Effects of Yeast Culture and Flavomycin on Finishing Pigs

The effects of yeast culture and flavomycin on pig were studied.64 healthy,three-way crossbred(Duroc×Landrace×Yorkshire) finishing pigs about 56kg were divided into 2 groups: control and experimental group,each group 32 pigs.Basic diet was prepared according to recent pig′s feeding standard in our country.The control group pigs were fed for basal diet supplemented flavomycin(20 mg/kg),the experimental group pigs for that supplemented 0.15% yeast culture.Formal feeding experiment period was 40 days.Feeding experimental results were as follow.①The frequencies of diarrhea pigs in the control group were 4 and the pigs in the experimental group were healthy.②The average daily gain of pigs in the experimental group was markedly higher than those in the control group(P0.05).③IgG concentration in serum of pigs in the experimental group was greatly higher than that in the control group(P0.01).The antibody against swine fever in serum of the pigs in the experimental group was higher than that in the control group(P0.05).The GPT,GOT activities in serum of the pigs in the experimental group were markedly lower than those in the control group(P0.05).P in serum of the pigs in the experimental group pigs was higher than that in the control group(P0.05),Glu in serum of the pigs in the experimental group was lower than that in the control group(P0.05),but TP,UN,TG,vLDL,Ca,Mg,antibody against foot-and-mouth disease and circovirus disease in serum of two group pigs had no remarkable differences(P0.05).④The back-fat thickness and diameter of muscle fiber of the experimental group pigs were lower than the control group(P0.05);but pH,color,marbling,drip loss,EE,glycogen in back muscle of two group pigs have no significant differences(P0.05).Based on above results the conclusion was made: comparing with flavomycin,yeast culture promoted growth and guaranteed health of pigs more markedly,and improved nutritively biochemical metabolism at various degree.