Fig. 6: A conceptual framework illustrating the relationships between soil pH and the denitrification product ratio, N2O emission factor (EF), denitrifier community composition, and the denitrification potential.
From: Intermediate soil acidification induces highest nitrous oxide emissions
The denitrification product ratio [i.e., N2O/(N2O + N2)] is the proportion of denitrification terminating with N2O, and the N2O EF is the proportion of fertilizer nitrogen (N) emitted as N2O (%). The denitrifier community composition is expressed as the ratio between the abundances of N2O-producing (nirK+nirS) and N2O-consuming (nosZI) microorganisms. Soil denitrification potential is usually expressed in mg N kg−1 h−1.
