ISHS Acta Horticulturae 148: III International Symposium on Energy in Protected Cultivation
PHYSIOLOGICAL ASPECTS OF OPTIMAL CO2-CONTROL IN PROTECTED CULTIVATION |
| Authors: | A.H.C.M. Schapendonk, P. Gaastra |
| Abstract:
The CO2-concentration in glasshouses is determined by net crop photosynthesis, ventilation and CO2-enrichment. This study presents a simulation model that quantifies these relations with special emphasis on the effect of CO2-depletion on crop production under normal dutch glasshouse management. From the results obtained with the model it is concluded that in early spring the production of an undeterminate growing crop in its production phase is decreased by 13 to 17% due to CO2-depletion in the glasshouse, despite the injection of CO2 from the combustion of natural gas in the heating system. Some economical aspects of CO2-enrichment both to 340 ppm and above that level are discussed in relation to ventilation-temperature setpoint. | |
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