亚热带地区潜流人工湿地木本植物筛选与净化潜力评价

为了解决亚热带地区人工湿地植物的冬季草本植物地上部分枯死的问题,本研究引入16种木本植物到潜流人工湿地中进行净化潜力筛选与评价,并对木本植物的适应形态特性、生理特性、氮磷积累量指标进行了聚类分析.结果表明,测试木本植物的成活率、株高增幅、根长增幅、根系活力、叶绿素含量、超氧化歧化酶、丙二醛、脯氨酸、过氧化物酶、生长量、氮磷平均浓度、氮磷的积累量都存在很大差异.采用建立的净化潜力评价体系将测试植物聚类分为3大类,较强的有夹竹桃、木槿,中等的有:棕榈、小叶迎春、栀子花、六月雪、龟甲冬青,较弱的有:大叶冬青、常春藤、金森女贞、金叶女贞、金边七里香、七里香、桂花、十大功劳、红叶石楠.

Selection and Purification Potential Evaluation of Woody Plant in Vertical Flow Constructed Wetlands in the Subtropical Area

In order to solve the problem that wetland herbaceous plants tend to die during winter in subtropics areas, selection and purification potential evaluation experiments were carried out by introducing into the constructed wetlands 16 species of woody wetland plants. Cluster analysis was performed by including the morphological characteristics, physiological characteristics, as well as nitrogen and phosphorus accumulation of the woody wetland plants. The results indicated that there were significant differences among the tested woody plants in their survival rate, height increase, root length increase and vigor, Chlorophyll content, Superoxide dismutase, Malonaldehyde, Proline, Peroxidase, biomass, average concentration and accumulation of nitrogen and phosphorus. Based on the established evaluation system, the tested plants were clustered into 3 groups. The plants in the 1st group possessing high purification potentials are Nerium oleander and Hibiscus syriacus. Those in the 2nd group possessing moderate purification potentials are Trachycarpus fortune, Llex latifolia Thunb., Gardenia jasminoides, Serissa foetida and Ilex crenatacv Convexa. And those in the 3rd group with low purification potentials are Jasminum udiflorum, Hedera helix, Ligustrum vicaryi, Ligustrum lucidum, Buxus sempervives, Murraya paniculata, Osmanthus fragrans, Mahoniafortune and Photinia serrulata.