廊坊地区池塘养殖用水主要为淡水。由于水资源缺乏,水质富营养化,易产生大量有害藻类,造成水质恶化,影响鱼虾的生长,甚至引起养殖中毒死亡,给鱼农带来很大的经济损失。廊坊地区水体中浮游生物主要有蓝藻、绿藻、硅藻、黄藻、金藻、隐藻等。其中蓝藻门生物量一直占优势,平均占71 Langfang pond water is mainly freshwater. Due to the lack of water resources, water eutrophication easily lead to a large number of harmful algae, resulting in deterioration of water quality, affecting the growth of fish and shrimp, and even cause death poisoning farming, fish farms bring great economic losses. The main plankton in the water body in Langfang are cyanobacteria, green algae, diatoms, xanthophylls, golden algae and cryptophytes. Among them, the biomass of cyanobacteria has always dominated, accounting for an average of 71%