Simulation of the Canopy Photosynthesis Model of Greenhouse Tomato

In order to improve the productivity and the production efficiency of the greenhouse, the canopy photosynthesis model of tomato – one of the main species cultivated in greenhouse was developed based on simple leaf photosynthesis, after the comprehensive consideration of leaf area index and light density distribution in greenhouse. At the same time, the model has considered the influence of the environment (temperature, CO2 concentration and moisture). Utilizing the test data materials to evaluate the model, the simulation result shows that the relative error of photosynthetic rate between observed value(except for 0) and simulated value is 0∼10.0% and they had good consistency. The model developed in this study could give satisfactory predictions of the variation of photosynthetic rate, which established the foundation for the next study on the effects of environmental factor on the growth and further automatic control of greenhouse tomato production.