【摘要】 比较研究了人工湿地污水处理系统中7种植物对氮、磷的吸收能力。研究表明,所选7种湿地植物,稳定生长4个月后,平均总生物量在1215~3500g/m2,植物氮、磷平均质量浓度分别为13.76~23.11、1.44~3.80mg/g。香蒲具有最高氮积累量达48.18g/m2,梭鱼草具有最高磷积累量为7.23g/m2,姜草对氮、磷的积累量最低分别为21.40、1.68g/m2。植物地上部氮、磷积累量与地下部的氮、磷积累量差异较大,除姜草外,植物地上部、地下部的氮、磷积累量比均大于3,黄花美人蕉地上部、地下部的氮、磷积累量比分别达11.75、12.10。通过植物收割去除氮、磷量约占湿地总去除量的2%~6%。更多还原

【Abstract】 The nitrogen and phosphorus removal capacity of seven plant species (Canna indica L.,Canna indica var.flava,Typha augustifolia,Pennisetum purpureum Schumach,Colocasiaesculenta,Pontedena cordata and Cymbopogon martini) was compared in the constructed wetlands established for treating municipal wastewater.After 4 months of growth, the total biomass, nitrogen and phosphorus contents of the plants were found in the range 1 215～3 500 g/m2, 13.76～23.11 mg/g and 1.44～3.80 mg/g, respectively. The nitrogen uptake of the plants ranged from 21.40 g/m2 to 48.18 g/m2 and that phosphorus uptake from 1.68 g/m2 to 7.23 g/m2; Typha augustifolia and Pontedena cordata exhibited the highest uptake of N and P respectively, while Cymbopogon martini exhibited the least uptake of both N and P. The above ground tissues accumulated much more N and P than the below ground tissues; the ratio was>3, except for Cymbopogon martini(>2), while the highest ratios of 11.75 for N and 12.10 for P were found in Canna indica var.flava. The total plant uptake of nitrogen and phosphorus accounted for 2% to 6% of the overall nutrient removal in the wetland wastewater treatment system.更多还原