Abstract: Two hundred and forty 1-d-old Arbor Acres broiler chicks were randomly divided into four groups each including 60 broilers. The four groups were respectively fed with adding 0.0% inulin, 0.3% inulin, 0.1% bacillus and 0.3% inulin + 0.1% bacillus in broiler diets. On 21 and 42 day, the number of cecal bacteria was detection by Counting bacteria method and ammonia of broiler??s fecal excreted was measured by Nessler??s reagent method. The resultsshowed that on 21 day, the addit ion of inulin and bacillus to broiler diets decreased the number of E. coli and Salmonella, especialy in the adding 0.3% inulin + 0.1% bacillus group, but there was no significant variat ion in the amounts of aerobic and Lactobacillus; On 42 day, the action of making the number of E. coli and Salmonella decreased was moresignificant than 21 day, though the quantity of aerobic didn??t vary, the amount of Lactobacillus was increased, whicould make microflora system better. Furthermore the adding of inulin and bacillus to broiler diets could reduce dissem-ination of ammonia in excretion of broilers, especialy in the adding 0.3% inulin + 0.1% bacillus group, which wasbenefit for improving hen house environment.

Key words: Dahlin, Bacillus subtilis , Intestinal flora quant ity, Ammonia

CLC Number: 

• S858.31