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引用本文:王国祥,濮培民,黄宜凯,张圣照.太湖人工生态系统中氮循环细菌分布.湖泊科学,1999,11(2):160-164. DOI:10.18307/1999.0213
WANG Guo-xiang,PU Pei-min,HUANG Yu-kai,ZHANG Sheng-zhao.Distribution of Nitrogen Cycle Bacteria in an Artificial Ecosystem of Taihu Lake. J. Lake Sci.1999,11(2):160-164. DOI:10.18307/1999.0213
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太湖人工生态系统中氮循环细菌分布
王国祥, 濮培民, 黄宜凯, 张圣照
中国科学院南京地理与湖泊研究所, 南京 210008
摘要:
对太湖五里湖的以水生高等植物为主的湖泊人工生态系统,用最大可能数(MPN)法,测定了该系统内各种生态类型水生高等植物群落内的4类氮循环细菌的分布.结果表明,反硝化细菌的最大可能数(MPN),在水生高等植物群落内水体中较敞水区湖水高2-5个数量级,差异极显著(P<0.01),漂浮植物群落内水体的反硝化细菌MPN值较沉水和浮叶植物群落内水体高2-3个数量级,差异极显著(P<0.01);硝化细菌MPN值,敞水区湖水高于凤眼莲、水花生群落内水体,差异显著(P< 0. 05),菱群落与其他群落比较,亦有极显著性差异(P< 0. 01);亚硝化细菌MPN值,在水生高等植物群落内的水体中较敞水区高 3-4个数量级,差异极显著(P< 0. 01) ;氨化细菌MPN值,在水生高等植物群落内的水体中高于敞水区水体.除硝化细菌外,反硝化、亚硝化及氨化细菌均在根际处最为密集,且由根际向外呈现递减趋势.
关键词:  细菌  水生高等植物  氮循环  人工生态系统  太湖
DOI:10.18307/1999.0213
分类号:
基金项目:欧盟(NO.C11-CT93-0004(DG12-HSMU)资助项目
Distribution of Nitrogen Cycle Bacteria in an Artificial Ecosystem of Taihu Lake
WANG Guo-xiang, PU Pei-min, HUANG Yu-kai, ZHANG Sheng-zhao
Naming Institute of Geography Limnology, Academia Sinica Nanjing 210008
Abstract:
This paper first report the distribution and role of four nitrogen cycle bacteria in the artificial ecosystem of Taihu Lake. These nitrogen cycle bacteria include ammonifying bacteria, denitrify-ing bacteria, nitrobacteria and nitrovsobacteria, determined with MPN method. 1 he MPN values of denitrifying bacteria in the water covered by Alternanthera philoxeroides and Eichhornia cras-sipes are about 2-3 and 2-5 oraer-of-magnitudes higher than the water vegetated with other macrophytes and unvegetated water respectively. There is significant difference between them (P <0.01). The MPN values of ammonifying bacteria in vegetated water are markedly higher than that in unvegetated water. The MPN values of nitrosobacteria in vegetated water are notably higher than those in unvegetated water (P<0.01). The MPN values of nitrobacteria and ni-trosobacteria in the water vegetated with submerged plant are nigher than those in the water cov-ered by floating plant. The MPN values of ammonifying and denitrifying bacateria, nitrosobacte-ria are very dense in rhizosphere, and decrease from rhizosphere to outside.
Key words:  Nitrogen cycle  bacteria  macrophytes  artiucial ecosystem  Taihu Lake
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