Reproductive development

Actual structure constrained by carbon allocation

Potential structure

Live computation

FSPM simulator

Each run recomputes structure, radiation, organ water balance, LUE, carbon allocation and yield.

Environment

Direct PAR W m⁻² Diffuse PAR W m⁻² Interval days / 100 GDD Temperature °C Available water L / interval VPD kPa N stress scalar 0–1 CO₂ modifier relative

Architecture & optics

Height scale relative Leaf size scale relative Shoots / branches maximum Leaf reflectance fraction Leaf transmittance fraction Radiation resolution triangles / organ

Physiology & allocation

Maximum LUE g MJ⁻¹ Base temperature °C Optimum temperature °C Maximum temperature °C Leaf mass / area g m⁻² Root : shoot target ratio Reproductive sink relative weight Transpiration g m⁻² s⁻¹

Structure ↔ function

Closed-loop state

Solved

01GeometryPotential frame
02RadiationTriangle transport
03LUEBiomass source
04AllocationFinite sinks
05FeedbackRealized frame

Radiation & physiologyCurrent frame

Canopy APAR—absorbed power

Green APAR—daylight interval

Effective LUE—g dry matter / MJ

Biomass source—this interval

Whole-plant outputLive simulation

Total biomass—structural dry matter

Estimated yield—harvestable dry matter

Harvest index—yield / biomass

Water stress—supply / demand

Organ carbon–water stateSelectable output

Organ

Carbon source—

Carbon allocation—

Structural biomass—

Absorbed PAR—

Water demand—

Water supply—

Organ water status—

Source–sink allocationPrevious growth step

Structural realizationActual / potential

Canopy height—

Potential—

Green leaf area—

Potential—

Leaf realization: —
Stem realization: —
Carbon reserve: —
Cumulative biomass: —

Demonstration forcing

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