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The frequent outbreaks of harmful algal blooms has become a worldwide environmental disasters . Algicidal bacteria as the water biological control may have attracted the attention of many scholars at home and abroad . Wuhan eutrophication pond sampling point , the the improved medium Act separated the four dissolved Microcystis aeruginosa bacteria , No. A1 , A3, A4 , A5 , respectively . Determination by Gram staining , colony morphology characteristics and physiological and biochemical indicators , including strains A3 , A4 was identified , belong to the Serratia and Micrococcus . Experimental results show that : the algicidal effect of strain A1 , A4 dissolved algae are better , 10 ~ 8CFU concentration , respectively, after four days , two days lysis of algal cells , while strain A3 , A5 alginolyticus less effective , only part of the algal cells can be killed , only to a certain extent on the inhibition of the growth of the algal cells ; alginolyticus algicidal bacteria A1 , A3, A4 , A5 through direct way alginolyticus ; range in the algicidal on , a wider range of alginolyticus strains A4 , the narrower range of other three algae dissolved algicidal bacteria ; algicidal bacteria algicidal bacteria preserved , with yellow algae samples preserved easy algicidal bacteria activity maintained and preserved and longer . We also explore different algicidal bacteria mixed alginolyticus to find the best mix with algicidal bacteria , the experiments showed that : algicidal effect of strain A3 , A4 mixed flora , with monoclonal bacteria compared alginolyticus better . And strain A3 , A4 in different proportions mixed , its algicidal effect than those monoclonal bacteria algicidal effect was found through the colony plate counting method , strain A3, A4 are mixed in different proportions , after subculturing , the number of two bacteria ratio approaches to 1:10, this also shows that the strain A3 , A4 mixed flora have a certain degree of stability ; under different temperature and light conditions mixed flora algicidal effect than monoclonal alginolyticus bacteria more good ; alginolyticus mixed bacteria either through direct alginolyticus alginolyticus can also secrete some extracellular material , and this kind of material on the heat stability .
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