文章摘要
富藻养殖水体中金鱼藻和篦齿眼子菜的抑藻效果研究
Responses of Eutrophic Ponds to Ceratophyllum demersum and Potamogeton pectinatus
投稿时间:2019-04-25  修订日期:2019-06-04
DOI:
中文关键词: 金鱼藻  篦齿眼子菜  浮游藻类  养殖池塘  水华
英文关键词: Ceratophyllum demersum  Potamogeton pectinatus  Algae  Aquaculture ponds  Blooms
基金项目:国家青年基金项目;河南省科技攻关项目;河南师范大学博士启动基金项目;河南省高校科技创新团队支持计划;河南省水产学重点学科
作者单位E-mail
李晨露 河南师范大学 18848967589@163.com 
常孟阳 河南师范大学  
董静 河南师范大学 happydj111@163.com 
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中文摘要:
      养殖水体夏季高温时水华现象频繁发生,给养殖业带来巨大的损失。目前常用解决方法多为物理打捞和泼洒化学试剂等,但是物理打捞费时费力,化学试剂容易造成污染,因而,更希望求助于生态安全方法控制或治理水体富营养化。已有研究发现常见水生植物释放的活性物质在低浓度下可以起到抑藻的作用,对藻类调控具有重要意义。本实验采用实验室静态模拟方法,取养殖池塘暴发蓝藻水华的水体,与沉水植物金鱼藻(Ceratophyllum demersum)及篦齿眼子菜(Potamogeton pectinatus)进行共培养,研究这两种沉水植物对养殖水华水体营养水平、藻类生长、藻类结构及浮游藻类生物多样性的影响,旨在为未来生态养殖提供进一步理论依据和参考。实验结果表明:①金鱼藻和篦齿眼子菜可显著降低水华水体氮、磷等营养水平(P<0.05);②金鱼藻和篦齿眼子菜可有效抑制水华蓝藻生长,尤其对颤藻和微囊藻效果显著(P<0.05),且篦齿眼子菜对水华蓝藻抑制效果更为显著。实验结束时篦齿眼子菜培养组藻密度下降93.6%,生物量下降98.9%,叶绿素a含量下降60.5%;金鱼藻培养组藻密度下降72.5%,生物量下降86.8%,叶绿素a含量下降54.3%;③金鱼藻和篦齿眼子菜的存在可促进养殖水体浮游藻类生物多样性增加,且金鱼藻提高浮游藻类生物多样性效果更显著。金鱼藻培养组浮游藻类生物多样性升高98.4%,篦齿眼子菜培养组浮游藻类生物多样性升高50.3%。
英文摘要:
      The cyanobacterial bloom occurs frequently during summer in aquaculture ponds, which has brought great loss to aquaculture industry. Physical salvage and chemical reagent are previously utilized to kill the harmful algae, thus improving the water quality. However, physical salvage is time-consuming and the chemical reagent is easy to cause more pollution. Thus, currently, it is more considered to regulate the water quality according to ecological strategies, such as the inhibition on cyanobacteria by submerged macrophytes. Due to the ecological safety, this method has been more and more applied in the eutrophic water region. In the present study, co-culture simulation experiments were used to detect the effects of submerged plants (Ceratophyllum demersum and Potamogeton pectinatus) on ponds phytoplankton composition and water quality (the concentration of total nitrogen, total phosphorus, soluble nitrogen, soluble phosphorus, nitrate, ammonia and chemical oxygen demand) during cyanobacterial blooms. The results showed that when compared with the control, C. demersum and P. pectinatus could significantly ① reduce the concentration of nitrogen and phosphrous in the water column, significant differences detected between the control and treatment with P. pectinatus; ② inhibit the growth of cyanobacteria, especially for O. scillatoria sp. and Microcystis sp.. The effects of P. pectinatus were bigger than that of C. demersum. Compared with the control group, the algal density, biomass and Chla in the treatment with P. pectinatus were decreased by 93.6%, 98.9% and 60.5% respectively, where as that in the treatment of C. demersum were decreased by 72.5%, 86.8% and 54.3%, respectively; ③ promote the phytoplankton biodiversity of the ponds. At the end of the experimentation, in comparison with the control, the biodiversity in the treatment with C. demersum and P. pectinatus were increased by 98.4% and 50.3%, respectively. The present study is aimed to provide more theoretical basis for the future eutrophic ware restoration and remediation.
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