This experiment was carried out to determine of the values of apparent metabolizable energy (AME) and nitrogen corrected apparent metabolizable energy (AMEn) and to determine of the chemical composition of some feeds. The traditional method of total excreta collection was used with male broilers chickens in the period from 21 to 30 days old and 41 to 50 days old. The birds were distributed to a completely randomized experimental design, with eleven diets, ten with tested feeds and one reference diet, and each diet with six replications and six and four birds per experimental unit. The following feeds were studied: broken rice, whole rice meal, corn, sorghum, wheat bran, soybean meal, peanut meal, and cottonseed meal, 28%CP, and two sugarcane yeast (40 and 43% CP). The values of AMEn (kcal/kg as fed), in the first and second experimental periods were, respectively, for sugarcane yeast 40% CP: 2.395 and 2.483, for sugarcane yeast 43% CP: 2.626 and 2.726, for soybean meal: 2.202 and 2.306, for cottonseed meal 28% CP: 1.605 and 1.786: for peanut meal: 2.155 and 2.471, for wheat bran: 1.683 e 1.877, for sorghum: 3.165 and 3.364, for corn: 3.351 and 3.524, for whole rice meal: 2.446 and 2.650 and for the broken rice: 3.138 and 3.278. All values of AME and AMEn, for al feeds, were higher in second experimental period, showing that, with advancing of the age, birds improve the utilization of feeds.
broiler chicks; ingredient; total collection; traditional method
