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Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks

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dc.contributor.author Rocha, Tatiana Cristina da
dc.contributor.author Donzele, Juarez Lopes
dc.contributor.author Gomes, Paulo Cezar
dc.contributor.author Mello, Heloisa Helena de Carvalho
dc.contributor.author Troni, Allan Reis
dc.contributor.author Viana, Gabriel da Silva
dc.date.accessioned 2017-12-07T13:50:49Z
dc.date.available 2017-12-07T13:50:49Z
dc.date.issued 2013-06-07
dc.identifier.issn 1806-9290
dc.identifier.uri http://dx.doi.org/10.1590/S1516-35982013001100003
dc.identifier.uri http://www.locus.ufv.br/handle/123456789/14597
dc.description.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. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Revista Brasileira de Zootecnia pt-BR
dc.relation.ispartofseries v. 42, n. 11, p. 780-784, Nov. 2013 pt-BR
dc.rights Open Access pt-BR
dc.subject Digestible amino acid pt-BR
dc.subject Egg mass pt-BR
dc.subject Egg production pt-BR
dc.subject Protein pt-BR
dc.title Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks en
dc.type Artigo pt-BR


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  • Artigos [1674]
    Artigos Técnico-científicos na área de Zootecnia

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