Variation of CO2 Concentration in Greenhouses and Effects on Growth and Yield in Alstroemeria with CO2 Supplementation
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We analyzed the variations in the CO2 concentration and temperature between a CO2-enriched and control greenhouse. We cultivated Alstroemeria ‘Hanhera’ in the two greenhouses and assessed the growth parameters (stem length, stem thickness, and the number of flowers) and yield. The CO2-enriched greenhouse had a CO2 generator that produced CO2 at rate of 0.36 kg/h and its windows were programmed to open when the temperature exceeded 20℃ and close when it dropped below 15℃. The control greenhouse had no additional CO2 supplementation, and its windows were programmed to open when the temperature exceeded 20℃ and close at approximately 17:00. In the morning, CO2 concentration remained above 500 ppm in the CO2-enriched greenhouse, which was higher than that in the control greenhouse (approximately 370 ppm). The ventilation effect only through the side windows to reduce the temperature in both greenhouses did not appear dynamically. CO2 supplementation promoted plant growth, resulting in a significant increase in plant yield of over 60% compared to that of the control greenhouse. Our findings suggest that elevated CO2 concentration in the morning can significantly promote the growth and development of Alstroemeria during the winter.
Abstract
We analyzed the variations in the CO2 concentration and temperature between a CO2-enriched and control greenhouse. We cultivated Alstroemeria ‘Hanhera’ in the two greenhouses and assessed the growth parameters (stem length, stem thickness, and the number of flowers) and yield. The CO2-enriched greenhouse had a CO2 generator that produced CO2 at rate of 0.36 kg/h and its windows were programmed to open when the temperature exceeded 20℃ and close when it dropped below 15℃. The control greenhouse had no additional CO2 supplementation, and its windows were programmed to open when the temperature exceeded 20℃ and close at approximately 17:00. In the morning, CO2 concentration remained above 500 ppm in the CO2-enriched greenhouse, which was higher than that in the control greenhouse (approximately 370 ppm). The ventilation effect only through the side windows to reduce the temperature in both greenhouses did not appear dynamically. CO2 supplementation promoted plant growth, resulting in a significant increase in plant yield of over 60% compared to that of the control greenhouse. Our findings suggest that elevated CO2 concentration in the morning can significantly promote the growth and development of Alstroemeria during the winter.
참고문헌 (23)
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