【摘要】 研究了处理观赏用轻度富营养化水的人工湿地中植物的生长特性和氮磷去除作用。研究发现 ,所选用的 2 1种植物中 ,有17种植物在人工湿地中生长良好 ,稳定生长 10 5 d以后 ,其平均总生物量在 15 5～ 1317g/ m2之间 ,除了鸭跖草的地上地下生物量比 (A/ U)为 2 0 .5外 ,其余都在 1.18～ 4 .2 9之间。植株地上部 N和 P的浓度分别在 10 .99～ 34.74 mg/ g和 0 .5 9～ 3.81mg/ g之间 ;地下部 N和 P浓度分别在 6 .2 0～ 2 9.5 0 mg/ g及 0 .72～ 3.83mg/ g之间。大部分植物地上部 N和 P的浓度大于地下部 (p<0 .0 5 )。植物的 N、P积累量分别在 2 .10～ 2 4 .4 8g/ m2 和 0 .2 3～ 1.95 g/ m2 之间。在处理轻度富营养化水的人工湿地中 ,植物吸收对氮磷的去除起着主要作用——贡献率分别为 4 6 .8%和 5 1.0 %。植物的氮磷积累量与浓度及生物量之间均存在显著相关 ,所以可以直接以生物量为指标选择人工湿地植物。同时考虑净化和景观效果 ,可为处理城镇轻度富营养化水的人工湿地的植物选择提供参考更多还原

【Abstract】 Constructed wetland has been proven efficient technologies for both wastewater treatment and reuse of water resources. Compared with conventional treatment systems, it is inexpensive, and easily operated and maintained. An integrated vertical flow constructed wetland was built in Hangzhou Botanical Garden, Zhejiang Province, China, to purify eutrophic water from Jade fish-seeing pond. The present paper studied the growth characteristics of the plants and their ability to remove nutrient in this constructed wetland. Twenty-one species were introduced in the constructed wetland, including horticultural species and wild species, in which four species of Fatsia japonica, Avena fatua, Juncus effuses and Rumex japonicus were not suitable to this constructed wetland. Fatsia japonica couldn’t live in constructed wetland. Avena fatua and Juncus effusus grew weakly. Rumex japonicus had a much too short life history. Through 105 days, mean total biomass ranged from 155 to 1 317 g/m~2 for the other 17 plants. Except for Commelina communis, above/belowground biomass ratios of plants varied between 1.18 and 4.29. Aboveground concentrations of nitrogen and phosphorus ranged from 10.99 to 34.74 mg/g and from 0.59 to 3.81 mg/g, respectively. Belowground concentrations of nitrogen and phosphorus ranged from 6.20 to 29.50 mg/g and from 0.72 to 3.83 mg/g, respectively. The concentrations of nitrogen and phosphorus between above and belowground biomass differed significantly (p<0.05). Plant accumulations of nitrogen and phosphorus ranged from 2.10 to 24.48 g/m~2 and from 0.23 to 1.95 g/m~2, respectively. The results showed that plant uptake played a major role in nitrogen and phosphorus removal in this constructed wetland treating low eutrophic water. Its contribution was 46.8% and 51.0%, respectively. Plant accumulations of nitrogen and phosphorus displayed significant positive linear correlation with plant biomass and concentrations of nitrogen and phosphorus. So plant species for constructed wetland can be selected by biomass. In the present study, horticultural species were applied. The horticultural plants growing well in this wetland can not only purify wastewater, but also beautify environment. This study offered some references for plant species screening of constructed wetland treating low eutrophic water.更多还原