地学前缘 ›› 2008, Vol. 15 ›› Issue (5): 212-218.

• 论文 • 上一篇    下一篇

太湖入湖河道沉积物中生物利用磷和营养水平分析

  

  1. 1浅水湖泊综合治理与资源开发教育部重点实验室, 江苏 南京 210024
    2河海大学 环境科学与工程学院, 江苏 南京 210024

  • 出版日期:2008-05-02 发布日期:2008-05-02
  • 作者简介:袁旭音(1964—),男,教授,主要研究方向为环境地球化学。Email:netyxy@263net
  • 基金资助:

    中国地质调查局国土资源调查项目(GZTR20060201);河海大学创新基金项目(2004104)

Bioavailable phosphorus in sediments in the rivers to the west of the   Taihu lake  and their trophic level, East China

  1. 1Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Nanjing 210024, China
    2College of Environmental Science and Engineering, Hohai University, Nanjing 210024, China

  • Online:2008-05-02 Published:2008-05-02

PDF (PC)

714

摘要：

为了解太湖入湖河道的营养状况,研究了太湖西部河流沉积物生物利用磷的组成与分布。研究结果显示,北部沉积物中营养元素较高,南部较低;沉积物中生物利用磷的含量次序为藻类可利用磷（AAP）>NaHCO3提取磷（OLP）>水溶性磷（WSP）>易解吸磷（RDP）,其中AAP是重要的生物利用磷,AAP的比例越高,富营养化程度越高。AAP与营养元素的相关性在不同区域河道有所不同,北部河道与总氮（TN）、总磷（TP）相关性较好,中部和南部河道与沉积物有机质总量（TOM）相关性较好。沉积物的生物利用磷受不同污染源影响较大。对比河道沉积物与湖泊沉积物的特征,发现湖泊沉积物中生物利用磷（BAP）/总磷（TP）、藻类可利用磷（AAP）/总磷（TP）都高于河道沉积物,表明湖泊沉积物中的磷更容易被植物吸收。

关键词: 关键词：生物利用磷;沉积物;河流;太湖西部

Abstract:

The fractions and distribution of bioavailable phosphorus in river sediments were studied in order to identify the trophic level of inflow rivers to the west of Taihu LakeThe nutritive elements in sediments show higher contents in the northern rivers and lower in the southern riversThe contents of bioavailable phosphorus decrease in following order: algal available phosphorus (AAP)>OlsenP(OLP)>water soluble phosphorus(WSP)>readily desorbed phosphorus(RDP)The trophic level increases with the proportion of AAP to total phosphorusThe correlations between AAP and nutritional components show different characteristics for sediments from different regionsAAP is well associated with TN and TP in the northern rivers and with TOM in the middle and southern riversThe bioavailable phosphorus is evidently influenced by pollution sources, and its high content is corresponding to the severe algal bloomIn comparison with river sediments, the lake sediments have higher values of BAP/TP and AAP/TP, which suggests that phosphorus in lake sediments is readily absorbed by hydrophyte

Key words:

Key words: bioavailable phosphorus; sediment; river; the west of Taihu Lake

中图分类号: