The aim of this study was to determine the effects of four sources of commercial phytases on the performance and bone integrity of broilers from 1 to 28 days of age. Three hundred 1-day old Cobb 500 male chickens were distributed in 30 pens (10 birds per pen) and fed with the experimental diets for 28 days. The treatments were: T1, diet with adequate phosphorus (PAD); T2, phosphorus deficient diet (PDD); T3, PDD + phytase A (100 g/t); T4, PDD + phytase B (100 g/t); T5, PDD + phytase C (50 g/t) and T6, PDD + phytase D (50 g/t). Feeds and water were provided ad libitum. Body weight, body weight gain, feed consumption, feed conversion, and mortality were recorded weekly. At 28 days of age, 20 chicks per treatment were slaughtered to determine carcass and leg yield and tibia weight, plus bone moisture and ash content in the tibia. The results showed that the productive performance of broiler...

The aim of this study was to determine the effects of four sources of commercial phytases on the performance and bone integrity of broilers from 1 to 28 days of age. Three hundred 1-day old Cobb 500 male chickens were distributed in 30 pens (10 birds per pen) and fed with the experimental diets for 28 days. The treatments were: T1, diet with adequate phosphorus (PAD); T2, phosphorus deficient diet (PDD); T3, PDD + phytase A (100 g/t); T4, PDD + phytase B (100 g/t); T5, PDD + phytase C (50 g/t) and T6, PDD + phytase D (50 g/t). Feeds and water were provided ad libitum. Body weight, body weight gain, feed consumption, feed conversion, and mortality were recorded weekly. At 28 days of age, 20 chicks per treatment were slaughtered to determine carcass and leg yield and tibia weight, plus bone moisture and ash content in the tibia. The results showed that the productive performance of broiler...

The aim of this study was to determine the productive performance of broilers fed cassava meal (Manihot esculenta) as partial replacement of maize in the finishing stage. A total of 96 broiler chickens of the 21-day-old Cobb line were used, distributed in 12 experimental pens corresponding to three treatments with four repetitions. The substitution levels of maize for cassava meal were 0, 10 and 20%, which represented the treatments T0 (control), T1 and T2, respectively. Each treatment had 32 chickens and each repetition eight chickens. The effect of cassava flour on feed consumption, weight gain, feed conversion, mortality and productive efficiency index was evaluated. No significant differences were found between treatments in the evaluated indicators, indicating that cassava meal can effectively replace up to 20% in broiler maize-based diets.

The aim of this study was to determine the productive performance of broilers fed cassava meal (Manihot esculenta) as partial replacement of maize in the finishing stage. A total of 96 broiler chickens of the 21-day-old Cobb line were used, distributed in 12 experimental pens corresponding to three treatments with four repetitions. The substitution levels of maize for cassava meal were 0, 10 and 20%, which represented the treatments T0 (control), T1 and T2, respectively. Each treatment had 32 chickens and each repetition eight chickens. The effect of cassava flour on feed consumption, weight gain, feed conversion, mortality and productive efficiency index was evaluated. No significant differences were found between treatments in the evaluated indicators, indicating that cassava meal can effectively replace up to 20% in broiler maize-based diets.