Distinct temporal patterns of N2O flows from
control and SDWC treatments of grass soils, as well
as the results obtained for nitrogen mineralization,
when using different moisture conditions, reveal that
grass soil induced N2O flows were weakly related to
the NO3
-
content that might have been denitrified.
Nevertheless, the presence of only NO3
- does not
ensure denitrification (Kunickis et al., 2010). Thus,
it can be postulated that N2O flows were not only due
to microbial nitrification, but also the availability of
total organic carbon was a limiting factor (McCarty
and Bremner, 1992). On the other hand, such short
and temporary drying rewetting frequency enhanced
denitrified activity by availing physically protected
organic matter (Fierer and Schimel, 2002).