Effects of Acidification Treatment at the Stable Breading Phase on the Growth of Microsystis aeruginosa

摘要

With the development of our society,the fast growths of population,unreasonable exploitation and utilization of lake resource have been making the problem of lake pollution worse and worse.The cyanobacteria outbreak,especially Microsystis aeruginosa outbreak,is the main character of lake pollution.In order to explore a new approach to resolve this problem,the effects of various acid conditions of culture medium and acidification treatments at the stable breading phase of Microsystis aeruginosa on the growth of Microsystis aeruginosa have been studied by aerating CO2 to the culture medium to change the medium pH and keeping the acid condition as unchangeable as possible in the process of culturing at the stable breading phase of Microsystis aeruginosa.As a result,the inhibition effects of acidification treatment on the growth of Microsystis aeruginosa were not remarkable when acidification treatment started from the stable breading phase of Microsystis aeruginosa.The growth of Microsystis aeruginosa was inhibited to a certain extent under the conditions of pH 6.0 and pH 5.5,and the maximum decrements of the chlorophyll-a at pH 6.0 and pH 5.5 reached to 9.83％,24.03％ respectively.However,the acid condition of pH 6.5 had no contribution to the inhibition of the growth of Microsystis aeruginosa.