Fig. 1. Schematic representation of nitrogen balance model with reaction constants.
Fig. 2. Schematic representation of the N-transformations in flooded rice field.
Fig. 3. Content of fugacity capacity Zi in each compartment resulted from the model simulation. The values of Zi are 0.2% for air Z1, 48.3% for water Z2, 8.8% for soil Z3 and 42.7% for rice plant Z4.
Fig. 4. Changes of Fugacity and concentration in each compartment for different detention times from 1hour to 20 days.
Fig. 5. Changes of Fugacity and concentration in each compartment for different detention times from 1hour to 20 days when the removal process in the rice plants was ignored.
Fig. 6. Graphical representation of mass balance (mol/hr) in and between compartments.
Table 1. Mass balance equations for each compartment in the model
Table 2. Summary of Z-value and D-value used in the model
Table 3. Important parameters for the model calculation
Table 4. Physical and chemical property of NH3-N
Table 5. Important input variables for the model simulation
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