar, Nazan Arifoglu


In food industry, citrus peels are emerging as waste during processing of the fruits to juice or canned food. Thus, significant amounts of citrus peels are obtained each year all over the world. The aim of this study was to investigate the effects of orange peel oil on quail growth-performance, egg quality and blood parameters. First, essential oil was extracted from orange peel and then different amounts of essential oil (200, 400 and 600 ppm) were mixed with quail feed. Essential oil-containing and essential oil-free feeds were individually supplied to 3-5 day aged 36 quails during 9 weeks. Growth performance parameters, egg weight, shell thickness, shell strength, Haugh Units and some blood parameters of the quails were determined. The gas chromatography results revealed that limonene was the main volatile, aromatic and bioactive component of orange peel essential oil. Orange peel essential oil addition did not significantly affect growth performance of the quails. Moreover, essential oil addition influenced egg weight, b* values of yolk and a* values of albumen. Additionally, supplementation of 600 ppm essential oil increased monounsaturated fatty acids ratio and reduced the total saturated fatty acids ratio. In terms of blood parameters, essential oil addition affected quail blood parameters such as GLC, ALP, GOT, GPT, LDH values, while ALB, TPROT, CH and TG values of the quails were not affected. In conclusion, orange peel oil may be used as valuable alternative natural additive for poultry feed.


essential oil, limonene, egg quality, blood parameters, quail, feed.

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