CHEN Juan,CHEN Su-juan,LI Ming-yin,et al.Research on Purification Capacity of Hemerocallis citrina Baroni in Rural Aquaculture Wastewater[J].Northern Horticulture,2014,38(06):66-69.
萱草对农村养殖废水净化能力的研究
- Title:
- Research on Purification Capacity of Hemerocallis citrina Baroni in Rural Aquaculture Wastewater
- 文章编号:
- 1001-0009（2014）06-0066-04
- Keywords:
- Hemerocallis citrina Baroni; aquaculture wastewater; purification capacity; growth; physiological response
- 分类号:
- S 682.1+9
- 文献标志码:
- A
- 摘要:
- 以萱草为试材，通过水培试验，研究了萱草对农村养殖废水的净化能力及其在高、低浓度污水中的生长和生理适应性，以期为农村污水治理提供数据支持。结果表明：萱草能显著降低养殖废水的生物需氧量(BOD)和化学耗氧量(COD)、氨氮、总氮和总磷含量；不同浓度的污水处理对萱草生长和生理过程的影响不同；2种污水处理下，与CK相比，萱草叶片类胡萝卜素含量、叶绿素a含量和总叶绿素含量均无显著差异，但高浓度污水处理降低了萱草叶片叶绿素b含量；在高浓度养殖废水处理下，虽然萱草叶片超氧化物歧化酶（SOD）活性略有增强，但丙二醛(MDA)含量仍呈显著上升，表明萱草在高浓度养殖废水胁迫下受到了明显的过氧化胁迫和膜伤害；高浓度污水显著降低了萱草根系活力，而低浓度养殖废水处理下，萱草表现出比CK更高的根系活力；低浓度养殖废水中的氮、磷养分促进了萱草的生长，但高浓度养殖废水则抑制了萱草的生长和生物量积累；因而萱草可用于一定浓度范围的养殖废水净化，但不适宜高浓度的原水的处理，在实际应用时可结合养殖废水的物理前处理技术，作为人工湿地的备选植物应用。
- Abstract:
- Taking Hemerocallis citrina Baroni as material,by a hydro-cultural experiment,the purification capacity of Hemerocallis citrina Baroni in rural aquaculture wastewater and its growth and physiological adaptability to high and low concentration of waste water were studied.The results showed that Hemerocallis citrina Baroni significantly reduced the BOD,COD,NH3-N,total-N and total-P content of wastewater compared with un-plant wastewater.Two concentration wastewater treatments differently affected the growth and physiological process of daylily.In two wastewater treatments,no difference in chlorophyll a content,carotenoid content and total chlorophyll content were observed,however,chlorophyll b content was decreased by high concentration wastewater treatment comparing with control plants.In high concentration wastewater treatment (HW),although leaf superoxide dismutase (SOD) activity slightly increased,but MDA content also significantly increased,indicating Hemerocallis citrina Baroni suffered obvious oxidant stress and membrane damage under HW treatment.On the other hand,the root activity significantly increased by low wastewater treatment (LW) and obviously decreased by HW treatment compared with control plant.In conclusion,HW treatment significantly inhibited the growth of Hemerocallis citrina Baroni,whereas the nitrogen and phosphor in LW treatment could be beneficial to the growth and biomass accumulation of Hemerocallis citrinaBaroni.Therefore,Hemerocallis citrina Baroni could purify aquaculture wastewater of some content.In practical application,Hemerocallis citrina Baroni could be considered as a selected plant in constructed wetland that combined with physical pre-treatment technology.
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备注/Memo
第一作者简介：陈娟（1975-），女，湖南衡阳人，硕士，讲师，研究方向为植物生态学。E-mail：cj041699@126.com.