Data/hora: 10/06/2024 23:54:40

Provedor de dados: | 89
País: | Brazil
Título: | Comparison between linear and nonlinear systems of feed formulation for broilers
Autores: | Dadalt,JC; Butzen,FM; Ribeiro,AML; Renz,SV; Kessler,A de M; Penz Júnior,AM.
Data: | 2015-03-01
Ano: | 2015
Palavras-chave: | Feed efficiency; Nutritional strategies; Profitability.
Resumo: | Two experiments were simultaneously carried out to compare feed formulation models: a linear model for minimum cost with a nonlinear model for maximum profitability for one-to 42-d-old broilers. One-d-old male or female Cobb 500 broilers (n=2368) were allocated to one of the two trials according to sex. The experiments were performed simultaneously in an experimental poultry farm. Two housing densities were used: high density (HDH), with 14 birds/m2, and low density (LDH), with 10 birds/m2. The following treatments were evaluated: linear feed formulation and LDH (LF10); nonlinear formulation and LDH (NF10); linear formulation and HDH (LF14); and nonlinear formulation and HDH (NF14). A completely randomized design with four treatments of eight replicates each was applied. Performance and cost per kg of poultry were evaluated. Both formulation systems promoted similar broiler performance. However, the high-density feed using linear formulation reduced body weight in 42-d-old males, but not when nonlinear formulation was used. The NF10 treatment yielded the worst feed conversion ratio (p&lt;0.05) and the lowest cost/kg broiler (p&lt;0.05) for both sexes. The results demonstrate that the nutritional program that yields the best performance is not always the most economical one.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100109
Editor: | Fundação APINCO de Ciência e Tecnologia Avícolas
Relação: | 10.1590/1516-635x1701109-116
Formato: | text/html
Fonte: | Brazilian Journal of Poultry Science  v.17 n.1 2015
Fonte: | info:eu-repo/semantics/openAccess