Uso da batata doce associada à suplementação de enzimas exógenas em rações de frangos de corte

Abstract

Was evaluated the effect of inclusion of sweet potato meal (FBD), as an alternative energy source to corn in broiler diets on performance, carcass yield, morphometry, biometrics, quality meat and cinnamon pigmentation. They were created 936 day-old chicks male Cobb-500 strain for 40 days, using a completely randomized design in a 3x2 factorial arrangement with three diets (two of sweet potato meal (BDC and BDD) and a corn soybean meal as control (MFS) and with or without addition of exogenous enzyme (250U glucanase / kg, alpha-galactosidase 50 U / kg amylase 120U / kg, beta -mananase 440U / kg protease 600U / kg xylanase 2000U / kg lipase 2000U / kg; phytase 500U / kg), totalizing six treatments with 6 repetitions. The sweet potato meal was included in four (4) different levels, increasingly (BDC): (5% in the pre-initial, 9% in the initial 13% in fattening and 17% at slaughter) and in decreasing order (BDD): (17% in the pre-start, 13% in the initial 9% in fattening and 5% in the slaughter). In the period of 1-22 days there was interaction for weight gain variables (GP) and width of villi. The diets of MFS when supplemented with exogenous enzymes promoted higher GP and smaller width of villi in relation to BDC and BDD. The results also showed that there was increase in the absorption surface of the villi, the relative weight of the pancreas and worst feed conversion (CA) promoted by diets with BDC and BDD in isolation. In full-time creation of 1 to 40 days (except for the pancreas) the variables of performance, carcass yield and cuts, meat quality and relative liver weight were not affected by factors evaluated. The partial replacement of corn by sweet potato proved to be technically applicable (regardless of the use of exogenous enzymes) and sweet potato meal can be used in broiler diets without damage intestinal integrity and internal organs related to the digestive system, ensuring good performance and carcass yield and respective cuts and Keywords: alternative food, performance, meat quality also meat quality.