焦性没食子酸抑藻效应及其模型分析

Inhibitory effect of pyrogallic acid on Microcystis aeruginosa and the model analysis

目的寻找能有效抑制水华蓝藻的物质,并根据其抑藻效应建立相应的预测模型。方法在室内控制条件下,采用不同浓度焦性没食子酸抑制最常见水华蓝藻铜绿微囊藻,并根据抑藻效果,在传统的Logistic模型基础上进行拟合,建立化感物质抑藻时的数学模型。结果 (1)焦性没食子酸对铜绿微囊藻具有非常显著的抑制效应,在实验的藻密度范围内,其第5天的半抑制浓度(EC50)为0.658mg/L;(2)拟合的数学模型能有效分析和预测焦性没食子酸在一定浓度范围内抑藻时藻密度随时间变化的规律,还可预测不同时间节点上,焦性没食子酸抑藻的EC50、最小有效浓度(MIC)。结论焦性没食子酸具有开发成生物除藻剂的潜质,所拟合的数学模型对于指导利用化感物质抑藻具有一定的参考应用价值。

Objective To explore the effective agent to inhibit the growth of waterbloom algae and establish corresponding forecast model based on the inhibitory effect. Methods The inhibitory effect of pyrogallic acid at different concentrations on Microcystis aeruginosa was studied in the indoor control conditions and the mathematical model of algal growth inhibition was established based on the traditional Logistic model. Results （1） Pyrogallic acid has strong power to inhibit the growth of Microcystis aeruginosa, the ECso of the fifth day was 0. 658mg/L. （2） The law of algal density changing with time can be effectively analysed and forecasted by this model, and based on this model, the half effective concentration （ ECs0 ） and the minimal inhibitory concentration （ MIC ） at different time point also can be projected. Conclusion This experiment indicated that pyrogallic acid had some potential to be developed into biological algicide agent, and the mathematical model has some reference application value for using allelochemicals to inhibit the growth of water-bloom algae.