Utilização de complexo enzimático em dietas de codornas de corte

Abstract

The aim of this study was to evaluate the effects of supplementation of enzyme complex carbohydrases based on the characteristics of performance, carcass yield and body composition of quails during the period 1-42 days of age. The experimental design was completely randomized with eight treatments and five replicates with 12 birds per experimental unit, considering the cage as an experimental unit. The birds were subjected to the following treatments: T1 - basal ration; T2 - basal ration supplemented with enzyme complex; T3 - Feed with a reduction of 2% (58 kcal / kg) in EM supplemented with enzyme complex; T4 - Feed with a reduction of 4% (116 kcal / kg) in EM supplemented with enzyme complex; T5 - Feed with a reduction of 2% in AA’s (lysine, methionine + cystine and threonine) supplemented with enzyme complex; T6 - Feed with a 4% reduction in AA’s (lysine, methionine + cystine and threonine) supplemented with enzyme complex; T7 - Feed with a reduction of 2% in EM and in AA’s (lysine, methionine + cystine and threonine) supplemented with enzyme complex; T8 - Feed with a 4% decrease in EM and in AA’s (lysine, methionine + cystine and threonine) supplemented with enzyme complex. The performance variables evaluated were: weight gain (g / bird), feed intake (g / bird) and feed conversion (feed intake / weight gain). For carcass yield were evaluated: weight after fasting (g) and relative (%) of carcass, prime cuts (chest and legs) and edible offal (heart, liver and gizzard). For analysis of biometrics weight (g) and total length of intestine (cm) of quail were evaluated. There was a significant difference (P <0.05) on feed conversion of the birds 1-21 days of age, among the treatments. The birds fed with a 4% decrease in AA's + EC (T6) and a 4% decrease in EM and AA's + EC (T8) had worse results when compared to diets with 2% reduction in EM+ EC (T3). There was a significant difference (P <0.05) for feed intake from 22 to 42 days, observing higher feed intake by birds fed treatment containing 4% reduction in AA's + EC (T6) compared to treatment with 2% reduction in MS's and AA + EC (T7) that had the lowest consumption. In the period 1-42 days of age, feed intake and feed conversion of birds differed significantly (P <0.05) among treatments, where the birds who ate diets with 4% reduction in AA's + EC (T6) had greater feed intake. The results observed for carcass yield, cuts and edible offal of quail slaughtered at 14 days of age showed a significant difference (P <0.05) in the absolute weight of birds after fasting and back of quails, in which reduction treatments with 2% and 4% in EM and AA’s + EC showed lower results. The results observed at 28 days of age indicate a significant difference (P <0.05) for the parameter of absolute liver weight of the broilers with baseline treatment (T1) and treatment with 2% reduction in EC + (T3) showed the highest values. To the relative weights of the liver also showed a significant difference (P <0.05), where the biggest weight was observed at baseline (T1). The results observed for carcass yield, cutting edible viscera weight (g) and total length of intestine (cm) quails at 42 days of age indicate no significant difference (P> 0.05) among diets. For the economic analysis, it was found that diets with 2% reduction in AA's + enzyme complex (T5) and T7 treatments (2% reduction EM and AA’s + EC) obtained the best results. This study concluded that supplementation with enzyme complex is efficient in quail diets based on corn and soybean meal, reducing to 2% in the metabolizable energy and amino acids.