Package net.simplace.sim.components.crop

Class VernalisationAndPhotoresponse

java.lang.Object

net.simplace.sim.model.FWSimComponent

net.simplace.sim.components.crop.VernalisationAndPhotoresponse

All Implemented Interfaces:

net.simplace.sim.util.FWSimFieldContainer

public class VernalisationAndPhotoresponse
extends net.simplace.sim.model.FWSimComponent

Reduces daily temperature increment by vernalisation and photoresponse.

Vernalisation

Vernalisation days

The daily increment of vernalisation days is determined by daily average temperature iDAVTEMP

\[ \begin{eqnarray} VDI(iDAVTEMP) & = & \left\{ \begin{array}{l} 0 & \text{if} \quad iDAVTEMP \lt cTlowCritical\\ \frac{iDAVTEMP - cTlowCritical}{cTlow - cTlowCritical} & \text{if} \quad cTlowCritical \le iDAVTEMP \lt cTlow \\ 1 & \text{if} \quad cTlow \le iDAVTEMP \lt cThigh \\ \frac{cThighCritical - iDAVTEMP}{cThighCritical - cThigh} & \text{if} \quad cThigh \le iDAVTEMP \lt cThighCritical \\ 0 & \text{if} \quad cThighCritical \le iDAVTEMP\\ \end{array} \right. \end{eqnarray} \]

And sVernalDays is incremented by VDI(iDAVTEMP).

Vernalisation factor

VernalisationFactor (VF) is determined by the sVernalDays (VD)

\[ \begin{eqnarray} VF(VD) & = & \left\{ \begin{array}{l} 0 & \text{if} \quad VD \lt cVernalDaysMin\\ \frac{VD - cVernalDaysMin}{cVernalDaysMax - cVernalDaysMin} & \text{if} \quad cVernalDaysMin \le VD \lt cVernalDaysMax \\ 1 & \text{if} \quad cVernalDaysMax \le VD \\ \end{array} \right. \end{eqnarray} \]

Photoresponse Factor

DayLength is calculated from current DOY and cLatitude

Photoresponse curve is interpolated from cPhotoresponseTable, which is a double array, holding the duration (in hours) in the even entries and the coresponding factors in the odd entries.

The PhotoresponseFactor is then chosen from the interpolated curve according to the Daylength.

After anthesis, no daylength effects are taken into account (PhotoresponseFactor = 1).

Applying Vernalisation and Photoresponse

Before anthesis:

\[ \begin{eqnarray} RTSUM & = & iTSumBaseAnt \cdot Min(PhotoresponseFactor, VernalisationFactor) \end{eqnarray} \]

After anthesis:

\[ \begin{eqnarray} RTSUM & = & iTSumBaseMat \cdot Min(PhotoresponseFactor, VernalisationFactor) \end{eqnarray} \]

cApplyPhotoresponse and cApplyVernalisation control whether photoresponse, vernalisation or both are applied. If the control variables are false, the coresponding factor is always 1, meaning that the effect is not applied.

The state sVernalDays has to be reset on each sowing. Therefore the input iDoSow has to be provided.

References:

Goudriaan, H.H. Van Laar, 1994. Modelling Potential Crop Growth Processes, Kluwer Academic Publishers, Dordrecht (1994) 238 pp

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cApplyPhotoresponse	Flag to activate photo response (True: daylength sensitive crops)	BOOLEAN	1	-	-	true
constant	cApplyVernalisation	Flag to activate vernalisation (True: crops requiring vernalisation for flower initialisation	BOOLEAN	1	-	-	true
constant	cLatitude	Latitude of the simulated location	DOUBLE	°	0.0	90.0	60.0
constant	cPhotoperiodTableFactor	Correction factor of development rate in dependence of day length (c.f. PHOTTB)	DOUBLEARRAY	1	-	-	0.0 0.0 1.0 1.0
constant	cPhotoperiodTableHour	Day length for correction factor of development (c.f. PHOTTB)	DOUBLEARRAY	h	-	-	0.0 8.0 20.0 24.0
constant	cPhotoresponseTable	Crop specific photo response table as function of daylength in hours	DOUBLEARRAY	1	-	-	-
constant	cThigh	Upper temperature threshold for vernalisation; days with higher mean air temperature are not fully considered as a vernalisation day	DOUBLE	°C	-40.0	50.0	10.0
constant	cThighCritical	Upper temperature threshold for vernalisation; days with higher mean air temperature don't contribute at all for vernalisation day	DOUBLE	°C	-40.0	50.0	17.0
constant	cTlow	Lower temperature threshold for vernalisation, days with lower mean air temperature are not fully considered as a vernalisation day	DOUBLE	°C	-40.0	50.0	3.0
constant	cTlowCritical	Lower critical temperature threshold for vernalisation, days with lower mean air temperature don't contribute at all for vernalisation day	DOUBLE	°C	-40.0	50.0	-4.0
constant	cVernalDaysMax	Crop specific maximum number of days required for vernalisation	INT	1	0	400	70
constant	cVernalDaysMin	Crop specific minimum number of days required for vernalisation	INT	1	0	100	10
input	iDAVTMP	Daily mean air temperature	DOUBLE	°C	0.0	50.0	-
input	iDevStage	Development stage of the crop (1.0=anthesis, 2.0=physiological maturity)	DOUBLE	1	0.0	3.0	-
input	iDevStageBaseShoot	Development stage for base shoot	DOUBLE	1	0.0	10000.0	0.5
input	iDoSow	true if sowing day	BOOLEAN	1	-	-	false
input	iTSumBaseAnt	Daily effective temperature before anthesis	DOUBLE	°C	0.0	10000.0	-
input	iTSumBaseMat	Daily effective temperature after anthesis	DOUBLE	°C	0.0	10000.0	-
input	iTSumBaseShoot	Daily effective temperature after shooting - if given	DOUBLE	°C	0.0	10000.0	-
state	sPhotoresponseArray	Photo response array as function of daylength in minutes	DOUBLEARRAY	1	0.0	20.0	-
state	sVernalDays	actual Vernal Days	DOUBLE	1	0.0	400.0	0.0
out	DayLength	Day Length in minutes	INT	min	0	1441	0
out	PhotoresponseFactor	daily photoresponse factor	DOUBLE	1	0.0	1.0	0.0
out	RTSUM	Daily effective temperature used to calculate the temperature sum and development stage at a given day	DOUBLE	°C	0.0	50.0	-
out	VernalisationFactor	daily vernalisation factor	DOUBLE	1	0.0	1.0	0.0

