RT info:eu-repo/semantics/article
T1 Effect of Dietary Crude Protein on Animal Performance, Blood Biochemistry Profile, Ruminal Fermentation Parameters and Carcass and Meat Quality of Heavy Fattening Assaf Lambs
A1 Saro Higuera, Cristina
A1 Mateo Oyagüe, Javier
A1 Caro, Inma
A1 Carballo Carballo, Diego Eloy
A1 Fernández, Miguel
A1 Valdés Solís, Carmen
A1 Bodas, Raúl
A1 Giráldez, Francisco Javier
A2 Tecnologia de los Alimentos
K1 Tecnología de los alimentos
K1 Assaf
K1 Feed efficiency
K1 Meat quality traits
K1 Protein
K1 3309 Tecnología de Los Alimentos
AB [EN] Thirty Assaf male lambs (30 ± 1.9 kg of body weight) were allocated to three groups fed diets differing in their crude protein (CP) contents (low protein (LP), 134 g CP/kg dry matter (DM); medium protein (MP), 157 g CP/kg DM; and high protein (HP), 173 g CP/kg DM) to test the effect of dietary protein content on animal performance, rumen function, animal health, and carcass and meat quality. Feed intake was recorded daily, and animals were weighed every second week. Lambs were blood-sampled to determine their acid–base status and biochemical profile. After 70 days of trial, lambs were slaughtered, and the ruminal content was collected to assess ruminal fermentation. Finally, carcass and meat quality were evaluated. Dry matter intake and average daily gain increased (p < 0.05) when increasing the level of dietary CP. There were not significant differences (p > 0.05) in the evaluated parameters in the rumen fluid of lambs. There were not significant differences in carcass or meat quality (p > 0.05) and in those parameters related to blood acid–base status. Several biochemical parameters showed differences depending on diet CP level (urea, protein, albumin, glucose, and calcium; p < 0.05). Feeding costs calculated in relation to cold carcass weight decreased when dietary CP decreased. The results suggested that a dietary protein content greater than 157 g/kg DM would be required to maximize growth performance in Assaf male fattening lambs under 50 kg of body weight. However, a protein content beyond that level was not found to improve either carcass or meat quality and could worsen profitability
PB MDPI
LK https://hdl.handle.net/10612/21130
UL https://hdl.handle.net/10612/21130
NO Saro, C., Mateo, J., Caro, I., Carballo, D. E., Fernández, M., Valdés, C., Bodas, R., & Giráldez, F. J. (2020). Effect of dietary crude protein on animal performance, blood biochemistry profile, ruminal fermentation parameters and carcass and meat quality of heavy fattening assaf lambs. Animals, 10(11), 1-16. https://doi.org/10.3390/ANI10112177
DS BULERIA. Repositorio Institucional de la Universidad de León
RD Jul 12, 2024