Efecto del nivel de fibra soluble y de la relación omega-6/omega-3 sobre los balances de nitrógeno y energía de conejos en cebo
- R. Delgado 1
- N. Nicodemus 1
- R. Abad Guamán 1
- D. Menoyo 1
- R. Carabaño 1
- J. García 1
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1
Universidad Politécnica de Madrid
info
- Javier Álvarez Rodríguez
- Begoña Panea Doblado
- Jorge Hugo Calvo Lacosta
- Mireia Blanco Alibés
- José Alfonso Abecia Martínez
- Daniel Villalba Mata
- María Ángeles Latorre Górriz
Editorial: Asociación Interprofesional para el Desarrollo Agrario
ISBN: 978-84-606-7969-1
Año de publicación: 2015
Volumen: 1
Páginas: 287-289
Congreso: Jornadas sobre producción animal (16. 2015. Zaragoza)
Tipo: Aportación congreso
Resumen
The aim of this work was to study the relationship between soluble fiber and the n-6/n-3 ratio on rabbit nitrogen and energy retention during the fattening period. To this end a factorial design was used with two soluble fibre levels (7.8 vs. 14.4%; LF and HF) and two n-6/n-3 ratios (3.5 vs. 13.4; Ln-3 and Hn-3) resulting in four experimental diets (LF_Ln-3, LF_Hn-3, HF_Ln-3 and HF_Hn-3). A total of 160 rabbits weaned at 26 d of age were used (40/diet). Energy and nitrogen content of rabbits and carcasses were recorded in vivo from weaning (26 d) to 62 days of age using bioelectrical impedance. High level of soluble fibre decreased digestible N intake (P=0.039), having no effect on carcass N retention but increasing N retention efficiency by 4% (P=0.029). Similarly, n-3 fatty acids decreased digestible N intake by 4% (P=0.019), with no effect on carcass N retention, and tended toincrease the efficiency of N retention (P=0.078). Urinary N was the major fraction of excreted N, and it was reduced by 10% (P=0.011) when soluble fibre increased and by 10% (P=0.012) when n-3 fatty acids increased. Treatments had no effect on digestible energy intake and gross energy retained in carcass. However, in rabbits fed low soluble fibre diets efficiency of digestible energy retention was reduced when n-3 fatty acids decreased (P<0.05).