Níveis de lisina e treonina digestíveis na ração de poedeiras comerciais sobre a qualidade de ovos
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Data
2009
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Resumo
This research had the objective of evaluating
the influence of different levels of digestible lysine and threonine in the ration of
commercial laying hens (Lohmann LSL) aged between 25 and 44 weeks on the quality of
eggs. Three-hundred sixty laying hens were fed rations containing different levels of
digestible lysine (0.700; 0.800 and 0.900%) combined with threonine (0.500; 0.550 and
0.600%). The rations contained 16% crude protein. The experimental set up was in a
completely randomized design in a 3x3 factorial scheme (three levels of lysine and three
levels of theronine), resulting in nine treatments with five replicates. The experiment unit
consisted of a cage with eight hens each. The data on specific gravity, weight of eggs, total
solids of yolk, Haugh unit, percentage of yolk, albumin and shell were submitted to analysis
of variance and polynomial regression using the SAS statistical software. No regression
effect was observed for either lysine or threonine intake for the studied parameters, except
for albumin percentage. Interaction was verified between the levels of lysine and theronine
(p < 0.05) in the rations regarding specific gravity. The levels of 900 and 550 mg of
digestible lysine and threonine, respectively, enhanced the specific gravity, whereas for the
other parameters of egg quality, the recommendation is 700 mg of digestible lysine and 500
mg of digestible threonine in the ration.
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Palavras-chave
Aminoácido digestível, Poedeiras leves, Unidade haugh, Digestible aminoacids, Laying hen, Haugh unit
Citação
MATOS, Maíra Silva; LEANDRO, Nadja Susana Mogyca; CARVALHO, Fabyola Barros; STRINGHINI, José Henrique; CAFÉ, Marcos Barcellos; LOPES, Karina Ludovico. Níveis de lisina e treonina digestíveis na ração de poedeiras comerciais sobre a qualidade de ovos. Acta Scientiarum. Animal Sciences, Maringá, v. 31, n. 1, p. 25-29, 2009.