Resumo

CARDOSO, D.M. et al. Effect of the use of enzymatic complex in diets for broilers. Arch. zootec. [online]. 2011, vol.60, n.232, pp.1053-1064. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000400021.

This work was carried out in order to evaluate the effects of supplemental carbohydrases individually (α-amylase) or associated with the enzyme complex (α-galactosidase, galactomananase, xylanase and β-glucanase) on performance, carcass yield and economic viability in diets for broiler. Were used 576 females chicks, Cobb lineage, distributed in a completely randomized design consisting of 4 treatments and 6 replicates of 24 birds each plot. The diets were formulated based on corn and soybean meal, and the treatments consisted of PC= positive control diet NC= negative control diet with 35 kcal reduction in the initial stage and 70 Kcal/kg of feed for the growth and final stages RA= diet reformulated with exogenous amylase (isonutriente to PC) and RE= diet reformulated with exogenous α-amylase and enzyme complex (isonutriente to PC). The nutritional matrix exogenous amylase for RA in the diet was 116.67 Kcal/kg in the initial stage and 233.34 Kcal/kg in the growth and final stages. The nutritional matrix exogenous amylase for RE was 116.67 Kcal/kg at the initial and 200.00 Kcal/kg in the growth and final stages. There was appreciation of the ingredients corn and soybean meal at 1.5 and 6% in AME, and 2% respectively in limiting amino acids for both ingredients. The average performance were evaluated from 1 to 21, 1 to 35 and 1 to 42 days. Feed intake in all periods, did not differ significantly between treatments (p>0.05). Likewise, weight gain in the total period, 1-42 days, caused no difference between treatments. The worst feed conversion and production factors (p<0.05) were observed in animals treated with diets with the enzyme complex. There was no significant difference in carcass yield and no cutting evaluated (p>0.05). The evaluation of carcass yield and cuts, and the economic viability were evaluated at 42 days. The use of enzyme complex associated with exogenous enzyme α-amylase worsens performance and generates the same economic response in the production of broilers, without changing the carcass and its cuts yield.

Palavras-chave : Performance; Carcass yield; Economic viability.

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