地理科学 ›› 2006, Vol. 26 ›› Issue (2): 224-230.doi: 10.13249/j.cnki.sgs.2006.02.224

• 论文 • 上一篇    下一篇

苏北潮滩湿地植被对沉积物N、P含量的影响

高建华1,2, 杨桂山2, 欧维新3   

  1. 1. 南京大学海岸与海岛开发教育部重点实验室, 江苏 南京 210093;
    2. 中国科学院南京地理与湖泊研究所 流域室, 江苏 南京210008;
    3. 南京农业大学土地管理学院, 江苏 南京210095
  • 收稿日期:2004-12-16 修回日期:2005-04-11 出版日期:2006-03-20 发布日期:2006-03-20
  • 基金资助:
    江苏省自然科学基金(BK2005165)、江苏省"333工程"项目资助。

Influence of Tidal Flat Plant on Contents of Nitrogen and Phosphorus in North Jiangsu Province

GAO Jian-Hua1,2, YANG Gui-Shan2, OU Wei-Xin3   

  1. 1. Ministry of Education Key Laboraty for Coastal and Island Development, Nanjing University, Nanjing, Jiangsu 210095;
    2. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, Jiangsu 210008;
    3. College of Land Administation, Nanjing Agricultural University, Nanjing, Jiangsu 210095
  • Received:2004-12-16 Revised:2005-04-11 Online:2006-03-20 Published:2006-03-20

摘要: 文章对比分析了植被和沉积物中N、P垂向分布和季节变化,探讨不同植被对潮滩湿地N、P动态变化的影响。分析表明:潮滩湿地的分带性差异使N、P在潮滩湿地各地带有不同的分布规律和季节性变化特性,植被尤其是有较高地下生物量的互花米草和芦苇在整个潮滩湿地N、P的分布以及季节变化中起重要作用,潮滩植被主要是通过N、P在体内的主动转移,植物对沉积物中N、P的吸收以及富集死亡的地下根茎中分解矿化后释放的N、P来影响沉积物中N、P分布的; 1~4月通过枯落生物量回归到地面的N、P总量分别达到149.4 t和18.2 t,对整个湿地生态系统的生源物质循环以及生态环境产生很大影响。

Abstract: In this paper, the biomass of different plants in winter and spring are estimated. The contents and variations of N and P of plants, surface layer and core sediments in different ecological zones are also compared and analysized. Subsequently, the dynamic variations of N and P, which influenced by absorption, accumulation and transformation of different plants, are discussed. The results indicate that: for the zonation of tidal flat and different physiology construction of plants, the N and P show different distribution patterns and seasonal variations in different ecological zones; plants, especially perennial Spartina anglica and Phragmites communis with high ratio of aboveground and belowground biomass, play more important role in contents and seasonal variations of N and P in the whole tidal flat sediments; the main mechanism that the plant influence the sediment content of N and P include the active transformation of N and P in plant body, the absorption effect of plant, and the release of N and P from the decomposed and mineralized deceased belowground rhizome that accumulated in the belowground sediments; the quantities of N and P, returning to the ground with withering in different ecologic zones, reach 149.4 t and 18.2 t from January to April, and the biogeochemistry cycle and ecological environment of the tidal flat can be seriously affected.

中图分类号: 

  • Q14