Distribution and accumulation characteristics of nitrogen and phosphorus of 16 species of plants on ecological floating-bed
Keywords:Floating bed; nitrogen; phosphorus; distribution characteristics; accumulation effect;
The distribution and accumulation characteristics of total nitrogen (TN) and total phosphorus (TP) in the aerial and underground parts of 16 species of plants on ecological floating-bed were studied, and showed significant differences. The TN contents in the aerial part and underground part were 1.09%-2.91% and 0.68%-2.22%, respectively. The TN contents in the aerial and underground parts of Dracaena sanderiana were both the highest among the 16 species of plants. The TP content in the aerial part ranged from 0.15% to 0.45%, and in the underground part ranged from 0.12% to 0.76%, respectively. The TP contents in the aerial part of Dieffenbachia picta was the highest, while in the underground part of Anthurium andraeanum was the highest. Translocation factors of 14 species of plants for TN were greater than 1, and 12 species of plants for TP were greater than 1, respectively. Arundo donax var. versicolor which had considerable absolute accumulation of TN and TP both in the aerial and underground parts, can effectively remove nitrogen and phosphorus from water, will be a promising potential plant in applying of ecological floating-bed technology.