The effect of probiotic on production performance in finishing pig was studied with 40 PIC pigs (75 kg), which were randomly divided into four groups (A,B,C and D),and fed with basal diet,basal diet+antibiotic,basal diet+bacillus subtilis and basal diet+bacillus licheniformis,respectively.The trial lasted for 30 d.The results showed that the aver-age daily gain(ADG) and average daily feed intake(ADFI) in group B,C and D were 36.11%,45.83%,38.89%(P<0.05)and 5.22%,8.58%,7.84%(P 〉 0.05) higher than those of group A.The feed/gai...