Efeito da adição de xilanase na disponibilidade de energia em dietas a base de milho e farelo de soja para frangos de corte na fase inicial

Abstract

In order to verify the efficiency of diets with addition of xylanase on the performance of broilers fed diets based on corn and soybean meal, an experiment was conducted at the Poultry Laboratory, Department of Zootecnia, Universidade Federal de Santa Maria (UFSM) during the month in September, we used 560 broilers line Coob 500, housed in cages in acclimatized in boxes of 2.5 m². The birds were subjected to two treatments T1: control diet, T2: control diet 50g/ton xylanase enzyme. The average weight of chickens was 792.09 2.12, with no effect of xylanase enzyme addition on this parameter. The feed, which showed overall mean of 1.47 2.16 was not affected by enzyme supplementation. The data indicated a higher feed intake with addition of xylanase, which did not result in improvement of weight gain. The average values of productive efficiency index (IEP) found at 21 days of age, the chickens fed diet without addition and with addition of xylanase were respectively 234.62 and 244.09. We conclude that the conditions of work, adding the xylanase enzyme in this type of diet did not improve the performance of specific birds, but in relation to an index of productive efficiency of the creation of broilers in the initial period to 21 days.