The flux of NO between soil and atmosphere was demonstrated to be a function of simultaneous production and consumption reactions which are both due to microorganisms. Measurement of production and consumption rates in the laboratory allowed us to predict the NO flux in-situ by using a simple diffusion model. Both production and consumption of NO are controlled by soil variables such as temperature, pH, moisture and nutrients. NO is produced by many different microorganisms of which nitrifiers and denitrifiers seem to dominate. Their relative contribution to NO production is affected by soil conditions, e.g. moisture. NO is reduced to N2O by denitrifiers, but is also oxidised to nitrate by aerobic bacteria. The flux of COS between soil and atmosphere is also due to simultaneous production and consumption reactions which are at least partially due to biological processes. NO2 turnover in soil is a purely chemical process.
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- Mechanisms of Release of NOx and COS from Soil and Soil Micro-organisms
- Springer Berlin Heidelberg