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Natural Growth Promoters Replacing Traditional Growth Promoters in Diets for Light Replacement Pullets: A Systematic Approach
Castro, M. M; Leite, S. C. B; Farias, R. S; Abreu, C. G; Cordeiro, C. N; Freitas, E. R; Silveira, R. M. F.
Afiliação
  • Castro, M. M; State University of Acaraú Valley. Department of Animal Science. Sobral. BR
  • Leite, S. C. B; State University of Acaraú Valley. Department of Animal Science. Sobral. BR
  • Farias, R. S; Federal University of Viçosa. Department of Animal Science. Viçosa. BR
  • Abreu, C. G; State University of Acaraú Valley. Department of Animal Science. Sobral. BR
  • Cordeiro, C. N; Federal University of Ceará. Department of Animal Science. Fortaleza. BR
  • Freitas, E. R; Federal University of Ceará. Department of Animal Science. Fortaleza. BR
  • Silveira, R. M. F; University of São Paulo. "Luiz de Queiroz" College of Agriculture. Department of Animal Science. Piracicaba. BR
Rev. bras. ciênc. avic ; 25(3): eRBCA-2022-1746, 2023. tab, graf
Article em En | VETINDEX | ID: biblio-1452178
Biblioteca responsável: BR68.1
ABSTRACT
The effect of using natural growth promoters (NGP) to replace traditional antimicrobials on performance, biometry of digestive and reproductive organs, sexual maturity and bone characteristics of replacement pullets was evaluated; and the relationship between these variables according to the diets was verified. Eight-week-old birds were randomly assigned to a completely randomized design and fed different diets negative control (without growth promoters); positive control - conventional growth promoter; organic acids (OA); symbiotic (S); essential oil (EO); OA + S; and EO + S. The performance, relative weight of digestive and reproductive organs and length intestines, height and crest length, sternum length, bone quality and sexual maturity of birds were similar (p>0.05) between treatments. The heat map combined with cluster analysis showed a uniform static pattern with the formation of three horizontal groups formed by the treatments 1) negative control, S and OA + S; 2) positive control and OE and 3) OA and OE + S. A null relationship between the treatments and the variables under study was observed. The principal components analysis revealed an association of variables in three components with 60.55% of variation. NGP can replace traditional promoters, as they do not interfere with performance, biometrics or sexual maturity. Height and length are predictive variables for the development of reproductive organs, especially the oviduct. A similarity was identified through multivariate techniques between symbiotic and organic + symbiotic acids; positive control and essential oils; and organic and symbiotic acids + essential oils.(AU)
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Texto completo: 1 Base de dados: VETINDEX Idioma: En Revista: Rev. bras. ciênc. avic Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: VETINDEX Idioma: En Revista: Rev. bras. ciênc. avic Ano de publicação: 2023 Tipo de documento: Article