Níveis de inulina em rações de origem animal e vegetal para frangos de corte

Abstract

This study aimed to evaluate the effect of inulin inclusion levels in diets with ingredients of vegetable and animal origin, on the performance and carcass yield of broilers chickens. Were used 1056 chicks, of one day old, housed in reused poultry litter, distributed in a completely randomized design, in a factorial 2 × 4 (animal and vegetable diets x inclusion levels of inulin), totaling eight treatments, six replicates and 22 birds per experimental unit. The inulin levels were: 0, 0.25, 0.50 and 0.75%. At seven, 21 and 40 days of age were evaluated: final weight, weight gain, feed intake, feed conversion and viability. At 40 days were evaluated: productive efficiency, economic variables and carcass yield. No effects of inulin and type of diet were observed on the performance from one to seven days old (P>0.05). From one to 21 days, a feed consumption decreased (P<0.05) with the inclusion of inulin. The diet with animal ingredients provided greater carcass yield, thigh and lower abdominal fat percentage (P<0.05) at 40 days of age. The abdominal fat reduced (P<0.05) with the inclusion of inulin incresase. It is concluded that inulin can be used, up to the level of 0.75% in diets of animal or vegetable origin without sacrificing the broilers performance.