Effects of different fattening systems on fattening performance,slaughter and carcass characteristics of male tuj lambs [Farklı Besi Sistemlerinin Erkek Tuj Kuzularında Besi Performansı,Kesim ve Karkas Özelliklerine Etkisi]

The purpose of this study were to determine effects of fattening systems on fattening performance (n=39) and slaughter and carcass characteristics (n=24) in male tuj lambs. three different fattening groups were formed as extensive (n=13),semi-intensive (n=13) and intensive (n=13). lambs in the extensive group were grazed in pasture. in addition to pasture,concentrated feed was given to lambs in the semi-intensive group. high quality fodder and concentrated feed were given to those in the intensive group. the study was completed in 90 d. final live weights of extensive,semi-intensive and intensive groups were 31.19,41.22,and 40.56 kg (p<0.001),respectively,and for daily live weight gain were (dlwg) 117.52,229.66,and 221.11 g (p<0.001),respectively. feed conversion rates (fcr) were 3.05 and 5.16 respectively in the semi-intensive and intensive fattening. it was found that hot carcass weight was 13.41,19.51,and 19.89 kg (p<0.001) in extensive,semi-intensive,and intensive fattening groups respectively. hot carcass yield was 43.11,46.95,and 49.77% (p<0.001) in extensive,semi-intensive,and intensive fattening groups respectively. consequently; leg,foreleg,shoulder,neck,flank,and kidney percentages,and spleen and full stomach weights of lambs in the extensive group were higher than in semi-extensive and entensive groups. although there was no statistical difference between semi-extensive and entensive groups in respect to fattening performance,slaugher weight,hot and cold carcass weights,entensive group was higher than the other groups in respect to hot and cold carcass yield. © 2017,veteriner fakultesi dergisi. all rights reserved.