Effects of complex probiotics fermented feed without antibiotic on growth performance,plasma biochemical parameters,immune function and meat quality in growing-finishing pig

A total of 60 weaned piglets with an average weight of 18 kg were randomly divided into2 treatments,with 3replicates per treatment and 10 pigs per replicate.The control group was fed with basal diet supplemented with antibiotics and the experimental group was fed with 20%fermented feed without antibiotic for 154 days,to study the effects of complex probiotics fermented feed without antibiotic on growth performance,blood parameters,immune index and meat quality in growing-finishing pigs.The results showed that the performance of the experimental group fed with 20%fermented feed without antibiotic was better than the control group.Compared with the control group,the average daily feed intake increased by 5.86%,average daily gain increased by 10.89%and feed conversion ratio decreased by 4.38%(P0.05)in the experimental group.The content of serum aspartate aminotransferase,serum urea,serum albumin and ration of albumin with globulin in the experimental group were significantly lower(P0.05),while the content of serum alkaline phosphatase,glucose,globulin and IgG in the experimental group were significantly higher than that of the control group(P0.05).In addition,the slaughtered pork 45 min pH,2hpH,the red value(a*)and intramuscular fat of the experimental group were significantly higher(P0.05),while the value of slaughtered pork drip loss and shear force of the experimental group were significantly lower than that of the control group(P0.05).In conclusion,the fermented feed without antibiotic can improve the production performance,enhance immunity and improve meat quality in growing-finishing pigs.