家畜生态学报2026，Vol.47Issue(8)：32-40,9.DOI:10.3969/j.issn.1673-1182.2026.08.005
不同蛋白水平代乳粉对羔羊生长性能、血清生化指标及屠宰性能的影响
Effects of Different Protein Levels of Milk Replacer Powder on Growth Performance,Serum Biochemical Indices and Slaughter Performance of Lambs
摘要
Abstract
The experiment aimed to investigate the effects of different protein levels in milk replacer on lamb growth performance,serum biochemical indices,slaughter performance,and meat quality.A total of 48 healthy,disease-free,and genetically similar young lambs(initial body weight:4.34±0.15 kg)of three-day-old East Friesian × Hu sheep crossbred males were randomly divided into four groups in a ran-domized complete block design,with three replicates per group and four lambs per replicate.The groups were designated as follows:low-protein level group(L group,22％protein),moderate-low protein level group(ML group,24％protein),moderate-high protein level group(MH group,26％protein),and high-protein level group(H group,28％protein).The trial consisted of a 5-day pre-feeding period fol-lowed by a 49-day formal feeding period.The results demonstrated that on day 52 post-birth,lambs in the ML group exhibited significantly higher body weights compared to those in the L and H groups(P＜0.05).The average daily gain(ADG)in the ML group was also significantly higher than in the L and H groups(P＜0.05).Serum analysis revealed that total protein content and glutamic-oxaloacetic transaminase activi-ty in the ML and MH groups were significantly higher than in the L group(P＜0.05).Additionally,ser-um total cholesterol levels in the MH group were significantly higher than in the L and ML groups(P＜0.05),and serum glucose levels in the ML and MH groups were significantly higher than in the L group(P＜0.05).Serum urea nitrogen concentrations in the MH and H groups were significantly higher than in the L group(P＜0.05).Regarding slaughter performance,the pre-slaughter live weight,carcass weight,and dressing percentage were significantly higher in the ML group compared to the L and H groups(P＜0.05).The eye muscle area in the ML and MH groups was significantly larger than in the L group(P＜0.05).Meat quality assessment showed that the cooked meat ratio was significantly higher in the L group compared to the MH and H groups(P＜0.05).Moreover,meat color measurements indicated that redness was significantly greater in the H group than in the L and ML groups(P＜0.05),while yellowness was significantly higher in the L group compared to the MH and H groups(P＜0.05).In conclusion,feeding milk replacer with a 24％protein level can improve lamb growth performance,carcass weight,and slaugh-ter yield without adversely affecting the health of the lambs.Additionally,it does not negatively impact meat quality.Therefore,the protein content in lamb milk replacer should be maintained around 24％.关键词
羔羊/生长性能/血清生化指标/屠宰性能/肉品质Key words
lamb/growth performance/serum biochemical indicators/slaughter performance/meat quality分类
农业科技引用本文复制引用
刘进亿,张晓宇,牛晨,楚翼健,张磊,宋宇轩..不同蛋白水平代乳粉对羔羊生长性能、血清生化指标及屠宰性能的影响[J].家畜生态学报,2026,47(8):32-40,9.基金项目
国家重点研发计划项目(2022YFD1600101) （2022YFD1600101）
陕西省中央引导地方科技发展资金项目(2024ZY-CGZY-20) （2024ZY-CGZY-20）
