PERFORMANCE AND CARCASS CHARACTERISTICS OF BROILER CHICKENS FED WITH DIETS WITH OR WITHOUT PROBIOTIC ON RAISED ON NEW OR REUSED LITTER
DOI:
https://doi.org/10.5216/cab.v10i1.2905Keywords:
Avicultura, nutriçãoAbstract
Three trials were carried out to evaluate the performance and carcass characteristics of broiler chickens raised on new or reused litter until four cycles and consuming diets with or without probiotic. In each trial, there were eight hundred one-day-old male Ross broiler chicks that were placed in 20 pens with constant population density of 10 birds/m2 and shared in a randomized design with four treatments and five replications at a factorial arrangement 2x2 (new litter or reused litter versus diets with or without probiotics). The composition of probiotic consisted of Bacilus subtilis and B. coagulans (2X109 and 1X107 UFC, respectively). The birds and the remaing diets were weighed on the 21st and 42nd days to determine the performance. In each trial, on the 42nd day, four birds from each pen were slaughtered to evaluate the carcass characteristics. No significative interation (P>0.05) was noticed between the kind of litter and diet with or without probiotic in the rearing cycles realized. In the trial with reused litter by two cycles, the birds fed on probiotic showed the lowest weight gain and the worst ratio feed conversion (P<0.05) from 1 to 21 days. However, no statistical diferences (P>0.05) was noticed from 1 to 42 days and in the other trials. The same result was verified to the carcass yield and parts (P>0.05). In the trial of reused litter by three cycles, the birds showed higher weight gain and better ratio feed conversion, when compared with the birds raised in the new litter. The birds raised in the reused litter by four cycles showed higher weight gain. From these results, it can be concluded that there are not benefits to the performance and carcass characteristics of the broiler chickens when the probiotic is supplemented to the diet, however, from the reutilization of the litter by three cycles, there can be benefits to the performance of the chickens, depending on the sanitary condition of the previous rearing.KEY WORDS: Carcass yield, feed conversion, feed intake, weight gain.
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Published
2009-04-02
How to Cite
TRALDI, A. B.; DE OLIVEIRA, M. C.; RIZZO, P. V.; DE MORAES, V. M. B. PERFORMANCE AND CARCASS CHARACTERISTICS OF BROILER CHICKENS FED WITH DIETS WITH OR WITHOUT PROBIOTIC ON RAISED ON NEW OR REUSED LITTER. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 1, p. 107–114, 2009. DOI: 10.5216/cab.v10i1.2905. Disponível em: https://revistas.ufg.br/vet/article/view/2905. Acesso em: 22 nov. 2024.
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Animal Production
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