Effects of Sediments Nutrition Status on the Growth of Potamogeton crispus

A laboratory incubation experiment was performed to study the effects of three trophic level sediments with different nutrition status on the growth including physiological characteristics of Potamogeton crispus by embedding and suspension cultivation ways. The results showed: The high trophic level (HC) sediment was favorable for the early growth and the photosynthesis of Potamogeton crispus but unfavorable for the growth of roots. During the experiment, the POD activity rapidly increased to a maximum value under highly nutritious substrate in embedding groups. Later in the experiment, the content of soluble protein and chlorophyll decreased in the embedding group with HC sediments. To some extent, the normal growth of Potamogeton crispus was inhibited, while there wasn’t an apparente phenomenon that the decline of Potamogeton crispus.