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Effect of Dietary Seaweed Powder and Antibacterial Peptides on Growth Performance,Immune Organs Index and Intestinal Microflora of Broilers
Author(s): 
Pages: 170-177
Year: Issue:  2
Journal: Acta Laser Biology Sinica

Keyword:  broilerseaweed powderantibacterial peptidesgrowth performanceimmune organs indexintestinal microflora;
Abstract: The aim of this study was to explore different levels of dietary seaweed powder and antibacterial peptides on growth performance,immune organs index and intestinal microflora of broilers.A total of 504 AA chickens with similar weight were randomly divided into 7 groups,with 6 replicates of 12 chicks in each replicate.Control group was fed with basal diet,experimental groups were added different dietary levels of seaweed powder(1 .0%,3 .0%,5 .0%)and anti-bacterial peptides (300 mg/kg、600 mg/kg).The experiment lasted for forty-two days which was divided into earlier stage(1 ~21 d)and later stage(22~42 d).Results indicated:(1)The supplementation of dietary seaweed powder hadsignificant effects on feed gain ratio in early,late and the whole period (P<0.05);Spleen index and thymus at 21 days of age and bursal index at 42 days of age had significant effect (P<0.05);E.coli and Lactobacillus in cecum of broiler had significant differences at 21 days of age and 42 days of age(P<0.05).(2)The supplementation of dietary antibac-terial peptides had significant effects on feed gain ratio in the late and the whole period (P<0.05 );Spleen index and thymus at 21 days of age and bursal index at 42 days of age had significant effect (P<0.05);E.coli and Lactobacillus in cecum of broiler had significant differences at 21 days of age and 42 days of age(P<0.05).(3)Interaction between seaweed powder and antibacterial peptides had significant effects on feed gain ratio in early,late and the whole period (P<0.05);Spleen index and thymus at 21 days of age and bursal index at 42 days of age had significant effect (P<0. 05);E.coli and Lactobacillus in cecum of broiler had significant differences at 21 days of age and 42 days of age(P<0.05 ).It was concluded that seaweed powder and antibacterial peptides interaction had a significant effect on the growth,immune organs index and intestinal microflora of broiler.The suitable level of dietary is 5% seaweed powder and 300mg/kg antibacterial peptides respectively during the whole period.
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