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dc.creatorRocha, Tatiana Cristina da-
dc.creatorGomes, Paulo Cezar-
dc.creatorDonzele, Juarez Lopes-
dc.creatorRostagno, Horacio Santiago-
dc.creatorMello, Heloisa Helena de Carvalho-
dc.creatorRibeiro, Cleverson Luís Nascimento-
dc.creatorTroni, Allan Reis-
dc.date.accessioned2020-03-23T10:53:11Z-
dc.date.available2020-03-23T10:53:11Z-
dc.date.issued2013-
dc.identifier.citationROCHA, Tatiana Cristina da et al. Digestible threonine to lysine ratio in diets for laying hens aged 24-40 weeks. Revista Brasileira de Zootecnia, Viçosa, v. 42, n. 12, p. 879-884, 2013.pt_BR
dc.identifier.issne- 1806-9290-
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/18883-
dc.description.abstractTwo-hundred sixteen white laying hens were used to assess the ideal ratio of digestible threonine:lysine in diets for laying hens at 24 to 40 weeks of age. Birds were assigned to a randomized block design, with six treatments, six replicates per treatment and six birds per experimental unit. The cage was used as the blocking criterion. Experimental diets contained different digestible threonine:digestible lysine ratios (65, 70, 75, 80, 85 and 90%) with 142 g/kg of crude protein. Experimental diets were formulated to be isonitrogenous and isocaloric with different contents of L-glutamic acid. Feed intake (g/hen/d), egg production (%), egg weight (g), egg mass (g/hen/d), feed conversion ratio (kg/dozen and kg/kg egg), eggshell weight (g), albumen weight (g), yolk weight (g) and body weight gain (g) were assessed. The maximum egg production was observed at 78% digestible threonine:digestible lysine ratio, while the best values of feed conversion ratio (kg/dozen egg) and feed conversion ratio (kg/kg of egg) were observed at 77.6% and 75%, respectively. Feed intake, egg mass and egg contents (yolk, albumen and eggshell) were not affected by treatments. The estimated digestible threonine:digestible lysine ratio of Hy-Line W36 laying hens at 24 to 40 weeks of age is 78%, corresponding to 5.70 g/kg of dietary digestible threonine.pt_BR
dc.language.isoengpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectAmino acidspt_BR
dc.subjectEgg productionpt_BR
dc.subjectIdeal proteinpt_BR
dc.subjectWhite laying henspt_BR
dc.titleDigestible threonine to lysine ratio in diets for laying hens aged 24-40 weekspt_BR
dc.typeArtigopt_BR
dc.publisher.countryBrasilpt_BR
dc.identifier.doi10.1590/S1516-35982013001200007-
dc.publisher.departmentEscola de Medicina Veterinária e Zootecnia - EVZ (RG)pt_BR
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