【摘要】 为研究日粮中补充复合添加剂对湖羊生长性能、体型发育和血浆营养代谢物的影响，采用单因素随机区组试验设计，设空白对照组和复合添加剂组(10 g/(头·d)复合添加剂)2种日粮处理。选择体况良好、出生日期和体重接近的60头2月龄的断奶湖羊，每10头1栏，共6栏，随机接受2种处理，每种处理1栏公羊、2栏母羊，每栏食槽设置营养舔砖供羊只自由采食。结果表明，复合添加剂对湖羊日增重和体型发育无显著影响(P>0.05),而干物质采食量具有降低的趋势(0.05≤P<0.10);添加剂组血浆总蛋白浓度略高于对照组(P>0.05),血浆白蛋白和葡萄糖浓度显著低于对照组(P<0.05),球蛋白浓度显著高于对照组(P<0.05);不同处理组血浆尿素氮和钙离子差异不显著(P>0.05);添加剂组湖羊公斤增重饲料成本较高，养殖毛利略低于对照组。综上，羊群补饲营养舔砖后，酵母、氨基酸复合添加剂对湖羊生长性能提升效果不明显，部分血浆生化指标有所改善，配方有待进一步优化。更多还原

【Abstract】 To investigate the effects of daily ration supplemented with compound additives on growth performance, body size development, and plasma nutritional metabolites in Hu sheep, a single-factor randomized block test design was adopted with two dietary treatments: a blank control group and a compound additive group(10 g/(head·d)). Sixty 2-month-old healthy Hu sheep, with birth date and body weight close to each other were selected and divided into a total of 6 pens(10 lambs per pen). The 6 pens were randomly allocated to two treatments, with one ram pen and two ewe pens for each treatment. Each pen was equipped with a feed trough containing nutrient licking bricks for ad libitum consumption. The results showed that compound additives showed no significant effect on daily weight gain and body size development(P>0.05), tended to decrease dry matter intake(0.05≤P<0.10). Compared to the control group, the additive group exhibited marginally higher concentration of total plasma protein(P<0.05), while demonstrating significantly lower plasma albumin and glucose levels(P<0.05), along with significantly elevated globulin concentration(P<0.05). No significant difference was observed on plasm urea nitrogen and calcium content between different treatment groups(P>0.05). The compound additives showed higher feed cost of each kg body weight gain and lower profit than control group. Above all, after supplementing nutrient licking bricks, the compound additives containing yeast and amino acid has no significant effect on improving the growth performance of Hu sheep, although certain plasma biochemical parameters showed modest improvements. The current formula needs further optimization.更多还原