The Study Of Adaptability Of Aquatic Plants And Cultural Medium In Hangzhou Area

Modern waterscape shows the harmonious relationship between the residential areas and nature. Aquatic plants are essential for waterscape scenery, and benefit the improvement and maintainance of water quality effectively. Besides, suitable ways of cultivation are not only convenient for constructing, but also keeping the water from being polluted by the soil. Therefore, it is of significant value in landscaping and ecological views to study the cultivation and application of aquatic plants. In this paper, 16 normally used aquatic plants were studied. We examined the effect of different cultivation ways and various medium on the growth of these plants. In addition, the relationship between water quality and such species and cultivation ways were also discussed. In the end, we evaluated the application status of water plants in Hangzhou landscape.The primary results of the research are as follows:1. The 16 water plants were planted in the pools binded up with the medium of peat. In contrast with the control, the plants were in good condition in peat, with strong roots and rapid sprouting buds. There was no difference between the treatments and the control. Although the number of leaves and branches was a little bit inferior to the plants in soil, the difference was ignorable. It indicated that the water plants were able to adapt to binding-up culture, and this cultivation way was available in the waterscape.2. The water plants growed normally with well developed roots in moss and peat. However, the growth came to a stagnation during the later period, which might due to lack of nutrients in water. While the biomass got a sharp increasement for the plants growed in soil. The trend of root active absorbing area was similar to the total root absorbing area, and the ratio of active absorbing area in any treatment was not reduced by the lack of nutrients. No significant difference was expressed.These two medium showed similar effects. It was proved that, moss and peat was theoretically suitable as soiless culture medium for water plants. It is still needed to be further tested in nutrient water.3. Under different treatments, the value of pH, EC, DO showed no siginificant difference. In the early period of binding-up, except for Nymphaea tetragona, the pH was lower than the control, and the EC had an opposite result. DO decreased as the growing of plants. The water consumption was consistent with the growth situation, and during the hot season, the binding-up plants had lower water consumption.