发酵象草对努比亚山羊生长性能及其肠道微生物群落结构的影响

Effect of fermented Napier grass on growth performance,gut microbial community structure in Nubian goats

试验旨在探讨日粮中添加发酵象草对山羊生长性能和肠道微生物群落结构的影响。选取64只月龄和体重相近的努比亚山羊,随机分成4组,每组16个重复,每个重复1只羊。S-1组山羊饲喂精料补充料+青贮象草(1.0%微星一号生物菌剂+15%米糠发酵),S-2组山羊饲喂精料补充料+青贮象草(1.0%微星一号生物菌剂发酵),S-3组山羊饲喂精料补充料+青贮象草(1.0%青贮发酵剂发酵),C-4组(对照组)山羊饲喂精料补充料+新鲜象草。试验期60 d。结果显示,试验组山羊的平均日采食量高于对照组,S-1组山羊的平均日增重最高、料重比最低。试验组与对照组山羊的肠道菌群结构与组成差异较大。在门水平上,试验组有5个优势菌群门,对照组有4个优势菌群门;在属水平上,试验组有13个优势菌属,对照组有14个优势菌属。研究表明,饲喂发酵象草可提高努比亚山羊的生长性能,改变努比亚山羊肠道菌群丰富度和多样性。

The purpose of the experiment was to investigate the effect of adding fermented Napier grass to goat diet on growth performance and intestinal microbial community structure.A total of 64 Nubia goats of similar age and weight were randomly divided into four groups,with 16 replicates in each group and one goat in each replicate.Goats in group S-1 were fed with concentrate supplement+silage elephant grass(1.0%Microstar 1 bioagent+15%rice bran),goats in group S-2 were fed concentrate supplement+silage Napier grass(1.0%biological medium fermentation),and goats in group S-3 were fed with concentrate supplement+silage Napier grass(1.0%silage starter fermentation).Goats in group C-4(control group)were fed with concentrate supplement+fresh Napier grass.The experiment lasted for 60 d.The results showed that the average daily food intake of goats in test group were higher than that of control group.The average daily weight gain was the highest and the feed to gain ratio was the lowest of group S-1.The structure and composition of intestinal microbial were quite different between test groups and control group.At the phylum level,there were five dominant phyla in test groups and four in control group.At the genus level,there were 13 dominant genera in test groups and 14 in control group.The experiment indicates that feeding fermented Napier grass can improve the growth performance and change the gut flora richness and diversity in Nubian goats.