Meng Y, Zhang D, Wang X, Zhu B
Health and Epidemic Preventive Station of Henan Province, Zhengzhou 450003, China.
Wei Sheng Yan Jiu. 1999 Mar 30;28(2):100-1.
Planktonic algae and microcystins (MCYST) were detected constantly in water sources of Zhengzhou City from 1996 to 1997. There is significant seasonal variation of the density of algae. The peak of algae occurring in February and December is about 1,068,000/L. The contents of MCYST in July, 1995 and in January, 1996 were over 200 ng/L. According to the Carlson's trophic state index(TSI), and indexes of total nitrogen, phosphorus, COD value and algae density, an eutrophication of water source having emerged in Zhengzhou is considered.
1996年至1997年期间，郑州市水源中持续检测到浮游藻类和微囊藻毒素（MCYST）。藻类密度存在显著的季节性变化。2月和12月出现的藻类高峰约为106.8万个/升。1995年7月和1996年1月微囊藻毒素的含量超过200纳克/升。根据卡尔森营养状态指数（TSI）以及总氮、总磷、化学需氧量值和藻类密度指标，认为郑州市水源已出现富营养化。
