沙基和浮床培养方式种植水芹对人工湿地冬季水质净化能力的对比

发布时间：2018-01-22 14:48

本文关键词： 人工湿地水芹种植方式根系活力营养物去除水质净化沙基法浮床法　出处：《湖泊科学》2017年06期 　论文类型：期刊论文

【摘要】：针对人工湿地冬季净化能力不足以及不同湿地植物种植方式可能影响其净化效果的湿地构建问题,通过小试实验,研究了沙基法和浮床法种植水芹(Oenanthe javanica(Bl.)DC.)对冬季人工湿地净化富营养水体效果的影响.在整个冬季,4个实验周期中,处理期间总磷(TP)和总氮(TN)去除率表现出显著差异:对照组(CK)、沙基种植组和浮床种植组4个周期对TP的去除率平均值为20.17%±19.23%、59.60%±7.54%和45.44%±29.22%;对TN的去除率平均值依次为:29.83%±19.65%、64.89%±23.01%和60.50%±25.86%.与CK组相比,冬季种植水芹可显著提高湿地对TP和TN的去除率;与浮床种植方式相比,沙基种植方式的TP和TN去除率略有提高.而对于COD的去除率,沙基种植组周期间波动较大(-27.5%~52.92%),浮床种植组组周期间更为平稳(10.83%~40.42%),浮床种植组在全部4个周期的平均去除率(23.13%±14.41%)略高于沙基种植组(19.38%±35.38%).2种种植方式下,水芹均可安全适应冬季温带气候;与沙基种植法相比,浮床种植方式更有利于植物总生物量的增加,特别是根系生物量的增加;相对于浮床种植,传统的沙基种植法能使水芹根系在温带冬季大部分时间内保持较高的活力和泌氧能力.因此,考虑到建设成本,在浅水区域可优选传统的沙基(或底泥)种植方式;在深水区域,使用浮床种植的方式,也能保证耐寒水生植物安全度过冬季和保持较高的净化能力.
[Abstract]:In view of the lack of purification capacity of artificial wetland in winter and the wetland construction problem which may be affected by different planting methods of wetland plants, a pilot experiment was conducted. The effects of cultivation of Oenanthe javanica Bl.DC.on the purification of eutrophic water body by artificial wetland in winter were studied. In the four experimental cycles, the removal rates of TP and TNN showed significant differences during the treatment period: control group (CK). The average removal rate of TP was 20.17% 卤19.23and 59.60% 卤7.54% and 45.44% 卤29.22 respectively in the shaki implantation group and floating bed implantation group. The average removal rate of TN was:: 29.83% 卤19.65% 卤64.89% 卤23.01% and 60.50% 卤25.86 respectively, compared with CK group. The removal rate of TP and TN was significantly increased by planting water celery in winter. Compared with floating bed planting, the removal rate of TP and TN was slightly higher in sand base planting than in floating bed planting. However, the removal rate of COD in sand base planting group fluctuated greatly during the week between-27. 5% and 52. 92%). The floating bed group was more stable during the week (10.83%, 40.42%). The average removal rate of floating bed planting group was 23.13% 卤14.41% in all four cycles, which was slightly higher than that of sand base planting group (19.38% 卤35.38%). Water celery can adapt to winter temperate climate safely; The floating bed planting method was more favorable to increase the total biomass of plant, especially the biomass of root system. Compared with floating bed planting, the traditional sand base planting method can make the root system keep high vitality and oxygen secretion ability in temperate winter. Therefore, the cost of construction is considered. In shallow water area, the traditional sand base (or sediment) planting method can be selected; In the deep water area, using floating bed planting method can also ensure the cold tolerant aquatic plants to survive the winter safely and maintain high purification ability.
【作者单位】：南京大学生命科学学院;洪泽县清盈尾水湿地管理有限公司;南京大学常熟生态研究院;
【基金】：国家水体污染控制与治理科技重大专项(2014ZX07204-002) 中央高校基本科研业务费专项资金项目(14380019)联合资助
【分类号】：X173;X52
【正文快照】： ***国家水体污染控制与治理科技重大专项(2014ZX07204-002)和中央高校基本科研业务费专项资金项目(14380019)联合资助.2016-12-24收稿;2017-02-15收修改稿.左杰(1989~),女,硕士研究生;E-mail:zuojie_cyan@126.com.for chemical oxygen demand(COD),the removal efficiency of

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