Effects Of Mixed Culture Solid Fermentation Feed On The Performance, Serum Index And Immune Globulin In Growing Pigs

Two experiments were designed to study the effects of mixed culturesolid fermentation feed on the production performance, serum index and immuneglobulin in growing pigs.Experiment1: conditons of solid state fermentation with mixed bacteria andenzyme on soybean meal and soybean meal+cotton meal were studied in the trial PH,soluble protein content, soluble protein content, volatile base nitrogen content as themain evaluation index, study bacteria solid-state fermentation, composite Resultsshowed that the compound enzymes and bacteria fermentation results better thanbacteria fermentation results alone, the best fermentation conditions as follows: theratio of material to water while5, quantity of0.2%, with enzyme quantity0.02%,35℃fermentation temperature, fermentation time of72h. Under this condition, thefermentation substrate processed, its PH value dropped by22.4%, acid soluble proteincontent and soluble protein content increased by48.6%and54%respectively, greatlyincreases the small molecular protein content.Experiment2:128growing pigs in good health and having similar weight wereselected, then divided them into4treatments randomly with4replicates and8weanedpiglets per replicate. The Transition before the experiment was5days, and theexperiment lasted21days. The control group was fed based diet.All diets wereformulated on the basis of corn-soybean meal diet according to the2012AmericanNRC swine nutrition guide. Results show that:(1) the mixed bacteria in solid statefermentation of growing pig feed average daily feed intake (ADFI), average daily gain(ADG) were significantly increased(P<0.05), material weight ratio compared withunleavened group has improved, but the difference was not significant(P>0.05).Bacteria (2feeding mixed solid fermentation feed can obviously reduce the incidencerate of growth, protein digestibility is also improved.(3) feeding mixed bacteriasolid-state fermentation feed can significantly increase the concentration of the IgA,IgM(P<0.05), and other protein levels diet has no effect on serum biochemical index. (4) feeding mixed bacteria solid-state fermentation feed can significantly lower thecontent of e. coli in the feces, significantly increase the content of lactic acid bacteria(P<0.05), but has no effect on yeast and bacillus.