日粮中添加发酵饲料对育肥猪养分消化率及肠道菌群的影响

为研究日粮中添加不同水平的发酵饲料对育肥猪养分消化率及肠道菌群的影响,试验选用560头杜×长×大三元育肥猪(75.37±2.65)kg],根据体重、性别随机分为7组,每组5个重复,每个重复16头,对照组饲喂育肥猪日粮,试验组分别在育肥猪日粮中添加5%或10%的发酵饲料A、B、C,饲喂21 d后每组选5头育肥猪肛门采集新鲜粪便测定肠道菌群多样性;并在饲喂第29天和第30天,各组每个重复连续收集粪便混合后测定养分消化率。结果表明:日粮中添加发酵饲料对育肥猪粗蛋白质、能量和干物质的消化率没有显著影响(P>0.05),相比对照组,饲喂发酵饲料组的粗蛋白质消化率有所提高(最高组提高2.9%);同时肠道菌群中乳杆菌属丰度有所增加,表明在日粮中添加一定比例的发酵饲料可以改善育肥猪养分消化率和肠道健康。

Effects of different fermented feeds on nutrient digestibility and gut microflora of finishing pigs

This experiment was to study the effects of different fermented feeds on the digestibility and gut microbial diversity of finishing pigs.A total of 560 fattening pigs(75.37±2.65)kg]were randomly divided into 7 groups according to body weight and gender.Each group consisted of 5 pens and each pens had 16 pigs.All the animals were fed the fattening diet(control group),or fattening diets with 5%or 10%fermented feed A,B,C for 30 days,respectively.After 21 days of feeding,5 fattening pigs from each group were select to collect fresh feces to determine the intestinal flora diversity.On day 29 and day 30 of feeding,the feces from each group was collected and mixed to determine the nutrient digestibility.The results showed that the addition of fermented feed to the diet had no significant effect on the digestibility of the crude protein,energy and dry matter in fattening pigs(P>0.05).However,compared with the control group,the digestibility of crude protein from pigs fed fermented feeds was improved(<3%)and the relative abundances of Lactobacillus in the gut was increased.The results indicated that fermented feeds could improve nutrient digestibility and intestinal health of fattening pig.