Interactions between lipid source and vitamin A on broiler performance, blood parameters, fat and protein deposition rate, and bone development.

Autor:	Savaris VDL; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil. Electronic address: vaneilalenha@hotmail.com., Souza C; Federal University of Technology, Paraná, Department of Agricultural Sciences, Dois Vizinhos, PR, Brazil., Wachholz L; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil., Broch J; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil., Polese C; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil., Carvalho PLO; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil., Pozza PC; State University of Maringá, Department of Agricultural Sciences, Maringa, PR, Brazil., Eyng C; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil., Nunes RV; Western of Paraná State University, Department of Agricultural Sciences, Marechal Cândido Rondon, PR, Brazil.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2021 Jan; Vol. 100 (1), pp. 174-185. Date of Electronic Publication: 2020 Sep 12.
DOI:	10.1016/j.psj.2020.09.001
Abstrakt:	A total of 2622 male broilers were distributed in a 2 × 5 factorial design, using 2 lipid sources (soybean oil and palm fat), 5 levels of vitamin A supplementation (0, 3,000, 6,000, 12,000, and 24,000 IU kg -1 ), with 10 replicates, and also 1 control diet (CD) for each lipid source used (7 replicates), each experimental unit being composed of 23 birds. During the first 21 d (how were the birds fed) and from 22 to 42 d of age, a redistribution of the treatments was carried out in a 2 × 2 × 5 factorial design: half of the repetitions of each treatment received the diet of the initial treatment, and the others received the CD with its type of lipid source. In the phase from 1 to 21 d of age, the effect of lipid source on feed intake (FI) and feed conversion ratio (FCR), and the effect of vitamin supplementation on FI and weight gain (WG) were observed, with a quadratic response for both variables. At 42 d of age, the lipid source and vitamin A level influenced the FI, whereas the WG and FCR showed interactions between period and the level of vitamin A supplementation. Neither lipid source resulted in blood parameters out of the typical pattern for birds, and the same was observed in relation to dietary vitamin A supplementation. From 1 to 21 d of age, a vitamin A supplementation of 15,585 IU kg -1 was estimated, and at 42 d, 15,527 IU kg -1 and 15,148 IU kg -1 were estimated for the periods 1 to 21 d and 1 to 42 d, respectively. (Copyright © 2020. Published by Elsevier Inc.)
Databáze:	MEDLINE
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