ISHS Acta Horticulturae 174: Symposium Greenhouse Climate and its Control
PLANT GROWTH OPTIMISATION BY PHOTOSYNTHETIC MONITORING |
| Author: | R.J. Ceulemans |
| Abstract:
A new technological system is being developed that incorporates computer control of the greenhouse climate by monitoring the plant net CO2 uptake rates. By means of the speaking plant approach and the hill climbing procedure the main abiotic growth factors are optimized through direct, digital computer control. The knowledge of the optimal matrix of air temperature, atmospheric humidity, CO2-concentration and ventilation is a basic prerequisite for this plant controlled climate programming. Finding the optimal combination of environmental factors in the computer-aided cultivation is performed by maximization of plant net CO2 exchange rates. The proposed innovative development can be implemented in climatisation techniques of plant growth units (plant productivity under completely controlled environmental conditions) or in existing computer directed greenhouses. Further possible applications include physiological process control in plant cultivation and optimization of plant growth and productivity. The specific equipment includes a controlled environment plant growth unit, water vapour and CO2-gas analysis unit, microprocessor, datalogger and computer instrumentation. | |
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