Desempenho, balanço e retenção de nutrientes e biometria dos órgãos digestivos de frangos de corte alimentados com diferentes níveis de proteína na ração pré-inicial
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Data
2006
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Resumo
Two trials were carried out to evaluate performance, balance and retention of EE, DM and CP and
biometrical measures of digestive organs of broiler chicks fed different dietary CP levels in the pre-starter period (1 - 7 d).
In the first experiment, 560 one-day-old Avian Farms chicks were allotted to a complete randomized design with ten
treatments, with a 5 x 2 (protein levels: 18, 20, 22, 24, and 26% x sex) factorial arrangement and four replicates of 14
birds each. In the second experiment, 1,860 one-day-old Ross chicks were assigned to 2.0 x 2.5 m experimental pens. This
experiment was analyzed as a complete randomized design, with five treatments (protein level – 18, 20, 22, 24, and 26%)
and six replications of 62 birds each. In the first experiment, increasing dietary CP levels in the pre-starter period did not
affect performance, but balance and retention of EE had linear and positive effects according to the treatments. No
treatment effect on protein balance was observed, but protein retention showed linear and positive effect. No significant
differences were observed for biometrical measures on 4th fday of experiment, but increasing CP levels improved the
pancreas relative weight. In the experiment 2, it was possible to conclude that the higher protein levels are indicated for
better results in performance.
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Balanço nutricional, Desempenho, Dietas, Órgãos digestivos, Digestive organs, Nutritional balance, Performance, Pre-starter
Citação
STRINGHINI, José Henrique; ANDRADE, Michelle Lobo; ANDRADE, Leonardo; XAVIER, Suzany Aparecida Gomes; CAFÉ, Marcos Barcellos; LEANDRO, Nadja Susana Mogyca. Desempenho, balanço e retenção de nutrientes e biometria dos órgãos digestivos de frangos de corte alimentados com diferentes níveis de proteína na ração pré-inicial. Revista Brasileira de Zootecnia, Viçosa, v. 35, n. 6, p. 2350-2358, 2006.