典型微量金属元素对铜绿微囊藻生长影响的研究

针对Cu、Fe、Zn的不同离子浓度对铜绿微囊藻生长的影响进行研究,以期为水体富营养化防治的进一步开展提供理论支持。试验采用BG11培养基,分别测定了3种微量金属在不同浓度下铜绿微囊藻细胞密度和细胞叶绿素a含量变化。结果表明:当Cu、Fe、Zn浓度分别为0.001、3~12、0.05 mg/L时,铜绿微囊藻生长最佳,且在最佳浓度范围内铜绿微囊藻对Cu、Fe、Zn的利用率与其生长状况呈明显的相关性。Cu、Fe、Zn在不同浓度范围对藻类光合作用的促进或抑制是影响其生长的主要因素。因此,控制水体蓝藻暴发时,除了调节氮磷以外,通过微量金属元素浓度的调节也可作为一条有效抑制蓝藻暴发的途径。

Study on influence of typical microscale metal elements on growth of microcystis aeruginosa

The paper studied the effects of copper (Cu), iron (Fe) and zinc (Zn) at different concentrations on the growth of microcystis aeruginosa so as to provide the theoretical support for the further control of the eutrophication of water body. The test took BG 11 medium and measured the algal density and cellular chlorophyll a at different concentrations of 3 typical microscale mental elements.The results showed that when the concentrations of Cu, Fe and Zn is respectively 0.001, 3-12 and 0.05 mg/L ,the maximal growth of microcystis aeruginosa is achieved.The growth of microcystis aeruginosa has a strong correlationship with the utilization of 3 metal elements and its growth situation.Cu, Fe and Zn in different concentration ranges can promote or inhibit the photosynthesis of algae and is the primary influence factors of algae growth. In control of the harmful cyanobacterial bloom in surface water body, it is also an effective approach to regulate the concentrations of microscale metal elements in addition to the regulation of nitrogen and phosphorus.