TABLE 2

Gross N transformation rates based on the 15N tracing model

ParameterPasture soilVegetable soil
KineticsaRate, mg kg−1 day−1 (mean ± SD)KineticsRate, mg kg−1 day−1 (mean ± SD)
Without DMPPWith DMPPWithout DMPPWith DMPP
MNlab10.82 ± 0.150.61 ± 0.3710.85 ± 0.291.33 ± 0.31
MNrec04.47 ± 0.413.82 ± 0.4306.69 ± 0.435.38 ± 0.31
INH4-Nlab10.07 ± 0.030.07 ± 0.0510.10 ± 0.030.39 ± 0.18
INH4-Nrec10.16 ± 0.080.33 ± 0.2010.09 ± 0.030.28 ± 0.08
ONrec00.06 ± 0.040.18 ± 0.0400.06 ± 0.010.09 ± 0.04
ONH415.75 ± 0.216.36 ± 0.13215.71 ± 0.7012.24 ± 0.52
ANH418.27 ± 0.856.79 ± 0.6112.18 ± 0.162.85 ± 0.30
RNH4a10.96 ± 0.592.27 ± 0.5010.00 ± 0.000.01 ± 0.00
INO310.12 ± 0.100.04 ± 0.0310.01 ± 0.000.02 ± 0.01
DNO310.02 ± 0.010.06 ± 0.0110.02 ± 0.000.01 ± 0.00
  • a 0, zero order; 1, first order; 2, Michaelis-Menten.