Níveis nutricionais de treonina digestível para poedeiras comerciais durante o segundo ciclo de postura
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Data
2010
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Resumo
An experiment was carried out to estimate the optimum level of digestible threonine for white-egg and
brown-egg laying hens in the second laying cycle. It was used 360 laying hens, 180 were white-egg and 180 were brownegg
laying hens which were distributed in a complete randomized design in 5 × 2 factorial arrangement (5 levels threonine
× 2 lines of laying hens). The levels of digestible threonine used were the following: 0.380, 0.413, 0.445, 0.478 and 0.511%.
It was evaluated performance data (production, egg weight and mass), egg components (albumen, yolk and shell), egg internal
quality (Haugh units, albumen and yolk indexes) and percentage of non-commercial eggs and body weight parameters.
Through the obtained results, it was estimated for white-egg laying hens, levels of digestible threonine of 0.446%, which
matches a daily intake of 487 mg/hens and a lysine: threonine relationship equal to 68; for brown-egg laying hens, the
estimate level of digestible threonine was 0.465% with a daily intake of 505 mg/hens and a lysine: threonine relationship
of 71. By comparing the relationship mg digestible threonine per gram of produced eggs, values of 9.5 and 10.0 mg threonine/gram
egg are estimate; gram of produced egg.
Descrição
Palavras-chave
Desempenho, Produção de ovos, Relação de aminoácidos, Amino acid relationship, Egg production, Performance
Citação
CUPERTINO, Edwiney Sebastião et al. Níveis nutricionais de treonina digestível para poedeiras comerciais durante o segundo ciclo de postura. Revista Brasileira de Zootecnia, Viçosa, v. 39, n. 9, p. 1993-1998, 2010.