鲢鱼放养控制北京城市河湖水华试验研究

介绍了利用鲢鱼控制北京城市河湖水华的试验研究,通过不同放养密度(0、17、51和103 g/m3)的现场围隔试验,对鲢鱼放养对水体水质和浮游生物的影响进行了分析.研究结果表明,鲢鱼放养使有鱼围隔中浮游生物量极低,从而使浮游植物基本不受浮游动物影响,而直接受鱼类影响;同时,中等密度(51 g/m3)的鲢鱼放养使水华蓝藻和微小藻的生长均得到了有效抑制,使藻类生物量最低.

Study on silver carp stocking for controlling water bloom in urban rivers and lakes of Beijing

This article introduces the study on water bloom controlling by silver carp in urban rivers and lakes of Beijing, analyzes the influence of stocking of silver carp on water quality and plankton through the in situ enclosure experiment with different stocking densities (0,17,51,103 g/m³). The results show that, stocking of silver carp make the zooplankton biomass very low in the enclosures with fish, thereby, make the phytoplankton affected by fish directly but not by zooplankton. At the same time, the middle density (51 g/m³) stocking of silver carp can effectively control cyanophyta and picophytoplankton growth, and make the algae biomass lowest.