This study was performed to evaluate the effect of feeding multi-enzyme complex (Rovabio T-FlexTM) (ROV) alone or combined with a growth promoting antibiotic enramycin (ENRA) in a standard corn-soy ration for female broiler chicken from 0 to 30 days of age. ROV is a commercial enzyme that contains xylanase and β-glucanase. A total of 45 female chicks were randomly distributed in a randomized complete block design among 15 cages with 5 replicates/treatment. Birds were divided into 3 groups: T1 = control diet (CONT); T2 = T1 + 0.25 g/kg enzyme (ROV); T3 = T2 + 0.01% enramycin (ROV+ENRA). Cumulative feed intake (FI) and feed conversion ratio (FCR) were affected by treatment (P < 0.05; P < 0.001, respectively). However, cumulative body weight gain (BWG) was not influenced by treatment. Birds which had received CONT and ROV consumed more feed and had higher FCR as compared to ROV+ENRA. Treatment had no effect on dressing percentage, breast muscle yield or leg quarter yield (P > 0.05). As to the analysis of intestinal mucosa morphometrics as a function of treatment, duodenal, jejunal and ileal villi height were influenced significantly by treatment. Birds which had received ROV had longer villi in the duodenum and ileum than did CONT. Jejunal villi were longer in birds which had received ROV+ENRA. On the other hand, the improvements in performance of broilers fed ROV+ENRA could be ascribed to the decreased bacterial count. ROV supplementation had a positive effect on physical alterations in the structure of the small intestine but it was without effect on BWG and FCR.
Online ISSN: 1459-0263Year: 2013, Vol. 11, Issue 3&4, pages 642-646.
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