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net.simplace.sim.components.experimental.slim.SlimPhosphorus

Calculates P leaching, plant availability and uptake and transition between dissolved, active and fixed phosphorus.

Calculation

For details see also SlimPhosphorusFunctions (link to its documentation below the variables table).

On initialisation

Initializes pools by calculating amounts from concentration (AmountFromConcentration()).
Calculates coefficients for the flows (CalculateFlowCoefficients()), depending on the soil type.

Daily calculation

Adds mineralisation (from input) and fertilizer to dissolved P.
Calculates interchange between dissolved, active and fixed pool (PoolsInterchange()).
Calculates leaching (Leaching()).
Calculates plant available P and peforms the uptake (Avail() and Uptake()).
Calculates rates, states, P balance and concentrations from amounts (ConcentrationFromAmount()).

References

(1) Williams, Izaurralde: The apex model
(2) Fortrancode of the EPIC model

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cBSA	Base saturation by the ammonium acetate method	DOUBLEARRAY	%	-	-	-
constant	cBulkDensity	Bulk density of soil	DOUBLEARRAY	g/cm3	0.0	-	-
constant	cCaCO3	CaCO3 concentration per layer	DOUBLEARRAY	%	0.0	-	-
constant	cClay	Clay content per layer	DOUBLEARRAY	%	0.0	1.0	-
constant	cDegreeOfWeathering	Type/weathering degree of soil: 0=calcareous, 1:slightly weathered, 2: moderately weathered, 3: highty weathered	INT	-	-	-	0
constant	cInitialAdsorbedPConcentration	Initial adsorbed P concentration per layer	DOUBLEARRAY	ppm	0.0	-	-
constant	cInitialDissolvedPConcentration	Initial dissolved P concentration per layer	DOUBLEARRAY	ppm	0.0	-	-
constant	cInitialFixedPConcentration	Initial fixed P concentration per layer	DOUBLEARRAY	ppm	0.0	-	-
constant	cLowerBoundaryPConcentration	P concentration in the lower boundary of the soil profile	DOUBLE	g/l	0.0	1000.0	0.0
constant	cPH	pH value of soil per layer	DOUBLEARRAY	1	0.0	14.0	-
constant	cRootMaxPUptakeRate	Maximum uptake rate per one metre root	DOUBLE	g/m	-	-	0.0
constant	cSoilLayerDepth	Depth of lower layer boundary for each layer	DOUBLEARRAY	m	0.0	-	-
input	iDoInitialize	Switch to re-initialize the model with initial values.	BOOLEAN	1	-	-	false
input	iMineralizedPRate	Daily Mineralized P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
input	iPDemand	P demand by the plant	DOUBLE	g/(m2 d)	-	-	0.0
input	iPFertilizer	P fertilizer	DOUBLE	g/(m2 d)	-	-	0.0
input	iRootLength	Root length per layer	DOUBLEARRAY	m	-	-	-
input	iWaterContent	Total water content per layer	DOUBLEARRAY	mm	-	-	-
input	iWaterFlow	Daily water flow from a layer to the neighbour layer below	DOUBLEARRAY	mm/d	-	-	-
state	sAdsorbedP	Adsorbed P per layer	DOUBLEARRAY	g/m2	0.0	-	-
state	sDissolvedP	Dissolved P per layer	DOUBLEARRAY	g/m2	0.0	-	-
state	sFixedP	Fixed P per layer	DOUBLEARRAY	g/m2	0.0	-	-
state	sLeaching	Leached P	DOUBLE	g/m2	-	-	0.0
state	sTotalUptakeP	Total P uptake	DOUBLE	g/m2	-	-	0.0
rate	rAdsorbedPRate	Daily change of adsorbed P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
rate	rAvailPRate	Daily plant available P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
rate	rDissolvedPRate	Daily change of dissolved P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
rate	rFixedPRate	Daily change of fixed P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
rate	rLeachingRate	Daily leaching rate	DOUBLE	g/(m2 d)	-	-	-
rate	rTotalAvailPRate	Daily total avail P in profile	DOUBLE	g/(m2 d)	-	-	0.0
rate	rTotalUptakePRate	Daily total plant uptaken P in profile	DOUBLE	g/(m2 d)	-	-	0.0
rate	rUptakePRate	Daily P taken up by plant per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
out	AdsorbedPConcentration	Adsorbed P concentration per layer	DOUBLEARRAY	ppm	0.0	-	-
out	AdsorptionCoefficients	Asorption coefficients per layer	DOUBLEARRAY	1	-	-	-
out	AdsorptionRate	Daily adsorbed P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
out	CumulatedFertilizer	Cummulated fertilizer over time	DOUBLE	g/m2	-	-	0.0
out	CumulatedMineralizedP	Cummulated mineralized P over time in whole profile	DOUBLE	g/m2	-	-	0.0
out	DissolvedPConcentration	Dissolved P concentration per layer	DOUBLEARRAY	ppm	0.0	-	-
out	DissolvedPFlow	Daily dissolved P flow from a layer to the neighbour layer below	DOUBLEARRAY	g/(m2 d)	-	-	-
out	FixationCoefficients	Fixation coefficients per layer	DOUBLEARRAY	1	-	-	-
out	FixationRate	Daily fixed P per layer	DOUBLEARRAY	g/(m2 d)	-	-	-
out	FixedPConcentration	Fixed P concentration per layer	DOUBLEARRAY	ppm	0.0	-	-
out	InitialAdsorbedP	Initial adsorbed P per layer	DOUBLEARRAY	g/m2	0.0	-	-
out	InitialDissolvedP	Initial dissolved P per layer	DOUBLEARRAY	g/m2	0.0	-	-
out	InitialFixedP	Initial fixed P per layer	DOUBLEARRAY	g/m2	0.0	-	-
out	PBalance	P Balance	DOUBLE	g/m2	-	-	0.0

See also: SlimPhosphorusFunctions

public class SlimPhosphorus extends net.simplace.sim.model.FWSimComponent {
// Public Constructors
public SlimPhosphorus();
// Protected Constructors
protected SlimPhosphorus(String aName, HashMap aFieldMap, HashMap aInputMap,
Element aSimComponentElement, FWSimVarMap aVarMap, int aOrderNumber);

// Public Instance Methods

public HashMap createVariables(); // Defines
net.simplace.sim.model.FWSimComponent

// Protected Instance Methods

protected void init(); // Defines net.simplace.sim.model.FWSimComponent

protected void initVariables();

protected void reInitialize();

protected void process(); // Defines net.simplace.sim.model.FWSimComponent

protected FWSimComponent clone(FWSimVarMap aVarMap);
// Defines net.simplace.sim.model.FWSimComponent

}

Hierarchy: java.lang.Object - net.simplace.sim.model.FWSimComponent (net.simplace.sim.util.FWSimFieldContainer) - SlimPhosphorus