鱼塘施放光合细菌条件下浮游植物的变动

Variation of Phytoplankton Feeded with Photosynthetic Bacteria in Fish Ponds

鱼塘泼施光合细菌后浮游植物种类组成及生物量均发生变化．试验表明，泼施光合细菌之后，夏季鱼塘中蓝藻类的过量增殖受到限制；绿藻、硅藻等藻类种类数及生物量明显增加；优势种群中，鱼类适口性的藻类种类增加，有害种类减少．导致浮游植物种群变化的主要原因，是由于光合细菌在严重营养化的鱼塘中具有明显优化水域环境的作用．

The species composition and the biomass of phytoplankton varied whenfeeded with photosynthetic bacteria in fish ponds. The experiment results showed thatthe growths of blue green algae in the summer were effectively restricted;the number ofspecies and the biomass of other algae, such as green algae, diatom, were increased; thenumber of species favoared the ingestion of fishs in dominant species was increased, butthe number of adverse algae species was decrased. The affecting factors on the variationof phytoplankton were also discussed in this paper.