1. General Model Information

Name: HORTISIM 1.0 - Greenhouse and crop simulator.


Main medium: terrestrial
Main subject: horticulture
Organization level: Organ
Type of model: ordinary differential equations
Main application:
Keywords: greenhouse, photosynthesis, growth, dry matter production, transpiration


Dr. Ep Heuvelink.
Leerstoelgroep Tuinbouwproductieketens Bode 40 Postbus 9101 6700 HB Wageningen the Netherlands
Phone: +31 317 4 83679
Fax: +31 317 4 84709
email: ep.heuvelink@hpc.dpw.wau.nl



HORTISIM is a mechanistic simulation model for crop growth, the greenhouse climate and their interaction. It calculates photosynthesis, dry matter production and transpiration for an average C3 greenhouse crop (assuming a closed or a row canopy) and the dry matter production and dry matter partitioning of indeterminate vegetable fruit crops (tomato, cucumber, sweet pepper, melon). It quantifies the energy, CO2 and water use. It can evaluate a variety of climatic condition, crop management practices and greenhouse designs. The program has advances possibilities to configure the model by switching of modules or replacing their functions by facing functions.

Purpose of the model:

Model parentage: SUCROS and derived models (ASKAM*, TOMSIM), TOMGRO.

Source of the AbstractCAMASE Register of Agro-ecosystems Models

II. Technical Information

II.1 Executables:

Operating System(s): 486 PC or higher, equivalent MAC, 8 Mb RAM. Contract necessary: Costs: : - Comments:

II.2 Source-code:

Programming Language(s): Microsoft FORTRAN with FORTRAN '90 elements.

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

Rate variables: Photosynthesis, transpiration, dry matter production, fruit growth, fruit production, energy use, CO2 use, water use.

State variables: Air temperature, CO2 concentration, air humidity, crop weight, leaf area index, fruit number, fruit fresh weight.

III.2.1 Input

Weather outside greenhouse (global radiation, air temperature, humidity, wind speed and direction) or climate inside (global radiation, CO2 concentration, air temperature). Input check in model: Yes.

III.2.2 Output

All state variables, all rate variables, balances, cumulative variables.
Basic spatial unit: m2.
Time interval of simulation: Cropping season, with steps of 1 minute to 1 day.

IV. References

Gijzen, H., 1996. HORTISIM, a general purpose greenhouse and crop simulator. Quantitative Approaches in Systems Analysis (In press).

V. Further information in the World-Wide-Web

  • VI. Additional remarks

    Parentage: SUCROS and derived models (ASKAM*, TOMSIM), TOMGRO.
    Last review of this document by: T. Gabele: Tue Sep 24 1997
    Status of the document:
    last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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