Effect of dietary alpha yea mix supplementation on broiler chickens performance [electronic resouce].

Includes references.

This experiment was conducted to investigate the effect of dietary Alpha Yea Mix (Yeast extract and Digestive enzymes) supplementation at levels of 0.1 and 0.2% on the growth performance of broiler chickens. One hundred and forty seven, one-day Hubbard broiler chicks were distributed in this study into 7 groups, (control and 6 treatments). Each group included three replicates of 7 chicks, each. The seven groups were as follows: Birds in group 1 (T1) fed the control diet from 1 to 42 days of age. Birds in groups 2 and 3 (T2 and T3) fed control diet supplemented with 0.1 and 0.2% Alpha Yea Mix, respectively from 1 to 21 days of age and then birds fed control diet until 42 days of age. Birds in groups 4 and 5 (T4 and T5) fed the control diet from 1 to 21 days of age and then fed the control diet supplemented with 0.1 and 0.2% Alpha Yea Mix, respectively from 22 to 42 days of age. Birds in groups 6 and 7 (T6 and T7) fed the control diet supplemented with 0.1 and 0.2% Alpha Yea Mix, respectively from 1 to 42 days of age. At 6 weeks of age, birds fed dietary of T3 recorded the best (P≤0.05) values of body weight (BW), daily body weight gain (BWG) and cumulative feed conversion (FCR) than other dietary treatments. These improvements were 24.4, 23.7, 16.1, 21.0, 13.4 and 17.1% for BW, 25.0, 24.2, 16.5, 21.4, 13.7 and 21.4% for BWG and 18.0, 19.8, 14.0, 22.1, 19.2 and 18.0% for FCR than that of T1, T2, T4, T5, T6 and T7, respectively. The overall mean of feed consumption (FC) in control group (T1) were decreased (P≤0.05) by 11.5, 7.1, 8.6, 16.1 and 9.7% as compared with that of T3, T4, T5, T6 and T7, respectively. No significant differences were found among all groups in carcass weight and dressing percentage. The birds fed on T3 group had the best economical efficiency (EE) value by 30% as compared with the birds of control group. It was concluded that the broilers chicks fed control diet supplemented with 0.2% Alpha Yea Mix from 1 to 21 days of age (T3) and then fed control diet until 42 days of age had best (P<0.05) growth performance and also recorded the best economical efficiency as compared with control birds fed the control diet or other dietary treatments.

Summary in Arabic.

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