Uso de enzimas na alimentação de Frangos de corte

Abstract

Two experiments were done by Aviculture Department of Agronomy School of Federal University in Bahia in order to evaluate microbial enzymes effects over Ross broiler’s performance, by weight gain parameters, meal consume and feeding conversion. The first experiment was realized using 288 chicks with 8-21 days old, the experimental delineation used was completely by chance, in a factorial set 2 X 2, with contents: meal (soy flour + sorghum and soy flour + millet) and multi-enzymatic complex (with or without multi-enzymatic), with 4 repetitions per treatment, being each portion with 18 birds (9 males and 9 females). The diets were formulated containing equal energy levels, amino acids, Ca and P and 1 kg of multi-enzymatic complex per 200 kg of soy in enzyme supplemented diets. The inclusion of multi-enzymatic complex, both soy flour and sorghum and soy flour and millet based feed did not provide benefits in broiler’s performance. The second experiment was using 384 broilers, with 21-42 days old. The experimental delineation used was the completely by chance, with 6 treatment and 4 repetitions and 16 birds (8 males and 8 females) per experimental unit. The experimental diets were prepared based on corn, soy flour, varityping the metabolisable energy level (ME) by 7 and 9%, amino acids level (AA) by 7 and 5 % with multi-enzymatic complex presence or not, mixed in the feed in a proportion of 1 kg per 200 kg of soy. It was concluded that ME and amino acids (Met, Met+Cys and Lys) values can be overestimated in 9 and 7%, respectively, when there was the addition of enzymatic complex to the broilers diets (21-42 days), without reducing bird performance.