Journal of Animal Environmental Science ISSN:1226-0274(Print) 축산시설환경학회지

The areas of vinyl greenhouse have steadily grown in Korea. Climate condition is far from optimal inside vinyl greenhouses because of the limited ventilation and lack of cooling and heating. Carbon dioxide was more than 50% higher than pre-industrial levels. Agricultural activities are estimated to account for about 13.5% of the total greenhouse gas. The objective of this study was to predict the CO₂ concentration and temperature in the inside and outside of vinyl greenhouse applied compost and liquid fertilizer. In this study, we compared the CO₂ concentration and temperatures inside and outside greenhouses. The investigation was performed in 54 vinyl greenhouses located in Yeoju and Boryeong regions, Korea. The CO₂ concentration inside and outside of vinyl greenhouse were measured in the period from 2021 to 2022. The mean CO₂ concentration inside a greenhouse in the Yeoju and Boryeong was 499.6 and 516.2 ppm, respectively. Inside the greenhouse, the highest mean CO₂ concentration had values of 600.8 ppm, and the minimum level of CO₂ was 477 ppm in Boyeong. The seasonal CO₂ concentration was observed in March and April with a maximum occurrence and in July-August with a minimum occurrence. The average CO₂ concentration of inside the vinyl greenhouse is 10.1 ppm higher than that of outside atmospheric CO₂ concentration. During summer season, inside temperatures was high as 31.9~33.7°C. The difference between the inside and outside temperatures of vinyl house was around 1~3°C. Therefore monitoring of CO₂ concentration and temperature of vinyl greenhouse is needed.