Effect of Different Protein Levels on Growth Performance, Carcass Trait, Digestibility and Some Blood Bieochemical Parameters in Awassi Lambs

Abstract

Twenty one Awassi lambs (4 month old and 23.59 ± 031 kg body weight) were used to investigate the effect of different levels of protein on growth, carcass traits, body composition, digestibility and some blood parameters. The lambs were divided equally and randomly and penned individually into three treatment groups, and fed ad lib on low protein (129.1 T1) medium protein (140.6 T2) and high protein (151.1 T3, g/kg DM). After 72 days of fattening, 5 lambs from each treatment were chosen randomly and slaughtered. The result showed that lambs fed on T3 diet had significantly (P<0.05) higher daily gain (210.83 g), better feed efficiency (4.8 kg/kg), higher dressing percentage (51.67 %), and rib eye area muscle (12.05 cm2) than those fed in T2 and T3, as well as digestibility coefficient of dry matter, organic matter, crude protein, and total digestible nutrient (TDN) was also numerically higher in group fed (151.1 g/kg DM) as compared with lambs received low or medium level of protein. It could be concluded that the high dietary protein level produce the better performance, carcass traits and nutrient digestion of lambs.

The effect of replacing soybean meal with Fava bean seeds in daily ration of Lebanese Baladi goat kids and Awassi sheep lambs: 1- Body performance

“…Metabolizable energy (ME) value calculated for all rations containing FBS and SBM was almost identical to the analyzed value (2. 28 Yateem et al (2021) in using the same levels of energy and protein in their experiments in comparison with the levels that were used in our trials. In the same context, Surra et al (1992) conducted two experiments on weaned lambs feeding in rations lentils (Vicia ervilia) and faba (Vicia faba) beans were substituted (50% or 100%) for soybean cake in diets for weaned lambs.…”