水生经济植物根际氮循环细菌及其作用的研究  

Research on the Nitrogen Cycle Bacteria and Actions in the Rhizosphere of Economic Aquatic Plants

作　　者：胡绵好[1] 袁菊红[1] 杨肖娥[2] 

机构地区：[1]江西财经大学资源与环境管理学院,江西南昌330032 [2]污染环境修复与生态健康教育部重点实验室浙江大学环境与资源学院,浙江杭州310029

出　　处：《水资源与水工程学报》2009年第5期49-54,共6页Journal of Water Resources and Water Engineering

基　　金：教育部科技研究重点项目((No.200705824);浙江省科技局重点项目(No.2006C13059)

摘　　要：利用生态浮床系统,在室内研究了浮床植物单作和混作对氮的去除效果及其根际周围硝化与反硝化菌种群数量以及硝化与反硝化作用速率的变化规律。结果表明,浮床植物混作系统对氮的去除效果优于植物单作和无植物系统,而植物系统又优于无植物系统;植物单作与混作根际硝化细菌种群数量和硝化作用速率、反硝化细菌种群数量和反硝化作用速率均具有明显的差异;处理15 d后,硝化细菌种群数量在水芹系统中的减少较比豆瓣菜和混作系统多,硝化作用速率在水芹系统中的降低较豆瓣菜和混作系统明显(P<0.05);反硝化细菌种群数量由多到少的顺序分别为水芹系统,豆瓣菜系统,混作系统,无植物系统;且反硝化作用速率由高到低的顺序分别为水芹系统,豆瓣菜系统,混作系统,无植物系统。Nitrogen removal in eutrophic water was studied by monoeulture and mixture plants in ecological floating bed system in the greenhouse. At the same time, the numbers of nitrifying and denitrifying bacteria population and the nitrification and denitrification rate in the floating bed plant rhizospere were quantified. The results showed that nitrogen removal in mixture system was outperformed the monoculture＇and no plant system, and the plant system was outperformed no plant system. There was significant difference between the monoculture and mixture system by the numbers of nitrifying bacteria population and denitrifying bacteria population and denitrification rate. In contrast to watercress system and mixture system, the numbers of nitrifying bacteria population and nitrification rate decreased obviously （P 〈0.05） in the water dropwort system, the order of the numbers of denitrifying bacteria population and denitrification rate after 15d treatment is： water dropwort system〉 watercress system 〉mixture system 〉no plant system.

关 键 词：生态浮床系统 硝化菌群 反硝化菌群 硝化作用速率 反硝化作用速率 

分 类 号：X703.1[环境科学与工程—环境工程] S432.42[农业科学—植物病理学]