Package net.simplace.sim.components.experimental

Class PlantHeightByTemperature

java.lang.Object

net.simplace.sim.model.FWSimComponent

net.simplace.sim.components.experimental.PlantHeightByTemperature

All Implemented Interfaces:

net.simplace.sim.util.FWSimFieldContainer

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

Calculates plant height from temperature

The model calculates plant height increment by using daily mean temperature. It uses the ODE of the logistic function

\[ \frac{dH}{dt} = r \cdot \left (T(t)-T_b\right )\cdot H(t)\cdot \left (1 - \frac{H(t)}{H_{max}}\right ) \]

For daily calculation of the height \(H_d\) this turns down to the formula

\[ H_{d+1} = F_{stress}\cdot r\cdot \left (T_{d}-T_b \right )\cdot H_d\cdot \left (1 - \frac{H_d}{H_{max}} \right ) + H_d \]

where \(H_d\) is the crop height at day \(d\), \(H_{max}\) the maximal crop height, \(T_d\) the daily mean temperature and \(T_b\) the base temperature. \(F_{stress}\) is a factor between 0 and 1 that reduces the daily potential growth due to stresses.

The height growths stops, when the temperature sum \(\sum_{d=1}^{D}(T_d - T_b)\) is bigger than the maximum temperature sum \(TS_{max}\).

References

Berghuijs, H. N. C. et al, Identification of species traits enhancing yield in wheat-faba bean intercropping: development and sensitivity analysis of a minimalist mixture model, Plant Soil, 2020, https://doi.org/10.1007/s11104-020-04668-0

Author:

Gunther Krauss, guntherkrauss@uni-bonn.de

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cBaseTemperature	base temperature	DOUBLE	°C	-10.0	20.0	0.0
constant	cInitialHeight	initial height	DOUBLE	m	0.0	100.0	0.0
constant	cMaxHeight	maximal height	DOUBLE	m	0.0	100.0	0.0
constant	cRelativeGrowthRate	relative growth rate per day and degree Celsius	DOUBLE	(°C d)-1	0.0	1.0	0.00567
constant	cTsumMaxHeight	temperature sum where the height growth stops	DOUBLE	°C d	0.0	10000.0	800.0
input	iDoHarvest	I true, harvesting occurs (height is set to 0).	BOOLEAN	1	-	-	false
input	iDoSow	If true, sowing occurs (height is set to initial height.)	BOOLEAN	1	-	-	false
input	iStressFactor	Stress factor that may reduce daily height increment. Default of 1 means no reduction.	DOUBLE	1	0.0	1.0	1.0
input	iTMax	Daily maximum temperature	DOUBLE	°C	-50.0	100.0	0.0
input	iTMin	Daily minimum temperature	DOUBLE	°C	-50.0	100.0	0.0
state	sHeight	Plant height	DOUBLE	m	0.0	50.0	0.0
state	sTsum	Actual temperature sum	DOUBLE	°C d	0.0	50.0	0.0
rate	rHeightRate	Daily increment of height	DOUBLE	m/d	0.0	10000.0	0.0
rate	rTsumRate	Daily increment of temperature sum	DOUBLE	°C	0.0	60.0	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
PlantHeightByTemperature()	Empty constructor used by class.forName()

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()	Initializes the fields by getting input and output FWSimVariables from VarMap
protected void	process()	Process the algorithm and write the results back to VarMap

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

PlantHeightByTemperature

public PlantHeightByTemperature()

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:

• net.simplace.simulation.model.FWSimComponent#createVariables()

init

protected void init()

Initializes the fields by getting input and output FWSimVariables from VarMap

Specified by:

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

See Also:

• net.simplace.simulation.model.FWSimComponent#init()

process

protected void process()

Process the algorithm and write the results back to VarMap

Specified by:

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

See Also:

• net.simplace.simulation.model.FWSimComponent#process()

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)

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:

• net.simplace.simulation.model.FWSimComponent#clone(net.simplace.simulation.util.FWSimVarMap)