Effects of dietary free fatty-acid content and saturation degree on lipid-class composition and fatty-acid digestibility along the gastrointestinal tract in broiler starter chickens
Rodriguez-Sanchez, Raquel (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Tres, A. (Universitat de Barcelona. Departament de Ciències de l'Alimentació i Gastronomia)
Sala Pallarés, Roser (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Garcés-Narro, Carlos (Universidad CEU Cardenal Herrera. Departamento de Producción y Sanidad Animal)
Guardiola Ibarz, Francesc (Universitat de Barcelona. Departament de Ciències de l'Alimentació i Gastronomia)
Gasa, Josep (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Barroeta, Ana Cristina (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Fecha:	2019
Resumen:	The aim of the present study is to assess the effect of the dietary free fatty acid (FFA) content and dietary fat saturation degree on the fatty-acid (FA) digestibility and lipid-class content along the gastrointestinal tract and excreta in broiler chickens. The 8 experimental diets resulted from replacing crude soybean oil with soybean acid oil from chemical refining, or crude palm oil with palm FA distillate from physical refining. Thus, there were 4 soybean and 4 palm diets with 6% added fat varying in their FFA% (5, 15, 35, and 50%). Samples of digestive content (gizzard, duodenum, jejunum, and ileum) and excreta were collected at 14 D for the determination of the FA digestibility and lipid-class content. The total FA digestibility coefficients reported for the chickens fed S diets in the jejunum, ileum, and excreta were higher than for those fed P diets (P ≤ 0. 02). The general greater digestibility of the unsaturated diets was mainly explained by a higher contribution of the ileum to the absorption of saturated FA. The dietary FFA content mainly affected the FA absorption process. The diets with 50% FFA presented lower saturated FA digestibility coefficients in the jejunum and ileum (P ≤ 0. 03), and higher content of FFA in the ileum and excreta (P ≤ 0. 014), in comparison to the diets with 5% FFA. The 15% FFA diets were not different from the 5% FFA diets, regarding the saturated FA digestibility in the jejunum and excreta, and the FFA content in the ileum and excreta. It was concluded that unsaturated diets with moderate content of dietary FFA (up to 15%) could be used in broiler-chicken starter diets, as they led to similar FA absorption and performance results to the diets with the lowest dietary FFA content. From the present study, it has also been concluded that dietary saturated FA content has a greater impact on FA absorption than the dietary FFA content has.
Ayudas:	Ministerio de Economía y Competitividad AGL2015-64431-C2-1-R Ministerio de Economía y Competitividad FPU/06063
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Avicultura ; Pollastres
Publicado en:	Poultry Science, Vol. 98 Núm. 10 (january 2019) , p. 4929-4941, ISSN 1525-3171

DOI: 10.3382/ps/pez253
PMID: 31111950

13 p, 1.5 MB

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