Understanding the light environment in greenhouse cultivation and the light utilization characteristics of crops is important in the study of photosynthesis and transpiration. Also, as the plant grows, the form of light utilization changes. Therefore, this study aims to develop a light extinction coefficient model reflecting the plant growth. To measure the extinction coefficient, five pyranometers were installed vertically according to the height of the plant, and the light intensity by height was collected every second during the entire growing season. According to each growth stage in the early, middle, and late stages, the difference between the top and bottom light intensity tended to increase to 69%, 72%, and 81%. When leaf area index and plant height increased, the extinction coefficient decreased, and it showed an exponential decay relationship. Three-dimensional model reflecting the two growth indexes, the paraboloid had the lowest RMSE of 1.340 and the highest regression constant of 0.968. Through this study, it was possible to predict the more precise light extinction coefficient during the growing period of plants. Furthermore, it is judged that this can be utilized for predicting and analyzing photosynthesis and transpiration according to the plant height.

Abstrac
서 론
재료 및 방법
    1. 생육조건 및 작물관리
    2. 데이터 수집 및 생육측정
    3. 흡광계수 측정 방법
    4. 통계 및 데이터 분석
결 론
적 요
사 사
Literature Cited

• 전기범(국립안동대학교 대학원 원예육종학과 대학원생) | Ki Beom Jeon (Graduate Student, Department of Horticulture and Breeding, College of Life Science and Biotechnology, Andong National University)
• 신종화(국립안동대학교 생명과학대학 원예육종학과 교수) | Jong Hwa Shin (Professor, Department of Horticulture and Breeding, College of Life Science and Biotechnology, Andong National University) Corresponding author