3种观赏植物对冬季富营养化景观水体的净化效果

在冬季低温条件下，以红梗叶甜菜、羽衣甘蓝、红花石蒜3种观赏植物为试材，制成植物浮床，研究3种植物以及无植物浮床对城市景观污染水体中氮、磷的净化效果，试验共持续60d。结果表明：在冬季低温条件下，3种植物在富营养化水体中均生长良好，红梗叶甜菜、羽衣甘蓝、红花石蒜对水体中TN的去除率分别为64.0%，53.0%和32.9%，远高于对照组的去除率（20.04 %），3种植物对水体中NH3-N的去除率分别为93.1%，88.4%，75.3%，去除率显著大于对照组。本研究为冬季浮床植物的选择提供了依据。

Purified Efficiency of Phosphorus and Nitrogen from Eutrophicated Landscape Water by Three Floating Ornamental Plants in Winter

To select suitable plants for use in purified eutrophicated landscape water in winter, three kinds of ecological floating beds were made of Beta vulgaris, Brassica oleracea var.acephala, Lycoris radiata , respectively, to study their effects on removing nitrogen and phosphorus from eutrophicated landscape water under lower temperature condition in winter. The experiment lasted 60 days. The results indicated that three ornamental plants were adaptable to grow in the eutrophicated landscape water. Three plants had good removal effects on the CODCr、TN、TP、and NH3-N, which were higher than the control treatment. The removal rates of N byBeta vulgaris, Brassica oleracea, Lycoris radiata were 64.0%, 53.0%, 32.9%, respectively, all of which were higher than the control （20.04%）. The removal rates of NH3-N were 93.1%, 88.4%, 75.3%, espectively. The investigation will offer a reason for the choice of floating bed plant in winter.