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rye_grass.yaml
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rye_grass.yaml
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# Crop parameter file for use with the PCSE implementation of the LINGRA grassland
# simulation model
#
# Creation date: 2021-06-23
#
# Contact: Allard de Wit (allard.dewit@wur.nl)
# Wageningen Environmental Research
# PO Box 47, 6700 AA Wageningen, The Netherlands
#
# More information: - http://pcse.readthedocs.io
#
Version: 1.0.0
Metadata: &meta
Creator: Allard de Wit
Contributor:
Contact: allard.dewit@wur.nl
Publisher: Wageningen Environmental Research
Title: Parameter sets for the LINGRA/LINGRA-N grassland simulation model
Date: 2021-06-23
Language: EN
Format: YAML
Subject: LINGRA parameters for perennial rye grass (Lolium Perenne)
Description: This file provides parameters for the generic variant as well as two specific variants
that were calibrated on experiments in northern vs southern Europe
Identifier:
Relation:
Source: https://edepot.wur.nl/336784
Type: Report
Coverage:
Region: Europe
Rights: European Union Public License (EUPL)
Keyword: grassland; lolium perenne; rye grass
CropParameters:
EcoTypes:
RyeGrass: &RyeGrass
LAIcrit:
- 4.0
- Critical leaf area index beyond which death to self-shading occurs
- ['ha.ha-1']
LAIinit:
- 0.1
- Initial LAI at start of simulation
- ['ha.ha-1']
LUEmax:
- 2.8
- Maximum light use efficiency
- ['g.MJ-1']
LUEreductionRadiationTB:
- [0.0, 1.0, 10.0, 1.0, 40.0, 0.33]
- Reduction function on LUE as function of radiation level
- ['MJ','-']
LUEreductionSoilTempTB:
- [-20.0, 0.0, 6.0, 0.0, 9.0, 1.0, 40.0, 1.0]
- Reduction function on LUE for soil temperature
- ['C', '-']
PartitioningRootsTB:
- [-10.0, 0.263, 0.0, 0.263, 1.0, 0.165]
- Fraction to roots as function of transpiration factor
- ['C', '-']
RDRbase:
- 0.01
- Base relative death rate of leaves
- ['d-1']
SiteFillingMax:
- 0.693
- Maximum site filling new buds
- ['-']
TempBase:
- 6.0
- Base temperature for effective temperature (phenology and leaf growth)
- ['C']
TillerNumberinit:
- 7000.0
- Initial number of tillers
- ['-']
WeightREinit:
- 200.0
- Weight of carbyhydrate reserves – initial
- ['kg ha-1']
WeightRTinit:
- 4.0
- Dry weight of the roots – initial
- ['kg ha-1']
CO2A:
- 360.0
- Atmospheric CO2 concentration
- ['ppm']
KDIFTB:
- [0.0, 0.6, 2.0, 0.6]
- Extinction coefficient of leaves for PAR and for diffuse light
- ['-','-']
SLA:
- 0.0025
- Specific leaf area
- ['ha.kg-1']
LAIafterHarvest:
- 0.5
- Remaining LAI after harvesting - not used by PCSE/LINGRA as this is an agromanagement input but
included here for completeness
- ['-']
TillerFormRateA0:
- 0.335
- A parameter in the equation for tiller formation rate valid up till
7 days after harvest
- ['d-1']
TillerFormRateB0:
- 0.067
- B parameter in the equation for tiller formation rate valid up till
7 days after harvest
- ['d-1']
TillerFormRateA8:
- 0.867
- A parameter in the equation for tiller formation rate starting from
8 days after harvest
- ['d-1']
TillerFormRateB8:
- 0.183
- B parameter in the equation for tiller formation rate starting from
8 days after harvest
- ['d-1']
TSUMmax:
- 600.
- Temperature sum to reach maximum grass development stage.
- ['C.d']
RDRshading:
- 0.030
- Maximum relative death rate of leaves due to self-shading
- ['-']
RDRdrought:
- 0.050
- Maximum relative death rate of leaves due to water stress
- ['-']
RDRnitrogen:
- 0.050
- Maximum relative death rate of leaves due to nitrogen stress
- ['-']
# Nitrogen parameters
NMAXLV_TB:
- [0.0, 0.035, 5.0, 0.035]
- Maximum N concentration in leaves as a function of development stage
- ['-', 'mass.mass-1']
NMAXRT_FR:
- 0.5
- maximum N concentration in roots as fraction of maximum N concentration in leaves
- ['-']
NRESIDLV:
- 0.01
- residual N fraction in leaves [kg N kg-1 dry biomass]
- ['mass.mass-1']
NRESIDRT:
- 0.005
- residual N fraction in roots [kg N kg-1 dry biomass]
- ['mass.mass-1']
NUPTAKE_MAX:
- 9.0
- Maximum daily N uptake rate
- ['kg.ha-1.d-1']
NSLA:
- 0.5
- coefficient for the effect of N stress on SLA reduction
- ['-']
NLUE:
- 1.10
- coefficient for the reduction of gross CO2 assimilation rate due to N stress
- ['-']
NCRIT_FR:
- 1.00
- Critical N concentration as fraction of maximum N concentration
- ['-']
#
# Water Use
#
CFET:
- 1.00
- correction factor transpiration rate
- ['-']
DEPNR:
- 3.0
- crop group number for soil water depletion
- ['-']
IAIRDU:
- 0
- air ducts in roots present (=1) or not (=0)
- ['NA']
IOX:
- 0
- Oxygen stress effect enabled (=1) or not (=0)
- ['NA']
#
# ROOTING DEPTH
#
RDI:
- 10.0
- initial rooting depth
- ['cm']
RRI:
- 1.2
- maximum daily increase in rooting depth
- ['cm.d-1']
RDMCR:
- 40.0
- maximum rooting depth
- ['cm']
Varieties: # Variety adaptations based on table 3.3 of the report in the metadata
Northern_RyeGrass:
<<: *RyeGrass
LUEmax:
- 3.0
- Maximum light use efficiency
- ['g.MJ-1']
LUEreductionSoilTempTB:
- [-20.0, 0.0, 3.0, 0.0, 8.0, 1.0, 40.0, 1.0]
- Reduction function on LUE for soil temperature
- ['C', '-']
TempBase:
- 3.0
- Base temperature for effective temperature (phenology and leaf growth)
- ['C']
LAIafterHarvest:
- 0.8
- Remaining LAI after harvesting - not used by PCSE/LINGRA as this is an agromanagement input but
included here for completeness
- ['-']
Southern_RyeGrass:
<<: *RyeGrass
LUEmax:
- 2.4
- Maximum light use efficiency
- ['g.MJ-1']
LUEreductionSoilTempTB:
- [-20.0, 0.0, 5.0, 0.0, 9.7, 1.0, 40.0, 1.0]
- Reduction function on LUE for soil temperature
- ['C', '-']
TempBase:
- 5.0
- Base temperature for effective temperature (phenology and leaf growth)
- ['C']
LAIafterHarvest:
- 0.5
- Remaining LAI after harvesting - not used by PCSE/LINGRA as this is an agromanagement input but
included here for completeness
- ['-']