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引用本文:俞振飞,王国祥,王立志,李振国,杭子清,魏宏农.苦草(Vallisneria natans)和黑藻(Hydrilla verticillata)对沉积物各形态磷垂直分布的影响.湖泊科学,2012,24(3):378-383. DOI:10.18307/2012.0308
YU Zhenfei,WANG Guoxiang,WANG Lizhi,LI Zhenguo,HANG Ziqing,WEI Hongnong.Effects of macrophytes Vallisneria natans and Hydrilla verticillata on the vertical distribution of different phosphorus fractions in sediments. J. Lake Sci.2012,24(3):378-383. DOI:10.18307/2012.0308
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苦草(Vallisneria natans)和黑藻(Hydrilla verticillata)对沉积物各形态磷垂直分布的影响
俞振飞1, 王国祥1, 王立志1,2, 李振国1,3, 杭子清1, 魏宏农1
1.南京师范大学地理科学学院, 江苏省环境演变与生态建设重点实验室, 南京 210046;2.山东省水土保持与环境保育重点实验室, 临沂 276000;3.湖南科技大学建筑与城乡规划学院, 湘潭 411201
摘要:
采用沉水植物苦草(V. natans)和黑藻(H. verticillata)作为研究对象,在其旺盛生长期测定群落内外上覆水及沉积物各形态磷的含量,以探究不同根系特点的沉水植物对沉积物中各形态磷垂直分布的影响.结果表明:实验进行30 d后苦草和黑藻组沉积物总磷(TP)、无机磷(IP)和氢氧化钠提取磷(NaOH-P)含量在垂直方向均呈现不同程度的降低.苦草和黑藻组沉积物TP的含量在4.5 cm深度处降低幅度最大,较对照组分别下降了58.91和36.46 mg/kg;IP含量分别在沉积物6.0和3.0 cm深度处降低幅度最大,较对照组分别降低了85.41和57.41 mg/kg.总体来看,沉水植物苦草对沉积物各形态磷含量降低的影响大于黑藻.
关键词:  沉水植物  沉积物  磷形态  苦草  黑藻  垂直分布
DOI:10.18307/2012.0308
分类号:
基金项目:国家自然科学基金项目(40873057);江苏省重大科技支撑项目(BE2008677)联合资助
Effects of macrophytes Vallisneria natans and Hydrilla verticillata on the vertical distribution of different phosphorus fractions in sediments
YU Zhenfei1, WANG Guoxiang1, WANG Lizhi1,2, LI Zhenguo1,3, HANG Ziqing1, WEI Hongnong1
1.College of Geographical Science, Nanjing Normal University, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210046, P. R. China;2.Shandong Provincial Key Laboratory of Soil Conservation and Environmental Protection, Linyi 276000, P. R. China;3.Architecture and Urban Planning School, Hunan University of Science and Technology, Xiangtan 411201, P. R. China
Abstract:
In order to study the effects of different root systems in different submerged macrophytes on the vertical distribution of phosphorus fractions in sediments, V. natans and H. verticillata were applied and phosphorus concentrations in overlying water and underneath sediments were investigated during the growth season. Results showed that the contents of total phosphorus (TP), inorganic phosphorus(IP) and NaOH-P fractions in sediments decreased vertically in different levels during both submerged macrophytic groups. Both submerged macrophytic groups reached their maximum decreased values at the depth of 4.5 cm, decreased by 58.91 and 36.46 mg/kg, respectively, comparing with the control. The maximum decreased values of IP in groups of V. natans and H. verticillata appeared at the depth of 6.0 and 3.0 cm, and they decreased by 85.41 and 57.41 mg/kg, respectively, comparing with the control. The results indicated that the submerged macrophyte V. natans has higher ability in lowering down phosphorus fractions than H. verticillata in sediments.
Key words:  Submerged macrophyte  sediment  phosphorus fraction  Vallisneria natans  Hydrilla verticillata  vertical distribution
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