The Effects of Water Depth on the Growth of Two Emergent Plants in an In-Situ Experiment

With the degradation of global lake ecosystem, aquatic plants are more and widely used in ecological restoration. The effects water depths on growth photosynthetic fluorescence characteristics two emergent (Typha orientalis Zizania caduciflora) were studied eutrophic Lake Gehu by in-situ experiments. results showed that depth had no significant effect germination plants. changed morphological Plant height, tiller number, leaf length, width, number leaf, root-shoot ratio decreased with increasing depth, whereas dead leaves increased depth. biomass was highest when 40 cm. Water a plant. Fv/Fm tended to decrease first then increase When 20 cm, ETRmax significantly higher than at other depths. These show suitable range for T. Z. caduciflora is 20–60 A deeper long time not conducive