Growth and body nutrient deposition of two broiler commercial genetic lines

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Data

2008-06-01

Autores

Marcato, S. M. [UNESP]
Sakomura, N. K. [UNESP]
Munari, D. P. [UNESP]
Fernandes, J. B.K. [UNESP]
Kawauchi, Í. M. [UNESP]
Bonato, M. A. [UNESP]

Título da Revista

ISSN da Revista

Título de Volume

Editor

Fundação APINCO de Ciência e Tecnologia Avícolas

Resumo

The objective of this work was to study growth and body nutrient deposition profiles of male and female Cobb and Ross broilers using Gompertz equations. A total number of 1,920 one- to 56-day-old broilers were used. A randomized experimental design in a factorial arrangement (2 strains x 2 sex), with 4 replicates of 120 birds each, was applied. Diets were formulated to supply the nutrient requirements recommended by the genetic companies. A sample of birds was weekly weighed and sacrificed after 24 hours fasting. Carcasses were de-feathered and weighed again. The parameters of the Gompertz equation for body weight and its components (water, ashes, protein, and fat) were estimated. An interaction (p<0.05) between sex and breed was observed for mature weight (Wm) (kg), growth rate (b) (daily) and time at maximum growth rate (t*) (day) of body weight, and body water and ash. Cobb was presented earlier growth and body protein and ash deposition. Ross strain was superior in body water deposition.

Descrição

Palavras-chave

Body composition, broilers, growth, Gompertz curves

Como citar

Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 10, n. 2, p. 117-123, 2008.