不同添加水平的发酵豆秸对肉羊生长性能、屠宰性能及经济效益的影响

Effects of different levels of fermented soybean straw on growth performance,slaughter performance and economic benefits of mutton sheep

为探讨不同添加水平的发酵豆秸对肉羊生长性能、屠宰性能及经济效益的影响,试验选择体重相近的波尔山羊120只随机分为4个组,每个组3个重复,每个重复10只,1组饲喂基础日粮为对照组,试验2、3、4组分别用25%、50%、75%发酵豆秸替代青贮饲料,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组分别提高11.5%、9.7%(P <0.05),料重比较1组分别降低16.1%、12.7%(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3、4组的宰前活重、眼肌面积较1组分别提高14.3%、11.7%、21.8%、20.1%(P <0.05),GR值较1组分别降低15.9%、14.9%(P <0.05),试验2、3、4组的胴体重、屠宰率均高于1组(P> 0.05);(3)试验2、3、4组波尔山羊的毛利润均高于1组,试验3组毛利润最高,为199.12元/头。综上所述,50%的发酵豆秸替代青贮饲料可以提高肉羊生长性能、屠宰性能及经济效益。

In order to explore the effect of different levels of fermented soybean straw on growth performance,slaughter performance and economic benefits of mutton sheep.120 Boer goats with similar body weight were randomly divided into 4 groups,3 replicates in each group,10 sheep perrepeat.One group was fed with basic diet as control group.The two,three and four groups were feed with 25%,50%and 75%fermented soybean straw instead of silage.The trial period was 56 days.The results showed that:(1)The average daily gain of groups 3 and 4 was 11.5%and 9.7%higher than that of group 1(P<0.05),the feed conrersion ratio of group 1 was 16.1%and 12.7%lower than that of group 1(P<0.05),the average intake of groups 2,3 and 4 was higher than that of group 1(P>0.05);(2)The live weight before slaughter and the area of eye muscle of groups 3 and 4 were 14.3%,11.7%,21.8%and 20.1%higher than that of group 1(P<0.05),and the GR value was 15.9%,14.9%lower than that of group 1(P<0.05).The carcass weight and slaughter rate of groups 2,3 and 4 were higher than that of group 1(P>0.05);(3)The gross profit of groups 2,3 and 4 was higher than that of group 1,and the highest gross profit was found in group 3,which was 199.12 yuan/head.To sum up:50%fermented soybean straw instead of silage could improve the growth performance,slaughtering performance and economic benefits of mutton sheep.