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引用本文:杨龙元,蔡启铭,秦伯强,郑循华.太湖梅梁湾沉积物-水界面氮迁移特征初步研究.湖泊科学,1998,10(4):41-47. DOI:10.18307/1998.0406
Yang Long-yuan,Cai Qi-ming,Qin Bo-qiang,Zheng Xun-hua.Characteristics of Nitrogen Removing Between Sediment-Water Interface in Meiliang Bay,Taihu Lake. J. Lake Sci.1998,10(4):41-47. DOI:10.18307/1998.0406
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太湖梅梁湾沉积物-水界面氮迁移特征初步研究
杨龙元1, 蔡启铭1, 秦伯强1, 郑循华2
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.中国科学院大气物理研究所, 北京 100029
摘要:
用乙炔为抑制剂,气相色谱法测定了1997年夏季太湖梅梁湾口沉积物-水界面的反硝化率和N2O的自然排放率,太湖梅梁湾沉积物的反硝化率为1.4-5.6μmolN2/(m2·h),N2O的自排放率为0.08-0.66μmolN2/(m2·h).探讨了沉积物-水界面NO3-交换动态.指出沉积物内硝化-反硝化作用是太湖湖泊生态系统氮循环过程中-个重要的环节.在湖泊水土界面氮交换中,沉积物具有吸收水体中NO3-的性能.
关键词:  水土界面  氮迁移  太湖梅梁湾  沉积物
DOI:10.18307/1998.0406
分类号:
基金项目:中国科学院“九五”重点项目,KZ952-11-212和KZ951-B1-205-02
Characteristics of Nitrogen Removing Between Sediment-Water Interface in Meiliang Bay,Taihu Lake
Yang Long-yuan1, Cai Qi-ming1, Qin Bo-qiang1, Zheng Xun-hua2
1.Nanjing Instituie of Geography and Limnology, Chinese Academp of Sciences, Nanjing 210008;2.Institute of Atmospheric Physics, Chinese Academy of Scieaces, Beijing 100083
Abstract:
It has been measured that the sediment denitrification rate and the N20 natural emission rate at the mouth of Meiliang Bay,Taihu Lake,in the summer of 1997. The measure was performed by Acetylene inhibition technique. The sediment denitrification rate is 1.4-5. 6ptmol/ (m2·h) at the sediment-water interface of Meiliang Bay, Taihu Lake,and the N20 natural emission rate is 0. 08-0. 66fxmoI N2/(m2·h). The exchange trend of NO3-between sediment-water interface was discussed as well. It has been pointed out that the sediment denitrification is an important sink in the nitrogen cycling of the Taihu Lake ecosystem. The sediments have a function that absorbs NO3-ions from the water column into sediment in the nitrogen exchange process between the sediment-water interface.
Key words:  Sediment-water interface  nitrogen removing  Taihu Lake  sediment
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