复合益生菌发酵玉米秸对杂交肉羊生长性能、养分表观消化率及经济效益的影响

Effect of corn straw fermented by compound probiotics on growth performance,apparent nutrient digestibility and economic benefit of crossbred sheep

为研究复合益生菌发酵玉米秸对杂交肉羊生长性能、养分表观消化率及经济效益的影响,试验选择体重相近、健康的杂交肉羊60头随机分成4组,每组15个重复,每个重复1只,1组为对照组饲喂基础日粮,试验2、3、4组分别用25%、50%、75%复合益生菌发酵玉米秸替代普通青贮饲料,预试验17 d,试验期56 d。结果表明:(1)试验3、4组平均日增重较1组比分别提高12.2%、14.3%(P<0.05),试验2、3、4组平均采食量均高于1组(P>0.05),试验3、4组料重比较1组比降低10.2%、19.0%(P<0.05);(2)试验2、3、4组干物质、钙、磷表观消化率均高于1组(P>0.05);试验3、4组的粗蛋白质、中性洗涤纤维、酸性洗涤纤维表观消化率较1组比分别提高10.3%、12.0%、4.8%、9.6%、16.2%、21.2%(P<0.05);(3)试验3、4组毛利润较1组比分别提高11.6%、23.4%。综上所述,75%复合益生菌发酵玉米秸替代普通青贮饲料可以提高杂交肉羊的生长性能、营养物质的养分表观消化率及经济效益。

In order to study the effect of compound probiotic fermentation of corn straw on the growth performance,apparent nutrient digestibility and economic benefit of crossbred sheep.60 crossbred sheep of similar weight and health were randomly divided into 4 groups,each group had 15 repetitions,each repetitions had sheep 1.Group 1 was the control group fed with basic diet,and groups 2,3 and 4 were added with 25%,50%and 75%compound probiotic fermented corn straw instead of common silage.The pre-test lasted 17 days and test period lasted 56 days.The results showed that:(1)The average daily gain of groups 3 and 4 was 12.2%and 14.3%higher than that of group 1(P<0.05),the average food intake of groups 2,3 and 4 was higher than that of group 1(P>0.05).(2)The apparent digestibility of dry matter,calcium and phosphorus of groups 2,3 and 4 was higher than that of group 1(P>0.05).The apparent digestibility of crude protein,neutral detergent fiber and acid washing fiber in groups 3 and 4 were 10.3%,12.0%,4.8%,9.6%,16.2%and 21.2%higher than that of group 1(P<0.05);(3)The gross profit of groups 3 and 4 was 11.6%and 23.4%higher than that of group 1.In conclusion,75%compound probiotic fermentation of corn straw instead of ordinary silage could improve the growth performance,apparent nutrient digestibility and economic benefits of hybrid mutton sheep.