Although the variation trends of
N2O fluxes measured by the DN and DN-CO2 methods
after fertilization (Fig. 8b) were similar, the N2O fluxes
measured by the DN method were irregularly biased from
the fluxes measured by the DN-CO2 method, e.g., the N2O
flux measured by the DN method was occasionally 5-
fold higher than that by DN-CO2 method on September
6, 2011.