The content of sulphate reducing bacteria(SRB) in the sediment on the east side of Beibu Gulf was determinated by using the most probable number (MPN) method.

• 用MPN（theMostProbableNumber）法测定了北部湾东侧沉积物硫酸盐还原菌（SRB）含量，表层沉积物SRB的检出率约76.；3%25。