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Nitrogen contamination and nitrogen biogeochemical circulation maladjustment is not only one of the main appearances of current global environment change but also serious environmental problem which restrict global social economical development and human healthy. Therefore by present, few researches are focused on nitrogen circulation regulars and influences in river ecosystem. Especially the lack of complete and systemic researches on microbial community structure, which attends nitrogen biogeochemical circulation, and its functions, result in lack of scientific theory guidance for rivers nitrogen circulation control and contamination treatment, so as to little improvement on rivers contamination is made at present.

[ Last edited by kestral on 2008-9-5 at 14:51 ]
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