Abstract

LUCENA, L. R. R.; HOLANDA, M. A. C.  and  HOLANDA, M. C. R.. Growth curve of broiler chicken submitted the cassava meal diet. Cuban J. Agric. Sci. [online]. 2020, vol.54, n.3, pp. 375-386.  Epub Sep 01, 2020. ISSN 2079-3480.

Achieve success in broiler chickens creation is necessary to provide a diet rich in essential nutrients to maximize poultry performance. In this context, cassava stands out, source rich in carbohydrates and can provide great weight gain and decrease the cost of production. Current success in genetic improvement in birds has caused changes in the growth curve, however the objective was to model the weight growth of broiler chickens fed diets containing cassava. A total of 450 male broiler chickens of Cobb lineage were used. The experimental design was completely randomized with five treatments (0, 25, 50, 75 and 100% inclusion of cassava meal) and five repetitions, each experimental unit was composed of 18 birds. To evaluate the weight performance according to age and the inclusion of cassava in the animals' diet, adjustments of regression models were proposed. Power, hyperbolic tangent and gamma models presented the best results for estimating broiler chickens weight. Power model was the most adequate for estimating the weight of broiler chickens as it presents the best criteria (R²=99.7%; SSR=0.09 and AIC=-82.34). The adoption of the power model provides information on the best level of inclusion of cassava meal (100%) and the best time for slaughtering (42 days) birds maximizing the weight in 3,295 g.

Keywords : alternative feeding; chicks; growth curve; weight performance; power model.

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