Growing Farafra and Chios Lambs Fed Rations Containing Various Hay Levels | ||||
| Assiut Journal of Agricultural Sciences | ||||
| Article 2, Volume 41, Issue 1, March 2010, Page 28-41 PDF (487.64 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajas.2010.267809 | ||||
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| Authors | ||||
| M. Nasrat Abd El Atه1; Farouk M. Allam1; Hatem A. Hamdon2; Faten F. Abou-Ammo3 | ||||
| 1Faculty of Agriculture, Assiut University | ||||
| 2Faculty of Agriculture, Sohag University | ||||
| 3Animal Production Research Institute, Giza, Egypt | ||||
| Abstract | ||||
| The present study was carried out at Mallawi Animal Production Research Station, belonging to Animal Production Research Institute, Agriculture Research Center, Ministry of Agriculture in cooperation with Animal and poultry Production Department, Faculty of Agriculture, Assuit University to evaluate carcass 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 offals. 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 0% 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 11th ribs cut and meat in carcass (11.73 kg) than Chios lambs (217g) and (9.30 kg), respectively. The differences due to breed genotype were highly significant (P< 0.01). Also, eye muscle area (longissimus dorsi) was higher in Farafra than Chios lambs (11.91 vs. 11.42 cm2), and the differences were highly significant (P< 0.01). Weight of 9, 10 and 11th 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. | ||||
| Keywords | ||||
| Chios; Farafra; Lambs; Carcass | ||||
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