Hortisim: a model for greenhouse crops and greenhouse climate

H. Gijzen, E. Heuvelink, H. Challa, E. Dayan, L.F.M. Marcelis, S. Cohen, M. Fuchs

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

59 Citations (Scopus)


A combined model for crop production and climate in greenhouses, HORTISIM, was developed. Existing models, developed by several research groups, of various aspects of crop growth and greenhouse climate have been integrated. HORTISIM contains 7 submodels (Weather, Greenhouse Climate, Soil, Crop, Greenhouse Manager, Soil Manager and Crop Manager) plus a simulation process manager (the “Engine”). Climate conditions inside the greenhouse can be calculated from outdoor weather. The use of energy, CO2 and water can be quantified. Crop photosynthesis, dry matter production, dry matter partitioning and individual fruit growth in fruit vegetable crops can be simulated. Validation of the energy balance of a Venlo-type glasshouse with a tomato crop in The Netherlands showed that difference between simulated and measured instantaneous air temperature was mostly less than 2°C (average deviation was 0.53°C). Crop transpiration and dry matter production have been validated for Dutch and Israeli conditions. Daytime crop transpiration was simulated reasonably well, being overestimated on average by 8 percent for tomato in The Netherlands and 1 percent for sweet pepper in Israel. The Israeli results were quite sensitive to the choice of using mid-canopy or above-canopy temperature and VPD measurements as model input. In many situations simulated dry matter production agreed well with experimental data, although dry matter production of sweet pepper in Israeli greenhouses was overestimated by 28 percent. Dry matter partitioning in sweet pepper was simulated rather well when simulation was
Original languageEnglish
Title of host publicationProceedings of the Second International Symposium on Models for Plant Growth, Environmental Control and Farm Management in Protected Cultivation
EditorsL.F.M. Marcelis
Publication statusPublished - 1998

Publication series

NameActa Horticulturae
ISSN (Print)0567-7572


  • computer simulation
  • simulation
  • simulation models
  • models
  • research
  • greenhouses
  • climate
  • greenhouse horticulture


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