复合乳酸菌对育肥羊生长性能、养分消化率及屠宰性能的影响

Effects of compound lactic acid bacteria on growth performance,nutrient digestibility,and slaughtering performance of fattening sheep

文章旨在研究复合乳酸菌对育肥羊生长性能、养分消化率及屠宰性能的影响,试验将120只初始体重相近[(33.16±2.53)kg],健康无病的育肥期小尾寒羊随机分为4组,每组3个重复,每个重复10只。各组育肥羊分别采用基础日粮+0、50、100、150 g/t的复合乳酸菌饲养,试验为期60 d。结果表明:(1)100、150 g/t复合乳酸菌组育肥羊的60 d体重、31~60 d平均日增重显著高于0 g/t复合乳酸菌组(P<0.05),0g/t复合乳酸菌组育肥羊的1~30 d、31~60 d、1~60 d料重比显著高于100、150 g/t复合乳酸菌组(P<0.05)。(2)100、150 g/t复合乳酸菌组干物质消化率显著高于0 g/t复合乳酸菌组(P<0.05),50、100、150 g/t复合乳酸菌组粗蛋白质、酸性洗涤纤维消化率显著高于0 g/t复合乳酸菌组(P<0.05)。(3)100、150 g/t复合乳酸菌组育肥羊宰前活重、胴体重显著高于0 g/t复合乳酸菌组(P<0.05),100 g/t复合乳酸菌组育肥羊的眼肌面积显著高于0 g/t复合乳酸菌组(P<0.05)。结论:复合乳酸菌能提高育肥羊生长性能、养分消化率,改善屠宰性能,从饲养经济效益考虑,复合乳酸菌的适宜添加量为100 g/t。

In order to study the effects of composite lactic acid bacteria on the growth performance,nutrient digestibility,and slaughter performance of fattening sheep,120 healthy and disease-free fattening period small tailed Han sheep with similar initial weight[(33.16±2.53)kg]were selected for the experiment,Which were randomly divide into 4 groups with 3 replicates per group,with 10 replicates per replicate.Each group of fattening sheep was fed with a basic diet supplemented 0,50,100,and 150 g/t of composite lactic acid bacteria,and the experiment lasted for 60 days.The results showed that:(1)The body weight and 31~60 day average daily gain of fattening sheep in the 100,150 g/t composite lactic acid bacteria group were significantly higher than those in the 0g/t composite lactic acid bacteria group(P<0.05).The feed to weight ratio,31~60 day feed to weight ratio,and 1~60 day feed to weight ratio of fattening sheep in the 0 g/t composite lactic acid bacteria group were significantly higher than those in the 100 g/t composite lactic acid bacteria group and 150 g/t composite lactic acid bacteria group(P<0.05).2)The dry matter digestibility of the 100 g/t composite lactobacillus group and the 150 g/t composite lactobacillus group was significantly higher than that of the 0 g/t composite lactobacillus group(P<0.05),while the crude protein and acid washing fiber digestibility of the 50 g/t composite lactobacillus group,100 g/t composite lactobacillus group,and 150 g/t composite lactobacillus group were significantly higher than that of the 0 g/t composite lactobacillus group(P<0.05).3)The live weight and carcass weight of fattening sheep in the 100 g/t composite lactobacillus group and 150 g/t composite lactobacillus group were significantly higher than those in the 0 g/t composite lactobacillus group(P<0.05),and the eye muscle area of fattening sheep in the 100 g/t composite lactobacillus group was significantly higher than that in the 0 g/t composite lactobacillus group(P<0.05).Conclusion:Compound lactic acid bacteria can improve the growth performance,nutrient digestibility,and slaughter performance of fattening sheep.Considering the economic benefits of feeding,the appropriate amount of compound lactic acid bacteria added is 100 g/t.