阿特拉津对铜绿微囊藻和四尾栅藻生长的影响

Effects of Atrazine on Growth of Microcystis Aeruginosa and Scenedesmus Quadricauda.

在实验室内利用MA培养液培养，通过测定藻生长量和叶绿素a含量，研究不同浓度下的阿特拉津对铜绿微囊藻（Microcystis aeruginosa）和四尾栅藻（Scenedesmus quadricauda）生长的影响，并以藻细胞数表示的最大比生长率为指标，评价2种藻对阿特拉津的敏感性。结果表明，在0．001～5．000mg·L^-1质量浓度范围内，阿特拉津对铜绿微囊藻和四尾栅藻的生长表现出低浓度刺激、高浓度抑制的效应，且阿特拉津对四尾栅藻的刺激效应明显大于铜绿微囊藻。

Effects of concentration of atrazine on growth of Scenedesmus quadricauda and Microcystis aeruginosa cultured in MA medium were studied by determining growth rate and content of chlorophyll a in laboratory. With the maximum specific growth rate, expressed by count of algal cells as evaluation index, the two algae were compared in sensitivity to atrazine. When low in concentration, atrazine stimulated growth of Scenedesmus quadricauda and Microcystis aeruginosa; but when high, it demonstrated a reverse effect. And its stimulating effect was greater on Scenedesmus quadricauda than on Microcystis aeruginosa, whereas its inhibiting effect showed the other way.