Efeito de probiótico e enzimas em dietas para frangos de corte na fase de crescimento

Three hundred and twenty Ross male broiler chickens, about 32 to 35 days old, were used to evaluate the effect of probiotic and enzymes in diets containing two energy levels. The standard diet contained 3150 kcal/kg and was based on corn and soybean meal, and the low energy diet had 100 kcal/kg less than the standard diet because it included wheat bran. Each energy level was tested using four treatments: without additive, enzymes, probiotic and enzymes plus probiotic. The experimental design was completely randomized in a 2x4 factorial arrangement totaling eight treatments with five repetitions of eight birds. The effects of apparent metabolizable energy and digestibility of dry matter, crude energy, crude protein, sludge, water and nitrogen excretion were calculated. The level of energy in the diets affected all of the parameters analyzed (P