Effects of probiotics and enzyme compound microbial preparations on laying performance,egg quality and antioxidant function of laying hens
Through analyze the effects of probiotics and enzyme compound microbial preparations on laying performance,egg quality,and antioxidant function of laying hens,providing scientific basis for the development of effective alternative feed antibiotics.A total of 315 Hailan brown laying hens of 30 weeks of age(healthy and with similar laying rate)were selected for the experiment and divided into control group,experimental group I and experimental group Ⅱ,with 5 replicates per group and 21 chickens per replicate.Laying hens in the control group were fed basal diet,while the experimental group I and experimental group Ⅱ were respectively supplemented with 0.5 g/kg and 1 g/kg probiotics and enzyme compound microbial preparations in the basal diet.The experimental period was 56 days,and the laying hens were free to eat and drink water.The results showed that:(1)Compared with the control group,the probiotics and enzyme compound microbial preparations group could increase the average egg weight by 2.47%and the laying rate by 2.76%maximally,while decrease the ratio of feed/egg by 1.97%,and all had significant effects(P<0.05),but there were no significant differences in average daily feed intake and unqualified egg rate(P>0.05);(2)Compared with the control group,the probiotics and enzyme compound microbial preparations group could increase the egg shell hardness by 8.46%and the egg shell thickness by 14.29%maximally,and all had significant effects(P<0.05),but there was no significant difference in Haugh unit and egg color(P>0.05);(3)Compared with the control group,the probiotics and enzyme compound microbial preparations group could increase the total antioxidant capacity(T-AOC)by 4.02%,the activity of catalase(CAT)by 8.64%,and the activity of superoxide dismutase(SOD)by 24.39%maximally,and all had significant effects(P<0.05),but there were no significant differences in glutathione peroxidase(GSH-Px)and malondialdehyde(MDA)(P>0.05);Adding a probiotics and enzyme compound microbial preparations of Bacillus subtilis,Enterococcus faecalis,Bacillus coagulans,and glucose oxidase to the diet could significantly improve the laying performance,egg quality,and antioxidant function of laying hens,and it was suggested feed addition of 1 g/kg,become one of the preferred schemes to substitute feed antibiotics.
probiotics and enzyme compound microbial preparationslaying henslaying performanceegg qualityantioxidant function
万方数据
维普
