Effects of sediments nutrition condition on the growth and the photosynthesis of Hydrilla verticillata

A culture experiment was conducted to study the effects of three kinds of sediments with different nutrition status on the growth and the photosynthesis of Hydrilla verticillata in the laboratory.The results showed:(1)the sediment(HH)with the highest nutrient could accelerate the growth and the photosynthesis of Hydrilla verticillata in early growing stage,but at high temperature season it could decrease root vigor and chlorophyll content of Hydrilla verticillata,and affect later growth of Hydrilla verticillata.(2)The TR sediment with lower nutrition level inhibited the biomass accumulation of Hydrilla verticillata.(3)The HK sediment could provide enough nutrition for Hydrilla verticillata,and it was favorable for the growth and the photosynthesis of Hydrilla verticillata at high temperature season.Relative analyses indicated that nutrition status of sediment is very important for the growth of Hydrilla verticillata.