复合益生菌对生长期湖羊生长性能、养分表观消化率和血液生化指标的影响

Effects of Compound Probiotics on Growth Performance, Apparent Digestibility and Blood Parameters of Growing Hu Sheep

本试验旨在探究不同添加量复合益生菌对生长期湖羊生长性能、营养物质消化率及血液生化指标的影响。选择体重(18.1±1.8)kg的生长期公湖羊60只,随机分成4组,每组15只,分别饲喂含有0、1、2、3 g/kg复合益生菌的颗粒化全混合日粮(PTMR),其中0 g/kg组为对照组。预试期7 d,正试期45 d。结果表明:1g/kg和2g/kg组湖羊平均日增重比较对照组和3g/kg组高出约10%(P<0.05),而耗料增重比显著低于对照组和3 g/kg组;1 g/kg组干物质消化率显著高于其余3组,2 g/kg组粗蛋白质消化率显著高于对照组和3 g/kg组,但各组间中性洗涤纤维和酸性洗涤纤维消化率无显著差异;1 g/kg组湖羊血清总蛋白、球蛋白显著高于其他各组,而白蛋白/球蛋白比值显著低于其他各组。由此分析,生长期湖羊PTMR中复合益生菌的适宜添加量为1 g/kg,可显著提高生长期湖羊日增重、饲料转化效率,增强抗病力。

This study investigated the effects of different doses of compound probiotics on growth performance, nutrients apparent digestibility and blood parameters of growing Hu sheep. Sixty growing male Hu-sheep(18.1±1.8 kg) were randomly divided into 4 groups, fifteen sheep for each group. The compound probiotics supplementary was 0, 1, 2, and 3 g/kg in pelleted total mixed ration(PTMR), respectively, and the 0 g/kg group was set as control group. Animal trial lasted for 45 days, with 7 days adaptation. The results indicated that 1 and 2 g/kg compound probiotics supplementary groups had 10% greater average daily gain than control and 3 g/kg supplementary groups(P<0.01), but dramatically lower in feed to gain ratio, implying a higher feed efficiency;1 g/kg compound probiotics supplementation increased dry matter apparent digestion(P<0.05) and 2 g/kg supplementation increased protein digestion(P<0.05), but no difference was observed in neutral and acid detergent fiber degradation. 1 g/kg supplementary group was greater in serum total protein and globulin, but lower in albumin/globulin(P<0.05). Therefore, 1 g/kg compound probiotics supplementation in PTMR is better to improve the growth performance, feed efficiency and disease resistance of growing Hu sheep.