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Archivos de Zootecnia

On-line version ISSN 1885-4494Print version ISSN 0004-0592


NUNES, J.K. et al. Development of the digestive tract of broilers fed diets containing sweet potato meal. Arch. zootec. [online]. 2011, vol.60, n.232, pp.1105-1114. ISSN 1885-4494.

The development of the digestive tract of broilers fed diets containing sweet potato meal in partial replacement of corn, with or without enzyme supplementation. One hundred and fifty a day old, male, Cobb chickens, were allocated in 40 pens of two batteries where they remained until 28 days old. A completely randomized experimental design was used. Treatments were distributed in a 3 x 2 factorial arrangement, in which three levels of sweet potato meal (0, 20 and 40%) and two levels of enzyme complex (0 or 200 g/ton), with a total of 5 replicates of 5 birds per treatment. At 14, 21 and 28 days of age, 5 birds per treatment were slaughtered by cervical deslocation to evaluate the allometric development of heart, liver, proventriculus ans gizzard and biometric development of duodenum, jejunum, ileum, colon, rectum and ceca. Data were analyzed by analyse of variance and polynomial regression. The use of increasing dietary levels of sweet potato meal bring about a decrease in body weight and in organ development. The enzyme supplementation does not influence the allometry of organs and intestinal biometric of broilers.

Keywords : Alternative feeding; Allometry; Biometry.

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