Digestible isoleucine requirements for 22- and 42-day-old broilers
| Autor: | Karina Ferreira Duarte, Otto Mack Junqueira, Rosemeire da Silva Filardi, Antonio Carlos de Laurentiz, Carla Heloisa de Faria Domingues, Eliana Aparecida Rodrigues |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Acta Scientiarum: Animal Sciences, Vol 37, Iss 1, Pp 23-28 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1806-2636 1807-8672 |
| DOI: | 10.4025/actascianimsci.v37i1.24473 |
| Popis: | 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 broilers is 0.7729%, corresponding to a digestible isoleucine:lysine ratio of 72%. |
| Databáze: | Directory of Open Access Journals |
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