Abstract: Test selection 16 wo duroc×landrace×big white 8-day-old grew up in three-way cross suckling piglets, according to birth date, litter size were randomly divided into four similar groups of four nests. The control group (Ⅰ) basic diet supple mented with 0.01% fed aureomycin, test group (Ⅱ,Ⅲ, Ⅳ) feeding basic diet supplemented with 0.01%, 0.05% and 0.10% of Bacillus subtilis, Bacillus subtilis on the study production performance of piglets. The results showed that Bacillus subtilis test feeding pigs with chlortetracycline compared with the control group, piglet average daily gain significantly increased the incidence of diarrhea have been reduced, Bacillus subtilis aureomycin in each group were higher than the control group; Bacillus subtilis with 0.10% added as the best, but all groups were no significantly different (P> 0.05). The conclusion of Bacillus subtilis on improving the production performance of piglets with good results, Bacillus subtilis was fully capable of an alternative feed chlortetracycline.

Key words: Bacillus subtilis; piglets; performance