Journal of Agricultural Machinery Engineering ISSN:2799-8673(Print) 2799-8819(Online) 농업기계공학

CO2 fertilization is very critical for plants in a greenhouse because CO2 is insufficient after sunrise due to the photosynthesis. This study reported the variation of CO2 concentration in greenhouse and the effect of greenhouse plants on CO2 fertilization. Alstroemeria were cultivated in CO2 fertilization greenhouse and non- CO2 fertilization greenhouse (Control house). To supply CO2 , we set a catalyst-type CO2 generator at fertilization greenhouse and it generated 0.36kg/h CO2 . The CO2 concentration at CO2 fertilization greenhouse was maintained about 640 ppm from 6:00 to 10:00. The result reported that CO2 fertilization significantly increased the weekly yield and shoot length. There was slightly increase at total number of flowers and stem thickness despite of no statistical significance. According to these positive results, we considered that future studies would be aimed at experiments with bigger scale and more details.