| Registro completo |
| Provedor de dados: |
Animal Sciences
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| País: |
Brazil
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| Título: |
Phytase in diets with crude protein levels for commercial layers
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| Autores: |
Pereira, Adriana Aparecida
Junqueira, Otto Mack
Griep Junior, Dirceu Neutzling
Lima Júnior, Dorgival Morais de
Sgavioli, Sarah
Morais, Socorro
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| Data: |
2017-04-03
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| Ano: |
2017
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| Palavras-chave: |
Phosphorus
Chicken
Nitrogen
Eggs.
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| Resumo: |
The aim of this study was to evaluate the action of the phytase enzyme in diets formulated with variations in the crude protein content on performance and egg quality of commercial layers. A total of 336 commercial layers were housed at eight birds per cage in a 3 × 2 factorial arrangement with seven replicates. Treatments consisted of four crude-protein levels (17, 15, and 13%) and two enzyme levels (0 and 500 FTU kg-1 diet), distributed in a completely randomized design. Feed intake, egg production, feed conversion per dozen eggs and per kilogram, egg weight and mass, specific gravity, eggshell thickness, and Haugh unit were measured over five 28-day periods. The performance of commercial layers fed the diet containing 13% crude protein worsened, irrespective of phytase addition. However, at 15% crude protein, phytase inclusion did not affect feed conversion or egg weight. Inclusion of phytase leads to equal egg-quality and performance results at the dietary crude protein levels of 17 and 15%. The crude protein content of 13%, with or without phytase, is not recommended for the diet of brown-egg layers.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33097
10.4025/actascianimsci.v39i2.33097
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| Editor: |
Editora da Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33097/pdf
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Animal Sciences; v. 39, n. 2 (2017); 163-168
Acta Scientiarum. Animal Sciences; v. 39, n. 2 (2017); 163-168
1807-8672
1806-2636
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| Direitos: |
Direitos autorais 2017 Acta Scientiarum. Animal Sciences
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