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Characteristics of Nitrogen Removing Between Sediment-Water Interface in Meiliang Bay, Taihu Lake

Yang Longyuan; Cai Qiming; Qin Boqiang; Zheng Xunhua (Nanjing Instituie of Geography and Limnology, Chinese Academp of Sciences, Nanjing 210008;Institute of Atmospheric Physics, Chinese Academy of Scieaces, Beijing 100083)  
It has been measured that the sediment denitrification rate and the N2O 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. 6μmol/ (m2·h) at the sediment-water interface of Meiliang Bay, Taihu Lakc, and the N2O natural emission rate is 0.08-0.66μmol/ (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.
【Fund】: 中国科学院“九五”重点项目!KZ952-11-212和KZ951-B1-205-02
【CateGory Index】: P512.32
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