本试验旨在研究江蓠渣发酵培养物对断奶仔猪生长性能和直肠微生物菌群的影响。试验选用28日龄健康断奶仔猪210头,随机分为7组,每组3个重复,每个重复10头。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加0.10%、0.25%和0.50%江蓠渣或江蓠渣发酵培养物的试验饲粮。结果表明:与对照组相比,江蓠渣对仔猪的生长性能没有显著影响(P>0.05);而江蓠渣发酵培养物能显著提高仔猪的平均日增重(P<0.05),显著降低料重比和腹泻率(P<0.05),并显著降低粪便的含水量和大肠杆菌数量(P<0.05)。其中0.10%试验组效果较好,与对照组相比,料重比和腹泻率分别降低了7.34%和52.86%(P<0.05);直肠中乳酸杆菌数量提高了45.73%(P<0.05),大肠杆菌数量降低了16.48%(P<0.05);粪便中的含水量和大肠杆菌数量也分别降低了12.63%和25.68%(P<0.05)。由此可见,饲粮添加0.10%江蓠渣发酵培养物能有效提高仔猪的生长性能,降低料重比和腹泻率,改善直肠中的微生物菌群。

This experiment was conducted to evaluate the effects of gracilari residue fermentation culture on growth performance and rectal microflora of weaned piglets. Two hundred and ten healthy 28-day-old weaned piglets were randomly allocated into 7 groups with 3 replicates per group and 10 pigs per replicate. Piglets in the control group were fed a basal diet, while the others in the experimental groups were fed the experimental diets supplemented with 0.10%, 0.25% and 0.50% gracilari residue or gracilari residue fermentation culture, respectively. The results showed that compared with the control group, gracilari residue had no significant effects on the growth performance of weaned piglets (P>0.05), however, gracilari residue fermentation culture could significant improved the average daily gain (P<0.05), and could significant decreased feed to gain and diarrhea rate (P<0.05), also could significant decreased water content and the quantity of Escherichia coli in the feces (P<0.05). Compared with control group, the experimental group with addition of 0.10% gracilari residue fermentation culture significantly decreased feed to gain and diarrhea rate by 7.34% and 52.86%, respectively, and significantly increased the quantity of Lactobacillus by 45.73% and decreased the quantity of Escherichia coli by 16.48% in rectum, also significantly decreased the water content and the quantity of Escherichia coli by 12.63% and 25.68% in the feces, respectively. In conclusion, dietary supplemented with 0.10% gracilari residue fermentation culture can improve the growth performance of weaned piglets, and decrease feed to gain and diarrhea rate, as well as improve the microbiota in the rectum.