BioKenaF: A crop growth simulation model for kenaf

September “27-30” 2006

Madrid, Spain

“A Crop Growth Dynamic Simulation Model for Kenaf”

University of Thessaly

Department of Agriculture, Crop Production &

Agricultural Environment

Laboratory of Agronomy and Applied Crop Physiology

(UTH) Greece

Model structure

� Leaf Photosynthesis

� Canopy Photosynthesis

� Respiration

� Dry Matter distribution

� Water balance routine

Leaf Photosynthesis

The relation between available radiation and

CO2 gross assimilation by a single leaf is

described by an asymptotic exponential relation

FG = AMAX * ( 1 − EXP(− EFF*PAR/AMAX) )

FG: assimilation in kg(CO2)ha-1(leaf)h-1

PAR: photosynthetically active radiation(J m-2s-1)

EFF: is the light use efficiency in

kg ha-1h-1/J m-2s-1

AMAX: maximum rate of CO2 assimilation in

kg(CO2)ha-1(leaf)h-1.

Canopy Photosynthesis

EXTRA

TERRESTIAL

IRRADIANCE

GLOBAL

RADIATION

PAR

PARDIR

PARDIF

VIS

As. Rate of

sunlit

leaves

As. Rate of

shaded

leaves

Total

Assimilation

Rate

Integration

Respiration

Maintenance respiration (MRR): Energy consumed to meet maintenance requirements.

MRRorg=Rorg*Sorg

Growth respiration (EC): Respiration providing energy for the conversion of primary photosynthesis into structural plant materials like, proteins, cellulose, fats, lignin.

DWIorg=DailyGainorg*EC

Maintenance respiration (MRR): Energy consumed to meet maintenance requirements.

MRRorg=Rorg*Sorg

Growth respiration (EC): Respiration providing energy for the conversion of primary photosynthesis into structural plant materials like, proteins, cellulose, fats, lignin.

DWIorg=DailyGainorg*EC

Dry matter distribution (Daily basis)

Total

Assimilation

Rate

Carbohydrate

As. Rate

(FGASS)

Rate of

NET Potential

As.

Maintenance

Respiration

DWI LEAF - ECleaf

DWI STEM - ECStem

DWI SHEATH - ECSheath

DWI ROOTS - ECRoot

DWI S. ORGANS -ECSO-

* FRorg

DVSDVS

BioKenaF: Relation diagramLightTemp

Photosynthesis

Developmentrate

Developmentstage

Partitioningcoefficients

Assimilatepool

Maintenancerespiration

BIOMASS

STEMS

ST. ORGANS

PETIOLES

ROOTS

LEAVES

LAI

Gro

wth

CONV.EFF.

SLA

BioKenaF: Relation Diagram

Application

HARDWARE

• Processor: AMD ATHLON XP 2800+

• Motherboard: Gigabyte 7N400-Pro

• RAM: 1 GB 400 Mhz

• Hard disk: W.Digital 160 GB

• Graphics: GA 6600 GT 128 MB Ram

SOFTWARE

• Microsoft Visual Basic 6

• Microsoft Excel 2000

• Helexis Icon Catcher v3.0

• Microsoft Paint for windows XP

SIMULATION TIME

4 sec

13 sec including exportation to MS Excel

BioKenaF application

Interface

Input Form

BioKenaF application

Soil Type

Input Form

BioKenaF application

Irrigation

Data

Manager

BioKenaF application

Editor of Meteorological

Data Files

Results

total

stem

leaves

petioles

Palamas- Karditsa (Greece) Year 2003, 100% Irrigation

Results

Palamas- Karditsa (Greece) Year 2003, 50% Irrigation

0

5000

10000

15000

20000

25000

150 200 250 300 350

J. Day

Kg

r / h

a

total

stem

leaves

petioles

Results

Palamas- Karditsa (Greece) Year 2003, 25% Irrigation

0

5000

10000

15000

20000

25000

150 200 250 300 350

J. Day

Kg

r /

ha total

stem

leaves

petioles

Results

Italy Bolognia Year 2003, potential productivity

Sowing date 19/6/2003

0

5000

10000

15000

20000

25000

150 200 250 300 350

J. Day

Kg

r /

ha

Sowing date 19/5/2003

0

5000

10000

15000

20000

25000

150 200 250 300 350

J. Day

Kg

r /

ha

Results

Italy Bolognia Year 2004, potential productivity

2004 S1

0

5000

10000

15000

20000

25000

150 200 250 300 350 400

J. Day

Kg

r /

ha

2004 S2

0

5000

10000

15000

20000

25000

150 200 250 300 350 400

J. Day

Kg

r /

ha

Results

total

stem

leavespetioles

France- Nicae Year 2005, potential productivity

0,00

5000,00

10000,00

15000,00

20000,00

25000,00

150 200 250 300 350

J. Day

Kg

r /

ha

Results

Greece Year 2003

Results

Greece Year 2004

Results

Greece Year 2005

Results

Bolognia Year 2003

Results

Bolognia Year 2003

Results

France Year 2004

Results

Summary

Missing Data

XXXXXXXXXX2004

XXXXXXXXXX2003France

XXXXXXX?XX2005

XXXX?2004CETA

XXXXX?2003Greece

XXXXXX2005

XXXXXX2004

XXXXXX2003Spain

XX2005

XXProblem

2004

XXXX2003Catania

XXX2005

XXXXXXXXXXX2004

XXXXXXXXXXX2003Portugal

G. WaterSoil TypeIrrigationHarvestsDay of Emer.RHWindPrecipitationRadiationTMINTMAXYearLocation

Wheather

Thank you for your attention !