Effects of different dietary inclusion levels of macadamia oil cake on growth performance and carcass characteristics in South African mutton merino lambs |
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Authors: | Owoahene Acheampong-Boateng Archibold G. Bakare Douglas B. Nkosi Khanyisile R. Mbatha |
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Affiliation: | 1.Department of Agriculture and Animal Health,University of South Africa,Florida,South Africa;2.Agricultural Research Council, API,Irene,South Africa |
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Abstract: | Growth performance and carcass characteristics of South African mutton merino fed graded levels of macadamia oil cake were assessed. A total of 60 South African mutton merino lambs were used in the experiment (initial live weight 25.0?±?0.45 kg). Five diets with different inclusion levels of macadamia oil cake (MOC) were formulated: T1 (0% MOC, control), T2 (5% MOC), T3 (10% MOC), T4 (15% MOC) and T5 (20% MOC). Effects of inclusion level of MOC on average daily gain (ADG) and average daily feed intake (ADFI) were not significant (P?>?0.05). Effects of inclusion levels of MOC on feed conversion ratio (FCR) of sheep were significant (P?0.05). Highest proportion (71.2%) of sheep in the study had a carcass fat classification of 2, followed by a proportion of 17.3% sheep with a carcass fat classification of 3 and lastly 11.5% sheep had carcass fat classification of 4. Warm and cold carcass mass, chest circumference, carcass length and dressing percentage were higher in sheep fed on 5% MOC compared to other treatment diets (0, 10, 15 and 20% MOC) (P?0.05). Fat rib eye had a greater area in sheep fed on 5% MOC (P?0.05). It was concluded that 5% MOC provided the best results in terms of carcass characteristic measurements in sheep. |
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