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Position: Home > Articles > Phosphorus Fractions and Distribution in Sediments of East Taihu Lake Journal of Hydroecology 2012,33 (1) 8-11

东太湖沉积物中磷的形态分布特征研究

作  者：
杨超;谷孝鸿;曾庆飞;蔡春芳;徐升宝;张伟业
单  位：
苏州大学基础医学与生物科学学院;中国科学院南京地理与湖泊研究所
关键词：
磷形态;沉积物;东太湖
摘  要：
应用化学连续提取法对东太湖沉积物中不同形态的磷进行提取,并分析其形态分布特征。结果表明,东太湖沉积物中磷形态以碎屑态磷(Ca-P)、有机磷(Or-P)、自生磷(De-P)和铁结合态磷(Fe-P)为主,平均含量分别为(188.6±32.5)、(73.1±18.6)、(45.2±3.3)和(34.3±18.5)μg/g;弱吸附态磷(Ex-P)、闭蓄态磷(Oc-P)和铝结合态磷(Al-P)含量较低,分别为(6.7±2.2)、(4.0±1.9)和(1.3±0.4)μg/g;总磷(TP)的平均值为(353.1±46.3)μg/g。4种不易释放的磷Ca-P、Or-P、De-P和Oc-P共占TP的88%,3种易释放的磷Fe-P、Ex-P和Al-P占12%。除Ca-P含量随沉积物深度增加而增大,Al-P含量较低且随深度增加无明显变化之外,其他各形态磷含量大致随深度增加而减少,表现出"表层富集"现象,说明东太湖的内源磷负荷虽然较小,但有增加的趋势。
译  名：
Phosphorus Fractions and Distribution in Sediments of East Taihu Lake
作  者：
YANG Chao1,GU Xiao-hong2,ZENG Qing-fei2,CAI Chun-fang1,XU Sheng-bao1,ZHANG Wei-ye1(1.School of Biology and Basic Medical Sciences,Soochow University,Suzhou 215123,China;2.Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China)
关键词：
phosphorus fractions;sediment;East Taihu Lake
摘  要：
Various fractions of phosphorus were extracted in sediment samples of East Taihu Lake by using a sequential chemical extraction,and the fractions distribution characteristics of phosphorus fractions in sediments were analyzed.The results indicated that the average concentrations of Ca-bound P(Ca-P),organic P(Or-P),detrital apatite P(De-P) and Fe-bound P(Fe-P) were(188.6±32.5),(73.1±18.6),(45.2±3.3) and(34.3±18.5) μg/g respectively,representing the major existence.While the average concentrations of exchangeable P(Ex-P),occluded P(Oc-P) and Al-bound P(Al-P) were(6.7±2.2),(4.0±1.9) and(1.3±0.4) μg/g respectively.The average concentrations of total phosphorus(TP) were(353.1±46.3)μg/g.Phosphorus of Ca-P,Or-P,De-P and Oc-P,which are not easy to release,accounted for 88%,while the easy release phosphorus of Fe-P,Ex-P and Al-P accounted for 12%.Ca-P content ascended directly with the depth of sediments,Al-P content being no significant variation,whilst contents of other forms of phosphorus declined with the depth of sediments,which presented surface enrichment phenomenon.The results suggested that the internal phosphorus load in sediment was not very serious yet,but it was increasing.

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