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The generic plant growth model PLATHO (PLAnts as Tree and Herb Objects) was developed and parametrised for several plant species investigated in SFB 607. The model evaluation is still in process.
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Main progresses in phase II and III of the SFB were:
- the development of a new mechanistic modelling approach for the simulation of environmental factors on ressource allocation into the pool of defensive compounds.
- the development of a modelling approach for the simultaneously simulation of several interacting plant individuals differing in start values of state variables and in ecophysological parameters.
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Examples of model applications
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Figure 1: Simulation of resource allocation into the pool of defensive compounds during one vegetation period in a scenario for young apple trees. Allocation to defense strongly depends from plant internal availability of carbon and nitrogen.
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Figure 2: Simulated and measured effect of three nitrogen fertilisation levels on growth and defensive compounds formation of young apple trees (data from A8).
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Figure 3: Simulated versus measured mean values of aboveground biomass of juvenile beech and spruce trees grown in mono- and mixed cultures under different CO2 and O3 regimes
(V80/V90: Phase I; V91/V92 Phase II, data from B5).
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Figure 4: Relation between actual growth rate and potential allocation rate to the defensive compounds pool, depending on the maximal growth rate.
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Figure 5: Relation between optimal allocation rate to the defensive compounds pool and maximal growth rate.
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