Nitrate-Nitrogen Leaching and Modeling in Intensive Agriculture Farmland in China

Table 2

Input parameter values used in the LEACHM model during calibration.

Parameter	Input values
Partition coefficient, NH4-N (m^3/kg)	0.6 × 10^−3
Partition coefficient, NO3-N (m^3/kg)	0.55
Denitrification half saturation constant (mg/L)	10
Litter mineralization rate constant (per day)	0.01
Humus mineralization rate constant	7 × 10^−5
Q10 factor	2.0
C : N ratio for biomass and humus	10.0
Maximum NO3^−/NH4^+ ratio in solution to control	8.0
Nitrification rate	100
Molecular diffusion coefficient (mm^2/d)	140
Saturated hydraulic conductivity, (mm/d)	25
Water potential, kPa	1.3
Air-entry value, kPa	11.8
B parameters, kPa