Nested Class Summary

Nested classes/interfaces inherited from class net.simplace.sim.model.FWSimComponent

net.simplace.sim.model.FWSimComponent.TEST_STATE

Field Summary

Fields inherited from class net.simplace.sim.model.FWSimComponent

iFieldMap, iFrequence, iInputMap, iJexlRule, iMasterComponentGroup, iName, iOrderNumber, isComponentGroup, iSimComponentElement, iSimModel, iVarMap

Constructor Summary

Constructors

Constructor	Description
VernalisationAndPhotoresponse()	Empty constructor used by class.forName()
VernalisationAndPhotoresponse(String aName, HashMap<String,net.simplace.sim.util.FWSimVariable<?>> aFieldMap, HashMap<String,String> aInputMap, org.jdom2.Element aSimComponentElement, net.simplace.sim.util.FWSimVarMap aVarMap, int aOrderNumber)	Called by Clone method only

Method Summary

Modifier and Type	Method	Description
protected net.simplace.sim.model.FWSimComponent	clone(net.simplace.sim.util.FWSimVarMap aVarMap)
HashMap<String,net.simplace.sim.util.FWSimVariable<?>>	createVariables()	Create the FWSimVariables as interface for this SimComponent
HashMap<String,net.simplace.sim.util.FWSimVariable<?>>	fillTestVariables(int aParamIndex, net.simplace.sim.model.FWSimComponent.TEST_STATE aDefineOrCheck)	called for single component test to check the components algorithm.
protected void	init()
static Double[]	PhotoResponseToArray(InterpolationTable TAB)	Stores the photo response factors for a duration in minutes in an array
protected void	process()

Methods inherited from class net.simplace.sim.model.FWSimComponent

addVariable, bind, checkCondition, createSimComponent, createSimComponent, createSimComponent, createSimComponent, doProcess, getConstantVariables, getContentType, getCreateFormXML, getDescription, getEditFormXML, getFieldMap, getFrequence, getFrequenceRuleScript, getInputs, getInputVariables, getMasterComponentGroup, getName, getOrderNumber, getOutputVariables, getVariable, getVariableField, getVarMap, initialize, isConditionCheck, isVariableAvailable, performLinks, performLinks, readInputs, removeVariable, reset, runComponentTest, setVariablesDefault, toComponentLinkingXML, toDocXML, toGroupXML, toOutputDefinitionXML, toResourcesDataXML, toResourcesDefinitionXML, toString, toXML, writeVarInfos

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

VernalisationAndPhotoresponse

public VernalisationAndPhotoresponse(String aName,
 HashMap<String,net.simplace.sim.util.FWSimVariable<?>> aFieldMap,
 HashMap<String,String> aInputMap,
 org.jdom2.Element aSimComponentElement,
 net.simplace.sim.util.FWSimVarMap aVarMap,
 int aOrderNumber)

Called by Clone method only

Parameters:

aName -

aFieldMap -

aInputMap -

aSimComponentElement -

aVarMap -

aOrderNumber -

VernalisationAndPhotoresponse

public VernalisationAndPhotoresponse()

Empty constructor used by class.forName()

Method Details

createVariables

public HashMap<String,net.simplace.sim.util.FWSimVariable<?>> createVariables()

Create the FWSimVariables as interface for this SimComponent

Specified by:

createVariables in interface net.simplace.sim.util.FWSimFieldContainer

Specified by:

createVariables in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.createVariables()

init

protected void init()

Specified by:

init in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.init()

process

protected void process()

Specified by:

process in class net.simplace.sim.model.FWSimComponent

clone

protected net.simplace.sim.model.FWSimComponent clone(net.simplace.sim.util.FWSimVarMap aVarMap)

Specified by:

clone in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.clone(net.simplace.sim.util.FWSimVarMap)

fillTestVariables

public HashMap<String,net.simplace.sim.util.FWSimVariable<?>> fillTestVariables(int aParamIndex,
 net.simplace.sim.model.FWSimComponent.TEST_STATE aDefineOrCheck)

called for single component test to check the components algorithm.

Specified by:

fillTestVariables in class net.simplace.sim.model.FWSimComponent

See Also:

• net.simplace.sim.util.FWSimFieldContainer#fillTestVariables(int aParamIndex, TEST_STATE aDefineOrCheck)

PhotoResponseToArray

public static Double[] PhotoResponseToArray(InterpolationTable TAB)

Stores the photo response factors for a duration in minutes in an array

Parameters:

TAB - table for linear interpolation

Returns:

the array with minutes as key and Photo response as value