[目的]在野外自然环境下研究微囊藻毒素3种异构体与环境因子的关系.[方法]应用高效液相色谱,对北方某水库5个采样点水体中微囊藻毒素3种异构体(MC-LR、RR和YR)进行了为期1年的监测,研究3种异构体与环境因子的相互关系.[结果]3种异构体均与叶绿素a呈现正相关关系；LR和YR异构体均与水温呈显著线性正相关,但是RR异构体与水温的相关性不明显;LR和YR异构体与总氮、硝酸盐氮和有机氮的相关性比较显著,而RR异构体只与硝酸盐氮存在显著负相关关系；LR和RR均与总磷和有机磷呈现显著正相关,而磷对YR异构体的影响相对较小,它们之间的相关性不明显.[结论]研究了微囊藻毒素3种异构体与叶绿素a、水温及氮、磷等环境因子的关系,并初步分析了其原因,对控制水体蓝藻的生长和毒素合成有一定的意义.%[Objective] The relationship between three isomers of microcystins and environmental factors were studied in the fields. [ Method] Three isomers of microcystins (MC-LR, RR and YR) in water of five sampling spots in a northern reservoir were observed for one year with High Performance Liquid Chromatography analytical method in order to study the relationship between three isomers and environmental factors. [ Result] The three isomers of microcystins showed positive correlation with chlorophyll a; LR and YR isomers all had significant linear positive correlations with the water temperature, but the RR isomer showed no significant correlation with the water temperature; LR and YR isomers had relatively significantly correlation with the contents of total nitrogen, nitrate nitrogen and organic nitrogen, while the RR isomer only showed a significant negative correlation with the content of nitrate nitrogen; LR and RR isomers both showed significant positive correlations with the contents of total phosphorus and organic phosphorus, while the phosphorus hardly affected the YR isomer and showed no evident correlation. [ Conclusion] The relationship of three isomers of microcyslins and environmental factors such as chlorophyll a, water temperature, nitrogen, phosphorus were studied and the reasons were investigated, which might offered a reference for controlling the growth of blue algae in water and toxin synthesis.
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