| 引用本文: | 赵兴青,杨柳燕,于振洋,樊启慧,詹忠,肖元庚,尹大强,秦伯强.太湖沉积物理化性质及营养盐的时空变化.湖泊科学,2007,19(6):698-704. DOI:10.18307/2007.0612 |
| ZHAO Xingqing,YANG Liuyan,YU Zhenyang,FAN Qihui,ZHAN Zhong,XIAO Yuangeng,YIN Daqiang,QIN Boqiang.Temporal and spatial distribution of pbysirnchemical characteristics and nutrients in sediments of Lake Taihu. J. Lake Sci.2007,19(6):698-704. DOI:10.18307/2007.0612 |
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| 太湖沉积物理化性质及营养盐的时空变化 |
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赵兴青1, 杨柳燕1, 于振洋1, 樊启慧1, 詹忠1, 肖元庚1, 尹大强1, 秦伯强2
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1.污染控制与资源化研究国家重点实验室南京大学环境学院, 南京 210093;2.中国科学院南京地理与湖泊研究所, 南京 210008
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| 摘要: |
| 在不同季节,采集太湖梅梁湾和贡湖湾沉积物柱状样,研究沉积物Eh、pH、总氮、总磷以及有机质四季垂向部面分布变化特征.研究结果表明,在表层下(0-3cm).Eh随沉积物深度的增加迅速下降,很快进入还原状态.沉积物剖面上pH变化幅度不大,在6.4-7.8之间,冬季沉积物pH均有所降低.太湖沉积物中含有丰富的营养盐,总氮和总磷最高浓度分别为2.68和0.864 mg/g,其剖面分布特征表明,沉积物表层总氮和总磷含量远高于底层,其含量随深度增加而降低,但四季变化趋势不明显.沉积物中有机质含量在10 cm以上变化幅度较大,随着沉积物深度的增加,有机质含量明显减少,季节变化幅度不大.比较不同采样点发现,位于梅梁湾生态系统试验区内的S1位点沉积物氮磷内源负荷最大. |
| 关键词: 沉积物 氯化还原电位 pH 总磷 总氮 有机质 太湖 |
| DOI：10.18307/2007.0612 |
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| 基金项目:国家重点基础研究发展(973)计划项目(2002CB412307);国家重大水环境专项项目(2002AA601011);国家自然科学基金项目(40371102)联合资助． |
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| Temporal and spatial distribution of pbysirnchemical characteristics and nutrients in sediments of Lake Taihu |
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ZHAO Xingqing1, YANG Liuyan1, YU Zhenyang1, FAN Qihui1, ZHAN Zhong1, XIAO Yuangeng1, YIN Daqiang1, QIN Boqiang2
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1.State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, P. R. China;2.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| Three sites were selected for samples in Lake Taihu to observe temporal and spatial distribution of redoxpotential(Eh),pH, total nitrogen (TN),total phosphorus (TP) and organic matter(OM) in sediments. Belowthe surface of sediments Eh declined rapidly with the increase of sediment depth and it was under anaerobic condi-lion except the top layer of sediment. pH value changed silightly in the profile of sediments, which ranged from 6. 4to 7. 8. With a comparison between four seasons, p.H value was the lowest in winter. TN and TP concentrations insediments of Lake Taihu were higher, and the maximum concentrations reached 2. 68 mg/g and 0. 864 mg/g. respectively. Their vertical profiles showed that TN snd TP concentrations in surface sediments were much higherthan in deeper layers and decreased steeply with the increase of the depth on the top 15 cm of sediment layers. OMconcentrations declined rapidly al the top 15 cm of sediment layers, but there was little change in four seasons. Thesediment loads of TN and TP were much higher at Sl than that at other sites. |
| Key words: Sediment Eh pH TP TN organic maser Lake Taihu |
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