This study was conducted to investigate cucumber plants response to greenhouse environments by solar shading in greenhouse in the summer. In order to estimate heat stress reduction of cucumber plants by solar shading in greenhouse, we measured and analyzed physiological conditions of cucumber plants, such as leaf temperature, leaf-air temperature, rubisco maximum carboxylation rate, maximum electron transport rate, thermal breakdown, light leaf respiration, etc. Shading levels were 90% mobile shading of full sunlight, 40% mobile shading of full sunlight and no shading(full sunlight). The 90% shading screen was operated when the external solar radiation is greater than 650 W·m-2. Air temperature, solar radiation, leaf temperature, leaf-air temperature and light leaf respiration in the 90% shading of full sunlight was lower than those of 40% shading and no shading. Rubisco maximum carboxylation rate, arrhenius function value and light leaf respiration of the 90% shading were significantly lower than those of 40% shading and no shading. The thermal breakdown, high temperature inhibition, of 90% shading was significantly higher than that of 40% shading and no shading. Therefore, these results suggest that 90% mobile shading made a less stressful growth environment for cucumber crops.

Abstract
서 론
재료 및 방법
결과 및 고찰
적 요
Literature Cited

• 김동억(국립한국농수산대학 교양공통과) | Dong Eok Kim (Department of General Education, Korea National College of Agriculture and Fisheries)
• 권진경(국립농업과학원 에너지환경공학과) | Jin Kyung Kwon (Energy and environmental engineering division, National institute of Agricultural Science, RDA)
• 홍순중(국립한국농수산대학 교양공통과) | Soon Jung Hong (Department of General Education, Korea National College of Agriculture and Fisheries)
• 이종원(국립한국농수산대학 원예환경시스템학과) | Jong Won Lee (Department of Horticulture Environment System, Korea National College of Agriculture and Fisheries)
• 우영회(국립한국농수산대학 원예환경시스템학과) | Young Hoe Woo (Department of Horticulture Environment System, Korea National College of Agriculture and Fisheries) Corresponding author