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Duarte, Karina Ferreira; Junqueira, Otto Mack; Filardi, Rosemeire da Silva; Laurentiz, Antonio Carlos de; Domingues, Carla Heloisa de Faria; Rodrigues, Eliana Aparecida. |
Current experiment established different criteria to evaluate the requirements of digestible isoleucine for 22- and 42-day-old broilers by different regression models (quadratic, exponential and Linear Response Plateau) and, in the case of statistical significance, the comparison of means by Duncan’s test at 5% probability. A total of 1,920 Cobb 500 male broilers were used in an entirely randomized experimental design, with 6 treatments (6 digestible isoleucine levels: 0.6118; 0.6655; 0.7192; 0.7729; 0.8265 and 0.8802%) and 8 replications, with 40 broilers each. Data on performance and carcass characteristics were evaluated. Level 0.7192% of digestible isoleucine was considered standard. The digestible isoleucine level recommended for 22- and 42-day-old... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible amino acids; Ideal protein; Performance; Regression analyses. |
Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/24473 |
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Pereira, Adriana Aparecida; Junqueira, Otto Mack; Griep Junior, Dirceu Neutzling; Lima Júnior, Dorgival Morais de; Sgavioli, Sarah; Morais, Socorro. |
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,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphorus; Chicken; Nitrogen; Eggs.. |
Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33097 |
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