nitrogen_cycle
Table of Contents
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XII. Nitrogen Cycle
A. Mineralization
Total vs net N mineralization
1. Ammonification
R - NH2 € NH4+
a. Factors affecting ammonification
2) Soil pH
Does the ammonification process affect soil pH?
b. Management implications
Many companies in Sweden and Finland stated to fertilize forests with urea instead of NH4NO3
2) Fire
2. Nitrification
There are some heterotrophic microorganisms (mostly fungi) which also can nitrify NH4
2 NH4 + 3 O2 € NO2 + 2 H2O + 4H+
2 NH4 + 3 O2 € NO2 + 2 H2O + 4H+
a. Water/O2
b. Soil pH
(Untitled)
c. Management
What would happen to soil pH if N is added as OM?
B. Denitrification
C6H12O6 + 4NO3 € 6 CO2 + 6 H2O + 2 N2 (or N2O)
C6H12O6 + 4NO3 € 6 CO2 + 6 H2O + 2 N2 (or N2O)
C6H12O6 + 4NO3 € 6 CO2 + 6 H2O + 2 N2 (or N2O)
3) Nitrogen Fixation