However, this might be due to
the ammonification of organic nitrogen in the covering layer rather
than in the underlying composting pile, given no significant difference
in initial TN loss of raw materials between CK and Cover treatment
based on our statistical analysis. Only 0.5–1.7% of initial TN of
raw materials was lost by N2O emission. These results were similar
to the study by Wolter et al. (2004) who observed that 0.1–1.9% of
initial TN of raw materials was lost in the form of N2O emission.