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引用本文:陶花,潘继征,沈耀良,李文朝,黄峰.滆湖底质特性对菹草(Potamogeton crispus)和伊乐藻(Elodea nattalii)生长的影响.湖泊科学,2011,23(3):383-388. DOI:10.18307/2011.0310
TAO Hua,PAN Jizheng,SHEN Yaoliang,LI Wenchao,HUANG Feng.Effects of substrate character of Lake Gehu on the growth of Potamogeton crispus and Elodea nattalii. J. Lake Sci.2011,23(3):383-388. DOI:10.18307/2011.0310
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滆湖底质特性对菹草(Potamogeton crispus)和伊乐藻(Elodea nattalii)生长的影响
陶花1, 潘继征2, 沈耀良1,3, 李文朝2, 黄峰1
1.苏州科技学院环境科学与工程学院, 苏州 215011;2.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;3.苏州科技学院江苏省环境科学与工程重点实验室, 苏州 215011
摘要:
通过模拟试验,研究滆湖3种沉积物(表层湖泥、硬底湖泥、表层覆岸泥)对菹草和伊乐藻生长的影响.结果表明,生长于表层湖泥、硬底湖泥、表层覆岸泥的菹草和伊乐藻生物量分别为4.07、1.98、3.69kg/m2和1.86、1.27、1.74kg/m2,表层湖泥较适合这两种沉水植物生长.3种沉积物对菹草和伊乐藻的干湿比影响显著,硬底湖泥 > 表层湖泥 > 表层覆岸泥.在表层覆岸泥和表层湖泥中,两种沉水植物的叶绿素含量均较高,伊乐藻在不同沉积物中差别最大,叶色区别明显.丙二醛的测定结果进一步表明硬底湖泥不适宜植物生长.试验结果表明菹草和伊乐藻在滆湖不同的沉积物上能够正常生长,表现出良好的适应性,菹草适合在表层湖泥中生长,伊乐藻更适合在表层覆岸泥中生长,通过对滆湖不适宜的底质环境进行改造,以利于沉水植物的生长繁殖,为滆湖生态修复中的基质修复与沉水植被重建提供理论指导.
关键词:  滆湖  沉积物  沉水植物  基质修复
DOI:10.18307/2011.0310
分类号:
基金项目:国家重点基础研究发展计划项目(2008CB418005);国家水体污染控制与治理科技重大专项项目(2008ZX07101-007-05);江苏省科技厅社会发展项目(BE2009697)联合资助
Effects of substrate character of Lake Gehu on the growth of Potamogeton crispus and Elodea nattalii
TAO Hua1, PAN Jizheng2, SHEN Yaoliang1,3, LI Wenchao2, HUANG Feng1
1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, P. R. China;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;3.Provincial Key Lab of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, P. R. China
Abstract:
Using mesocom experiment, this paper studied the effects of three different sediments (surface mud, hard mud and surface mud of bank sediment) of Lake Gehu on the growth of two submerged macrophytes, Potamogeton crispus and Elodea nattalii. When grown on surface mud, hard mud and surface mud of bank sediment, the mean biomass of P. crispus and E. nattalii were 4.07, 1.98, 3.69 kg/m2 and 1.86, 1.27, 1.74 kg/m2, respectively. All the tested species grown on hard mud had the lowest biomass and shoot height. The wet and dry ratio of P. crispus and E. nattalii was affected significandy by the sediments followed with an order of hard mud > surface mud > surface mud of bank sediment. The contents of chlorophyll-a and chlorophyll-b on the surface mud with bank sediment and surface mud were both higher than those cultured on the hard mud. The difference of leaf colour of E. nattalii between the three sediments was remarkable. The measurement of malondialdehyde further sugested that hard mud was not good for the growth of the two submerged macrophytes. Finally the results showed that the two submerged macrophytes were able to grow normally under conditions of different sediments from Lake Gehu. P. crispus grew well on surfurce mud while E. nattalii was more adapted to surface mud of bank sediment. Sediment rehabilitation should be made in order to facilitate the growth of submerged macrophytes of Lake Gehu and give a guide on sediment rehabilitation and the submerged macrophjrtes restoration of Lake Gehu.
Key words:  Lake Gehu  sediment  submerged macrophytes  sediment rehabilitation
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