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Influence of free fatty acid content and degree of fat saturation in laying hen diets on egg quality, yolk fatty acid profile, and cholesterol content


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Title: Influence of free fatty acid content and degree of fat saturation in laying hen diets on egg quality, yolk fatty acid profile, and cholesterol content
Authors : Palomar Lloris, María
Soler Sanchis, María Dolores
Tres, A.
Barroeta Lajusticia, Ana Cristina
Muñoz Núñez, María
Garcés Narro, Carlos
Keywords: Alimentos para animales.Gallinas ponedoras - Alimentación.Feeds - Composition.Ácidos grasos.Eggs - Quality control.Huevos - Control de calidad.Piensos compuestos.Hens - Feeding and feeds.Animal feeds.Fatty acids.
Publisher: Elsevier
Citation: Palomar, M., Soler, M.D., Tres, A., Barroeta, A.C., Muñoz-Núñez, M. & Garcés-Narro, C. (2023). Influence of free fatty acid content and degree of fat saturation in laying hen diets on egg quality, yolk fatty acid profile, and cholesterol content. Poultry Science, vol. 102, i. 1 (jan.), art. 102236. DOI: https://doi.org/10.1016/j.psj.2022.102236
Abstract: The aim of the present study was to evaluate the effect of dietary free fatty acid (FFA) content and the degree of saturation on egg quality, yolk fatty acid (FA) profile, and yolk cholesterol content. For a 15-wk period, a total of 144 laying hens (19- wk-old) were randomly assigned to 8 treatments arranged in a 2 £ 4 factorial design, with 2 sources of crude oil (soybean oil and palm oil) and 4 levels of FFA (10, 20, 30, and 45%). The dietary treatments were achieved by progressively substituting the original oils with equivalent amounts of their corresponding acid oils (soybean acid oil and palm fatty acid distillate, respectively). No differences in ADFI or egg mass were found. However, dietary FFA reduced egg production (linear, P < 0.05) and increased the feed conversion ratio (linear, P < 0.05). Higher levels of FFA in soybean diets resulted in higher egg weight with higher albumen and yolk weights (linear, P < 0.01). Palm diets presented higher yolk:albumen ratio than soybean diets (P < 0.001), but the effect of FFA did not follow a linear trend. Hens fed soybean diets laid eggs with higher Haugh units (HU) than palm diets (P < 0.001), although increasing the dietary FFA% reduced the HU values in both (linear, P < 0.001). Palm diets enhanced shell quality with greater resistance to breakage, and higher dry matter and ash content than soybean diets (P < 0.05). No differences in egg chemical composition and yolk cholesterol content were found (P > 0.05). The saturation degree had a significant effect on all the analyzed yolk FA (P < 0.001) except for arachidonic acid (C20:4 n-6), whereas increasing the FFA content did not affect to a great extent. These results show that varying dietary FFA level did not affect egg quality and yolk composition as much as the dietary fat source did, supporting the use of acid oils and fatty acid distillates as fat ingredients for feed.
Description: Este artículo se encuentra disponible en la página web de la revista en la siguiente URL: https://www.sciencedirect.com/science/article/pii/S0032579122005326
URI: http://hdl.handle.net/10637/14166
Rights : http://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
ISSN: 0032-5791
1525-3171 (Electrónico)
Issue Date: 24-Jan-2023
Center : Universidad Cardenal Herrera-CEU
Appears in Collections:Dpto. Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos





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