产酶益生素对肉鸭生长性能及肠道菌群的影响

Effect of probiotic on the growth performance and intestinal microflora of meat ducks

目的产酶益生素对肉鸭生产性能及肠道菌群的影响,为开发利用产酶益生素提供理论依据。方法选用1日龄120只樱桃谷肉鸭,随机分为4组,每组30只,设2个重复,每重复15只,对照组I饲喂基础日粮,实验II、III和IV组分别在基础日粮中添加0.1%、0.2%和0.3%产酶益生素,测定肉鸭的生长性能及肠道菌群数量。结果与对照组相比,实验II、III和IV组平均日增重分别提高了5.82%、11.50%和12.60%,日均采食量分别提高了0.85%、1.71%和3.78%,料重比分别降低了4.85%、8.81%和7.93%;盲肠内双歧杆菌的数量分别提高了3.29%、9.86%和9.48%,乳酸杆菌分别提高了5.49%、10.98%和12.56%,大肠埃希菌分别降低了11.88%、16.35%和22.48%。结论产酶益生素能提高肉鸭的生产性能,促进肠道双歧杆菌及乳酸杆菌的增殖,降低大肠埃希菌的数量。

Objective To study the effect of enzyme-producing probiotic on the growth performance and intestinal microflora of meat ducks.Method 120 one-day Cherry Valley meat ducks were selected and randomly divided into four groups（30 meat ducks per group,2 replicates with 15 meat ducks in each）.The control group（group I） was fed with basal diet.The experimental groups II,III and IV were fed with basal diet containing 0.1%,0.2%,0.3% enzyme-produced probiotic respectively.Then detecting the growth performance and intestinal microflora quantity.Result Compared with control group,the average daily weight gain of experimental groups II,III and IV increased by 5.82%,11.50% and 12.60% respectively;the average daily feed intake increased by 0.85%,1.71% and 3.78% respectively;feed/gain ratio decreased by 4.85%,8.81% and 7.93% respectively.The amount of Bifidobacterium increased by 3.29%,9.86% and 9.48% respectively,Lactobacillus increased by 5.49%,10.98% and 12.56% respectively,while E.coli in caecum contents decreased by 11.88%,16.35% and 22.48%,respectively.Conclusion Probiotic can increase the growth performance,stimulate the proliferation of Bifidobacterium and Lactobacillus,decrease the amount of E.coli in caecum contents.