• 作者： 申雍; 陳鈐鈴
• 作者服務機構： 國立中興大學土壤學系
• 中文摘要： 本研究於台灣台中，對夏天入射的光合作角有效輻射、全日射量及日射光譜進行測定。與標準的日射光譜比較，在台灣地區測得之光合作用有效輻射中，藍光波段的能量增多，而綠光與紅光波段的能量減少，光合作用光子通量密度與光合作用輻射量間的轉換係數為0.213W（方程式無法摘錄），此轉換係數適用於多種的天氣狀況。若要由測得的全日射量估算光合作用光子通量密度，可依天空雲量分為晴朗至少雲及密雲兩種狀況，分別使用2.14μEJ和2.39μEJ做為轉換係數；若需估算光合作用輻射量，則對應的轉換係數分別為46％和51％。
• 英文摘要： The amount of photosynthetically active radiation, total solar irradiance, and solar spectra weremeasured in summer in Taichung, Taiwan. Spectral distribution of photosynthetically active radiation in-dicated that there was more blue light but less green to red light compared with that of the standard solarspectrum. A conversion factor of 0.213 W per (方程式無法摘錄) was suitable for converting photosyntheticphoton flux density to photosynthetic irradiance under various sky conditions. To estimate the photo-synthetic photon flux density from measured solar irradiance, conversion factors of 2.14μEJ and 2.39μEJμEJ, were suitable for clear to partly-cloudy and overcast skies, respectively. Corresponding values forconverting to photosynthetic irradiance were 46% and 51%, respectively.
• 中文關鍵字： global radiation; quantum efficiency.
• 英文關鍵字： --