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NITROGEN CYCLE. Wikipedia.org Nitrogen Fixation N 2 NH 4 +

Published byTrent Pyne Modified over 9 years ago

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Presentation on theme: "NITROGEN CYCLE. Wikipedia.org Nitrogen Fixation N 2 NH 4 +"— Presentation transcript:

1 NITROGEN CYCLE

2

3 Wikipedia.org

4 Nitrogen Fixation N 2 NH 4 +

5 Let’s visit an AMMONIA FACTORY

6 Recent increases in anthropogenic N fixation in relation to “natural” N fixation. Modified from Vitousek, P. M. and P. A. Matson (1993). Agriculture, the global nitrogen cycle, and trace gas flux. The Biogeochemistry of Global Change: Radiative Trace Gases. R. S. Oremland. New York, Chapman and Hall: 193-208.

7 Nitrogen Assimilation NH 4 + Organic N

8 Nitrogen Mineralization (decay) Organic N NH 4 +

9 Nitrification NH 4 + NO 2 - NO 3 - Nitrosomonas Nitrobacter Aerobic Autotrophs Energy obtained?

10 Denitrification NO 3 - N 2 + N 2 O Denitrification is an anaerobic process that is carried out by denitrifying bacteria, which convert nitrate to dinitrogen (gas) in the following sequence: NO 3 - NO 2 - NO N 2 O N 2

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