Application Of Mannose-oligosaccharides And Antimicrobial Peptides In Meat Muscovy Production

Mannanoligosaccharides(MOS) and Antimicrobial Peptides are novel feedadditives up to date. They are all potential substitutes of the common antibiotics. Effectsof MOS and Antimicrobial Peptides on the meat muscovy duck performance, intestinalbacterial colonies and several blood indexes were determined and compared in order todetermine effectiveness of these two additives as substitutes of antibiotics.600 muscovy female ducks of 1-day old were randomly assigned to 5 groups, with4 replications each group, 30 ducks each replication. Group 1 was provided with basaldiet without any antibiotics; Group 2 was provided with one kind of antibiotics+aureomycin 50mg/kg; Group 3 was provided with MOS (1g/kg);Group 4 was providedwith antimicrobial peptides (7ml/kg);Group 5 was provided with MOS (1g/kg)+antimicrobial peptides (7ml/kg); All ducks were fed their respective diets from 1-day to56-day. Body weight was recorded at 1-day and 56-day.All ducks were individuallyilnmuned with Avian Influenza and Duck Plague bacterin at 15-day and 28-day.And theantibody level of the Avian Influenza virus was determined at 28-day. At 56-day, twobirds of each replication were selected to phlebotomize. And after that, the birds wereslaughtered, the escherichia coli and bifidobacterium concentration of the appendicescontent were determined in the laboratory. The results were as follows:1. During the whole experiment period, group 1 has the lowest survival rate whilegroup 4 and group 5 has the highest. Compared with Group 1, group 4 and 5 hassignificant improvements on survival rate (P＜0.05). And they has no significant improvements on survival rate than others (P＞0.05).2. These two kinds of additives can promote the weight growth, solely or associatewith each other. Compared with Group 1 and Group 2, Group 5 had a significantimprovement on average body weight (P＜0.01). And group 5 also has a higher averagebody weight than other groups.3. Group 5 has lowest feed efficiency than other groups and different extremelybetween Group 5 and Group 1 (P＜0.01). Group 5 also has a significanct improvementon feed efficiency than other groups (P＜0.05). Group 3 has a lower feed efficiency thangroup 1, 2 and 4. The feed efficiency of Group 1 is higher than other Groups and has asignificant difference (P＜0.05).4. Group 4 has the lowest antibody level of the Avian Influenza virus, and group 2has the highest antibody level of the Avian Influenza virus, but there are no significanctdifference between groups.5. Antimicrobial peptide and MOS can decrease the escherichia coli in theintestines, with significant difference with Group 1 (P＜0.01);MOS can also increase thelactobacillus in the intestines (P＜0.01). So it can be concluded that the MOS can helpthe duck regulate its intestinal bacterial colonies by decrease the harmful flora andincrease the wholesome flora.6. Both the compatibility use of MOS and antimicrobial peptide had a goodperformance in the performance trait, intestinal bacterial colonies and several bloodindexes.