Growth and Nutrition Removal of Salix matsudana Clone Seedlings in Eutrophic Water

Objective  The aim of the study was to screen out the proper clones for eutrophication treatment. Method  A riparian plant-based wastewater treatment was carried out to investigate the plant growth, nutrient uptake, and nutrient removal efficiency of eight Salix matsudana clones in eutrophic water.Result  S.matsudana grew good during the experiment, and had no phenomenon of death. At the end of experiment, the height, biomass and relative growth rate were significantly different among the clones of S. matsudana. Clone 59 and 97 were performed best among the clones. The results indicated that S. matsudana could accumulate high concentration of N and P in above-ground tissues under conditions of abundant supply. The concentration of nitrogen and phosphorus in the treated eutrophic water decreased during the experiment. The total nitrogen, ammonia and nitrate nitrogen removal rates were from 87.17% to 96.94%, 90.35% to 99.33% and 66.66% to 88.19%, respectively. The removal rate of phosphorus was from 76.59% to 83.15%. The nutrition removal rates of S. matsudana clone 13 were higher than that of other clones. Conclusion  The approach of clone characterisation used here rapidly generated a high quantity of growth-physiological information on clone performance and characteristics under eutrophication conditions. According to the results, S. matsudana clone 13, 59, and 97 which performed good under the eutrophication condition, had great potential application for water purification in remediation of eutrophic water bodies.