Abstract:

In order to research the three submerged plants’ absorption characteristics of phosphorus in Taihu Lake, the influences of three kinds of submerged vegetation Hydrllaverticillata, Ceratophyllumm demersum and Elodea nuttalli absorbing phosphorus under different nitrogen consistence and light intensity were investigated under indoors simulating conditions. The results showed that during the 11 days experimental time, three kinds of submerged vegetation absorbed total phosphorous in water effectively under natural light. The purification effect was Ceratophyllumm demersum>Hydrllaverticillata>Elodea nuttalli; The purification effect of the same submerged macrophytes was different under different nitrogen consistence, the removal rate of Hydrllaverticillata and Elodea nuttalli with 42.48% and 51.33% in 0 mg/L nitrogen consistence experiment respectively was the best, Ceratophyllumm demersum with 61.06% in 7 mg/L nitrogen consistence experiment was the best. The results showed that light intensity environmental factor had significant effects on the uptake rates of phosphorus. The purification effect of three kinds of submerged vegetation became lower in the dark.