复合益生菌制剂对肉牛生长性能、屠宰性能及经济效益的影响

为研究不同水平的复合益生菌制剂对肉牛生长性能、屠宰性能及经济效益的影响,试验选择体重(200±4)kg肉牛60头随机分成4组,每组15个重复,每个重复1头,1组饲喂基础日粮为对照组,试验2、3、4组分别添加2.5%、5.0%、10%复合益生菌制剂,预试验7 d,试验期为56 d。结果表明:(1)试验3、4组的平均日增重较1组比分别提高19.4%、18.1%(P<0.05),试验3、4组料重比较1组比分别降低9.6%、7.2%(P<0.05),试验2、3、4组的平均采食量均高于1组(P>0.05);(2)试验2、3、4组的胴体重、屠宰率均高于1组(P>0.05),试验3、4组的宰前活重、眼肌面积较1组比分别提高10.3%、9.0%、14.3%、13.9%(P<0.05);(3)试验2、3、4组试验肉牛的每千克增重成本均低于1组,试验3、4组每千克增重的饲料成本分别减少1.0元和0.77元。综上,不同水平复合益生菌制剂的添加可以提高肉牛的生长性能、屠宰性能及经济效益,以5.0%添加为适宜。

Effect of compound probiotics on growth performance,slaughter performance and economic benefit of beef cattle

In order to study the effects of different levels of compound probiotics on growth performance,slaughter performance and economic benefits of beef cattle.60 beef cattle weighing(200±4)kg were randomly divided into 4 groups,each group had 15 repetitions,and each repetitions had 1 cattle.Group 1 was fed basic diet as control group.Groups 2,3,4 were added with 2.5%,5.0%and 10%compound probiotics respectively for 7 days,and the trial period was 56 days.The results showed that:(1)The average daily gain of groups 3 and 4 was 19.4%and 18.1%higher than that of group 1(P<0.05),the ratio of feed to gain of groups 3 and 4 was 9.6%and 7.2%lower than that of group 1(P<0.05),the average feed intake of groups 2,3 and 4 was higher than that of group 1(P>0.05);(2)The carcass weight and slaughter rate of groups 2,3 and 4 were higher than that of group 1(P>0.05),the live weight and eye muscle area of groups 3 and 4 were 10.3%,9.0%,14.3%,13.9%higher than that of group 1(P>0.05).(3)In groups 2,3 and 4,the cost of gain per kilogram of beef cattle was lower than that of group 1.The cost of feed per kilogram of gain in groups 3 and 4 was decreased by 1.00 yuan and 0.77 yuan respectively.The conclusion indicated that the addition of different levels of compound probiotics could improve the growth performance,slaughter performance and economic benefits of beef cattle,and 5.0%was suitable.