复方中草药对吉富罗非鱼生长及肠道菌群的影响

将A、B、C三种复方中草药分别按质量分数1.5%的比例添加到罗非鱼商品饲料中,喂养初始体重约16.58±0.48g的吉富罗非罗28d,通过测定罗非鱼的增重率、饲料系数、肠道菌群等指标,研究三种复方中草药制剂对罗非鱼生长性能及肠道菌群的影响。结果显示:三种复方中草药制剂对罗非鱼的增重率、成活率、饲料系数等生长性能指标虽无显著影响(P>0.05),但与对照组相比,添加1.5%的复方中草药制剂C可使吉富罗非鱼的增重率提高10.82%,饲料系数降低4.71%,蛋白质效率提高15.68%;三种复方中草药制剂均可显著促进罗非鱼肠道细菌、双歧杆菌、乳酸杆菌的生长(P<0.05),C方中草药制剂还可显著抑制大肠杆菌生长(P<0.05)。结果表明,C方中草药制剂可显著促进罗非鱼肠道中乳酸杆菌等有益菌群的增殖,抑制大肠杆菌生长,从而有效促进罗非鱼生长。

Effeets of Chinese Herbal Medicine on Growth Performance and Intestinal Microfora of GIFT Strain of Nile Tilapia(Oreochromis niloticus)

Three kinds of Chinese herbal medicine (A, B, C) at 1.5% were added to the feeding stuff (control group). Four treatment groups were set up to feed GIFT strain of Nile tilapia with the average weight of (16.58±0.48 )g for 4 weeks. The effects of Chinese herbal medicine on the growth performance and intestinal microflora were investigated. The results showed that different treatments had no significant effect on the weight-gaining, survival rate, feed conversion (FCR), Protein efficiency ratio (PER) (P﹥0.05). But Compared with control group, the weight grain rate, Protein efficiency ratio (PER) in the group with Chinese herbal medicine C increased by 10.82%and 15.68% respectively, FCR increased by 4.71%. From the aspect of intestinal microflora, the number of intestinal bacteria, Bifidobacterium and Lactobacillus were significantly higher than the control group (P<0.05), the number of E. coli in the group with Chinese herbal medicine C was significantly lower than other groups (P<0.05). The research indicated that Chinese herbal medicine C could promote intestinal bacteria, Bifidobacterium and Lactobacillus proliferation, inhibited the growth of E. coli and had a good promotion effect on the growth of GIFT strain of Nile tilapia.