Reakcje cyklu azotowego
Fixation
Fig. 2.3 The nitrogen cycle. Reservoir units in moles of nitrogen (expressed as N), fluxes in mol yr~ 1 (after Liu et al. 1977).
Table 2.1 Chemical fluxes in the nitrogen cycle
Miner alisation
Conversion of organie N to inorganic N
CH2NH2COOH +3/202 - 2C02 + H20 + NH3 Glycine (amino acid)
NH3 can then be oxidised to N03~ and M02~ Fixation
Conversion of atmosoheric N, to oreanic N W2 + 3M'2 - 2NM3
2C02 + M'20 + NH'3 - CM2NH'2COOH Assimilation
Conversion of inorganic N to organie N
4N03- + 8H20 -»4NH3 + 802 -f 40H NH3 + 2C02 + h2o - CH2NH2COOH
Denitrification
Conversion of inorganic N to atmospheric N2 4N03~ + 2H20-* 2N2 + 502+40H~
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