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| Rocha,Tatiana Cristina da; Gomes,Paulo Cezar; Donzele,Juarez Lopes; Rostagno,Horacio Santiago; Mello,Heloisa Helena de Carvalho; Ribeiro,Cleverson Luís Nascimento; Troni,Allan Reis. |
| Two-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),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Egg production; Ideal protein; White laying hens. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001200007 |
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| Mello,Heloisa Helena de Carvalho; Gomes,Paulo Cezar; Rocha,Tatiana Cristina da; Donzele,Juarez Lopes; Almeida,Rodrigo Lopes de; Troni,Allan Reis; Carvalho,Bruno Reis de; Viana,Gabriel da Silva. |
| Two hundred and fifty-two Hy-Line W36 laying hens were allotted in a completely randomized design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal ratio of isoleucine (Ile) in relation to lysine (Lys) to laying hens aged 42-58 weeks. Experimental diets contained digestible Ile at different levels, 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). A basal diet was formulated to provide Isoleucine in levels below recommendations. This diet was supplemented with L-isoleucine to make up the 6 diets. Each diet was made isonitrogenous by varying the dietary contents of glutamic acid and isocaloric by adjusting the contents of cornstarch. All essential amino acids were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible amino acids; Egg quality; Ideal protein; White laying hens. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500032 |
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