Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/14597
Tipo: Artigo
Título: Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks
Autor(es): Rocha, Tatiana Cristina da
Donzele, Juarez Lopes
Gomes, Paulo Cezar
Mello, Heloisa Helena de Carvalho
Troni, Allan Reis
Viana, Gabriel da Silva
Abstract: Two hundred fifty-two Hy-Line W36 laying hens were allotted in a randomized block design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal digestible isoleucine: digestible lysine (Ile:Lys) ratio for laying hens aged 24-40 weeks. Experimental diets contained 5.92, 6.33, 6.73, 7.14, 7.54 and 7.95 g/kg of digestible isoleucine, resulting in different Ile:Lys ratios (0.73:1, 0.78:1, 0.83:1, 0.88:1, 0.93:1 and 0.98:1). Experimental diets were isonitrogenous, with different dietary contents of glutamic acid, and made isocaloric by adjusting the levels of cornstarch. All essential amino acids were provided proportionally to digestible lysine. Feed intake, egg production, egg weight, egg mass, feed conversion ratio per egg mass, feed conversion ratio per dozen eggs, albumen, yolk and eggshell content were assessed. Feed intake, egg production, egg mass and feed conversion ratio were influenced by Ile: Lys ratios quadratically. The egg weight was not affected by Ile: Lys ratio. No differences were observed in the egg quality according to Ile: Lys ratios. The data indicates that the optimum digestible isoleucine: digestible lysine ratio for laying hens aged 24-40 week is 0.84:1, corresponding to the consumption of 681 mg of isoleucine and 811 mg of lysine/hen day-1.
Palavras-chave: Digestible amino acid
Egg mass
Egg production
Protein
Editor: Revista Brasileira de Zootecnia
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1590/S1516-35982013001100003
http://www.locus.ufv.br/handle/123456789/14597
Data do documento: 7-Jun-2013
Aparece nas coleções:Artigos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
v42n11a03.pdftexto completo289,61 kBAdobe PDFThumbnail
Visualizar/Abrir


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.