不同培养条件下扰动对两种淡水藻生长的影响

研究了单种和按1∶1配比混合培养条件下,不同扰动强度对铜锈微囊藻和斜生栅藻生长的影响,结果表明:在试验所模拟的扰动强度范围内,较小的扰动有利于藻类的生长和聚集,单独培养的微囊藻和栅藻均在扰动强度为90r/min时藻比增长率最大;当转速大于该值时,随着扰动强度的加大,藻比增长率呈现下降趋势。在共培养体系中,铜锈微囊藻的比增长率均大于单独培养时的比增长率,且在扰动强度为90r/min时最大;栅藻由于竞争能力较弱,生长能力受到微囊藻的抑制,其生长状况明显劣于单独培养时的情况,且比增长率大大减小。

Disturbance Effect on Growth of Two Species of Algae under Different Culture Conditions

This paper relates to a study of disturbance effect on growth of two different algae (Microcystis aeruginosa, Scenedesmus obliqnus) and the competitive capacity of each alga when in mixed culture. The study shows that each of the alga grows faster under the condition of pure culture when disturbance enhances within a certain degree of 90rpm and that growth rate of Scenedesmus obliqnus is restrained by Microcystis aeruginosa under mixed culture condition.