Nativa | 2019
COMPLEXO ENZIMÁTICO EM RAÇÕES DE FRANGO DE CORTE DE LINHAGEM CAIPIRA COM INCLUSÃO DE TORTA DA SEMENTE DE CUPUAÇU (Theobroma grandiflorum)
Abstract
O objetivo deste estudo foi avaliar os efeitos da suplementacao de um complexo enzimatico em dietas contendo torta de cupuacu (TSC) sobre o desempenho, rendimento de carcaca e viabilidade economica de frangos de corte de linhagem caipira. Foram utilizados 300 frangos da linhagem caipira “pescoco pelado” em delineamento experimental inteiramente casualizado com 6 tratamentos e 5 repeticoes. Os tratamentos, em arranjo fatorial 3x2, eram constituidos por tres niveis de inclusao de TSC (0, 5, 10 %) e dois niveis de enzimas (sem ou com). As enzimas foram fornecidas com a inclusao de 200 g/t de um complexo de xilanase (12.000 u/g) e β-glucanase (2.500 u/g) e 50 g/t de fitase (5.000 FTU/g). Nao houve diferenca entre os tratamentos no consumo de racao e viabilidade. O ganho de peso diminuiu com o aumento do nivel de TSC na dieta, piorando a conversao alimentar. O uso do complexo enzimatico nao influenciou as variaveis analisadas. O rendimento de carcaca nao foi influenciado pela inclusao de TSC e complexo enzimatico, porem houve diminuicao da gordura abdominal e aumento da moela e intestino com o aumento da inclusao de TSC na dieta. A inclusao de TSC e complexo enzimatico na dieta diminuiu a margem bruta relativa (MBR). Portanto, a inclusao de TSC afetou negativamente nas caracteristicas produtivas das aves, enquanto as enzimas exogenas avaliadas nao foram efetivas em compensar os efeitos deleterios da TSC no desempenho e retorno economico.Palavras-chave: alimentos alternativos, desempenho, enzimas, nutricao animal, rendimento de carcaca.\xa0ENZYMATIC COMPLEX IN FREE-RANGE BROILER DIETS WITH INCLUSION OFCUPUACU (Theobroma grandiflorum) SEED CAKE\xa0ABSTRACT: The purpose of this study was to evaluate with the effects of an enzyme complex supplementation in diets containing cupuacu seed cake (CSC) on the performance, carcass yield and economic viability of free-range broilers. Three hundred broiler chickens of the ‘Pescoco Pelado’ free-range line were used in a completely randomized experimental design with 6 treatments and 5 replicates. Treatments, in a 3x2 factorial design, consisted of three dietary levels of CSC (0, 5, and 10%) and two enzyme levels (without or with). The enzymes were provided by the inclusion of 200 g/t of a xylanase (12000 u/g) and β-glucanase (2,500 u/g) complex, and by 50 g/t phytase (5000 FTU /g). There was no difference on feed intake and viability. The weight gain decreased as the dietary CSM level increased, worsening feed conversion. The enzyme complex did not affected the analyzed variables. The carcass yield was not affected by the inclusion of CSC and enzyme complex, but decreased abdominal fat, and increased gizzard and intestine with dietary CSC levels increasing. The inclusion of CSC and enzyme complex in the diet reduced the relative gross margin (RGM). Therefore, the inclusion of CSC negatively affected the productive characteristics of free-range broilers, while the enzymes were not effective in compensate the CSC side effects on performance and return.Keywords: alternative feedstuffs, animal nutrition, carcass yield, enzymes, performance.