Growing Farafra and Chios lambs fed rations containing various hay levels 2.- carcass traits
2010
Abd El-Ati. M.N. | Hamdon, H.A. | Abou-Ammo, F.F. | Allam, F.M.
Evaluate`arcass traits after early fattening experimental period (105 days). Lambs fed rations containing various hay levels (0 %, 6 % and 15 %). At the end of the experiment, eighteen Farafra and Chios lambs were slaughtered to study carcass yield and traits. Farafra lambs recorded higher hot carcass weights (21.61) than Chios lambs (17.79kg). The dressing percentage based on slaughter weight (A) was significantly (P 0.05) higher in Farafra lambs than in Chios lambs (50.11 vs. 47.89%). The prime cuts percentage in Chios lambs were highly significantly (P 0.01) better than in Farafra lambs (79.11 vs. 75.89%). Farafra lambs had higher carcass cuts weights (shoulder, legs, loin, rack, neck, brisket, flank and tail) than Chios lambs as well as of fals. The dressing percentage estimated relative to empty body weight (B) did not differ significantly due to hay level in the ration (55.67 in 15 % vs. 55.33 % in.O% hay). The high level of hay in the ration (15%) recorded higher offal weights than the low level (6%) or full concentrate without hay. farafra lambs had higher sample meat (287 g) of the 9, 10 and 11. th ribs cut , meat in carcass (11.73 kg) than .Chios lambs (217 g) and (9.30 kg), respectively. the differences due to breed genotype were highly significant (P 0.01). Also, eye muscle area (longis- simus dorsi) was higher in Parafra than Chios lambs (11.91 vs. 11.42 cm2), and the differences were highly significant (P 0.01). Weight of 9, 10 and 11. h ribs cut of the group 15% hay carcasses was higher by 7.73 and 8.66% compared to those of group 6% hay or group 0% hay, respectively. But, differences due to hay levels in the ration were not significant.
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Эту запись предоставил Ain Shams University