中山大学学报自然科学版 ›› 2016, Vol. 55 ›› Issue (6): 140-147.

• 研究论文 • 上一篇    下一篇

几种植物浮床的水质净化及水华防治效率

朱术超1,刘毅2,李善1,关易云1,徐建区1,蒋海龙3,刘蔚秋1   

  1. 1. 中山大学生命科学学院,广东 广州510275;
    2. 广东省水利水电技术中心,广东 广州510635;
    3. 封开江口中学,广东 肇庆526500
  • 收稿日期:2016-04-01 出版日期:2016-11-25 发布日期:2016-11-25

Effects of plant floating beds on water purification and bloom control

ZHU Shuchao1, LIU Yi2, LI Shan1, GUAN Yiyun1, XU Jianqu1, JIANG Hailong3, LIU Weiqiu1   

  1. 1. School of Life Sciences,Sun Yat-sen University,Guangzhou 510275,China;
    2. Guangdong Water Resources and Hydropower Technology Center,Guangzhou 510635,China;
    3. Jiangkou Middle School, Zhaoqing 526500, China
  • Received:2016-04-01 Online:2016-11-25 Published:2016-11-25

摘要:

分别构建香根草Vetiveria zizanioides、黄菖蒲Iris pseudacorus、西芹Apium graveolens浮床及其不同组合的植物浮床,并在水体中加入6种不同种类的浮游植物及一种水生动物-斑马鱼Danio rerio,研究不同浮床系统对水质的净化效应及其对水生生物的影响。结果显示三种植物在浮床上能健康生长,其生物量、株高和根长均明显增加,且香根草和黄菖蒲的长势优于西芹。植物浮床均能有效防止水体的中化学需氧量(CODMn)的上升,但各生态浮床植物之间无显著性差异;植物浮床能显著去除水体中的氮(N)、磷(P)营养盐,其中,香根草的去除效果最好,而西芹的效果相对较差。总体而言,在系统中添加斑马鱼能在一定程度上提高浮床系统对水体的净化功能。香根草浮床能显著抑制水体中浮游植物的生长,相对而言其他类型的植物浮床对浮游植物的抑制能力较弱或无显著影响,且不同种类浮游藻类对植物浮床的敏感度不同。香根草和黄菖蒲对生态浮床系统中斑马鱼的生物量具有促进作用,香根草的促进作用大于黄菖蒲。综上所述,香根草是一种优良的浮床植物,可广泛用于水体净化及水华防治,而黄菖蒲可用于城市景观水体的净化。

关键词: 植物浮床, 水体净化, 浮游植物, 香根草Vetiveria zizanioides, 黄菖蒲Iris pseudacorus, 西芹Apium graveolens

Abstract:

To investigate the water purification effects of different floatingbed systems and their influences on aquatic organisms, floating-bed systems vegetated with Vetiveria zizanioides, Iris pseudacorus, Apium graveolens or their combinations respectively were constructed, 6 species of phytoplankton as well as zebrafish (Danio rerio) were also added to the systems. The results showed that the three plant species could all grow well in the floating-bed. The growth of Vetiveria zizanioides and Iris pseudacorus were better than Apium graveolens. All floatingbed systems could prevent the increase of chemical oxygen demand (CODMn) in water. However, no significant difference was observed among different floating-bed systems. Floating-bed systems could also remove the nitrogen and phosphorus nutrients in the water effectively, with V. zizanioides  having the best effect. In general, putting Danio rerio into the systems improved the water purification efficiency to some extent. Floating-beds cultivated with V. zizanioides significantly inhibited the growth of phytoplankton, while the inhibition effects of floating-beds vegetated with other plants were relatively lower or not significant. On the other side, the sensitivity of different phytoplankton species to floating-bed systems was different. The growth of D. rerio was significantly stimulated by floating-beds cultivated with V. zizanioides or I. pseudacorus, with V. zizanioides being more effective. Overall, V. zizanioides might be an excellent candidate for floating-bed cultivation in water purification and bloom prevention, while I. pseudacorus might be used in water purification of urban landscapes.

Key words: plant floating-bed, water purification, phytoplankton, Vetiveria zizanioides, Iris pseudacorus, Apium graveolens

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