Study on Slaughter Performance and Six- Month -Old Mutton Composition of Hetian Multi-fetal Red Sheep

【Objective】 In order to understand the slaughter performance and mutton composition of Hetian multi-fetal red sheep, and to provide reference for its development and utilization. 【Method】 In this experiment, six male Hetian multi-fetal red sheep at three stages of 6-month-old lamb, 12-month-old lamb and 2-year-old adult lamb were selected, and their slaughter performance and mutton composition of 6-month-old lamb were determined. 【Result】 The results showed that：the slaughter rate of 6-month-old lamb was significantly different from that of adult lambs（P<0.01）,and that between the lambs and the aged lambs was significant（P<0.05）;Is fat tail used as clean meat, the net meat rate and bone to meat ratio of 6-month-old lamb were significantly different from those of one year old and adult sheep（P<0.01）;In addition to the bone to meat ratio of one year old sheep,fat tail had significant difference in net meat rate and bone to meat ratio of Hetian multi-fetal red sheep at different ages（P<0.05）;The results showed that the content of moisture and Crude fat in 6-month-old Hetian multi-fetal red sheep was（98.00±0.95 g/kg）,and the contents of amino acids and minerals were rich,including（1,600.00±2.66）mg/kg of phosphorus,（41.30±1.71）g/kg of oleic acid and（17.40±1.30）g/kg of stearic acid. 【Conclusion】 To sum up：the carcass quality of one year old sheep and adult sheep is better than that of 6-month-old sheep, and the management of Hetian multi-fetal red sheep at 6-month-old needs to be strengthened;fat tail has a great impact on slaughter performance of Hetian multi-fetal red sheep;the meat composition of 6-month-old Hetian multi-fetal red sheep is more comprehensive and has higher nutritional value.