中文摘要：

为探索富营养化水体中蓝藻＂水华＂的形成机理,研究不同光照条件下水流对铜绿微囊藻生长的影响.采用小型有机玻璃环形槽模拟不同水流,在恒温、无菌条件下进行,对比研究了两种光照强度（2 500lx和3 500lx）下的差异.结果表明：在不同光照条件下,水流改变了微囊藻的各个生长阶段,使微囊藻适应时间增加,对数生长时间延长,水流提高微囊藻的比增长速率,直接影响微囊的生物量;水流对微囊藻的影响与光照强度有关,在光照强度为2 500lx时较光强为3 500lx时更利于微囊藻的生长,且均在35cm/s时最利于微囊藻的生长;微囊藻在2 500lx时各流速下微囊藻生长差异较大,而光照为3 500lx时微囊藻的生长在各流速下的差异较小;水流降低了微囊藻对光照强度的需求并提高了对光的利用。

英文摘要：

The effects of water flow under different light intensity on the growth of Microcystis aeruginosa were studied to elucidate the mechanism of water bloom. The experiment was conducted at a light intensity of 2 500 lx and 3 500 lx in a small perspex ring groove,which generated water flow under axenic condition and constant temperature and light. The results showed that the adaptation growth time of Microcystis aeruginosa increased, the exponent growth time was extended and the growth ratio was improved by water flow, which directly influenced the density of algae, and that the effects of water flow on the growth of Microcystis aeruginosa were related to light intensity. The light intensity at 2 500 ix was more conducive to the growth of Microcystis aeruginosa than that at 3 500 Ix, the opti- mal water flow was 35 cm/s both for the light intensity of 2 500 lx and 3 500 Ix. There were no significant differences among different water flow at the intensity of 2 500 Ix. Therefore, there are not significant differences at 3 500 ix. The light intensity requirement was decreased and the efficiency was increased by water flow.