Effect of partial replacement of barley grain with wheat bran in the ration and some feed additive on growth and some carcass traits of Awassi lambs

Abstract This study was conducted in animal research department at ministry of agriculture, by using 32 Awassi lambs (4-5 months in aged) and average body weight 23.25 ± 0.39 kg. Lambs were allocated into four groups, the first (T1) control fed on ration consist of 88% of ground barley, barley grain in the ration in second group (T2) lowered by 50% and replaced with wheat bran. The lambs in third (T3) and fourth (T4) groups were fed on the same ration of (T2) with addition 10 g/lamb daily of yeast ( Saccharomyces Cerevisiae ) in T3 and 10 g of yeast + 0.25 g Vitamin E-se in T4. The results were indicated that replacement with wheat bran in T2 led to significant (p<0.05) decrease in average daily and total gain 0.193 and 16.88 kg as compared to T1 0.244 and 21.25 kg and the addition yeast was not improve lamb growth 0.191 and 16.62 kg, but the addition of Vit E-se were led to similar gain as in control 0.248 and 21.63 kg with significant (p<0.05) increase as compared to T2 and T4. Highest feed conversion ratio was recorded in T4, while the lowest in T2, hot carcass weight was significantly (p<0.05) decreased in T2 and T3 18.46 and 18.42 kg compared with (T1) 21.60 kg, dressing percentage based on empty body weigh before slaughter was increased significantly (p<0.05) in T1 56.34 as compared other treatments 53.41, 52.48 and 53.68% respectively.