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Denitrification and Its Role in Cycling and Removal of Nitrogen in River
  
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KeyWord:nitrogen; denitrification; nitrogen gas; nitrous oxide; 15N isotope; N2/Ar ratio; river
Author NameAffiliation
MA Pei Henan Institute of Engineering, Zhengzhou 451191, China
Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 
LI Xin-yan Nanjing Institute of Geography and Limnology, State Key Laboratory for Lake Science and Environments, Chinese Academy of Sciences, Nanjing 210008, China 
WANG Hua-xin Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 
WANG Jia-ning Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 
YAN Wei-jin Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 
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Abstract:
      Anthropogenic inputs of “new” active nitrogen(N) into the environment have caused water eutrophication, acidification as well as greenhouse gas emission.In this paper, the following issues were reviewed :when and where did the river denitrification occur? How dids denitrification respond to N concentration and load? What were relationships between river denitrification and water residence time and N load? How did river hydrology and geomorphology influence N losses from the denitrification? What were the characteristics of river denitrification rates at ecosystem scale? In addition, methods for measuring river denitrification were discussed.