Título:	Digestible threonine levels in the starter diet of broilers derived from breeders of different ages
Autor(es):	Tanure, Candice Bergmann Santos, J. S. Oliveira, E. M. Laboissiere, Michele Racanicci, Aline Mondini Calil Pimentel, Concepta Margaret McManus Café, Marcos Barcellos Stringhini, José Henrique
Assunto:	Desenvolvimento Metabolismo Nutrição Ave doméstica
Data de publicação:	Out-2015
Editora:	Fundação APINCO de Ciência e Tecnologia Avícolas
Referência:	TANURE, Candice Bergmann Garcia e Silva et al. Digestible threonine levels in the starter diet of broilers derived from breeders of different ages. Revista Brasileira de Ciência Avícola, Campinas, v. 17, n. spe, p. 31-37, out./dez. 2015. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015001000031&lng=en&nrm=iso>. Acesso em: 4 abr. 2018. doi: http://dx.doi.org/10.1590/1516-635XSPECIALISSUENutrition-PoultryFeedingAdditives031-038.
Abstract:	The aim of this study was to evaluate the effect of digestible threonine supplementation in the starter diet on the performance, intestinal parameters, and nutrient metabolism of broilers derived from breeders of different ages. In total, 480 one-day-old Cobb chicks, derived from 38-or 49-week-oldbreeders, were housed in experimental battery cages until 21 days of age and fed four different threonine levels (800, 900, 1,000, or 1,100 mg/kg) in the starter feed. A completely randomized experimental design in a 2x4 factorial arrangement (breeder age x threonine levels) was applied, totaling eight treatments with five replicates of 12 birds each. Broilers from older breeders fed 800 mg digestible threonine/kg of diet presented higher weight gain, with a positive linear effect. There was also an interaction between breeder age and threonine levels for the weight gain of 21-d-old broilers supplemented at maximum level of 1,003 mg Thr/kg diet during the starter phase. There was no effect of breeder age or threonine levels on nutrient metabolism during the period of 17-21 days. There was no influence of breeder age or threonine levels in the starter diet on intestinal morphometric measurements, absorption area, or percentage of goblet cells.
Unidade Acadêmica:	Faculdade de Agronomia e Medicina Veterinária (FAV)
Licença:	Revista Brasileira de Ciência Avícola - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015001000031&lng=en&nrm=iso. Acesso em: 4 abr. 2018.
DOI:	http://dx.doi.org/10.1590/1516-635XSPECIALISSUENutrition-PoultryFeedingAdditives031-038
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