תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםLiu, H. - Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College ofWater Sciences, Beijing Normal University, Beijing, 100875, Chinaץ
Yin, C. - College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
Hu, X. - School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
Tanny, J. - Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Centre, P.O. B 15159 Rishon, LeZion, 7505101, Israel; HIT-Holon Institute of Technology, POB 305, Holon, 5810201, Israel
Tang, X. - Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, 100875, China
In north China, vegetables are always cultivated in conventional solar greenhouses (SG), however, these structures cannot be used during most of the winter due to extremely low temperatures. In this study, a new type of a solar greenhouse named sunken solar greenhouse (SSG), where the inside soil surface is lowered 1-2 m below outside and the back wall is 5-8 m width at the bottom and 1.5-2 m on top, was investigated. Inside climatic variables were recorded and compared with those outside during seven cucumber cultivation seasons. Crop evapotranspiration (ETc) was estimated using the Penman-Monteith method. Results show that inside solar radiation was reduced by approximately 40%, however days with a daily maximum inside temperature higher than 20 °C accounted for 80-90% of the days during the winter, which greatly enhanced cucumber fruit production compared to common SGs. The reference crop evapotranspiration (ETo) inside the SSG was reduced by 27% compared to outside. The estimated ETc was generally lower than 4 mm day-1, which resulted in a basal crop coefficient of 0.83. In conclusion, the SSG is environmental-friendly, preferable for winter vegetable cultivation in north China, and can be useful for other regions of the world with cold winter conditions.
Liu, H. - Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College ofWater Sciences, Beijing Normal University, Beijing, 100875, Chinaץ
Yin, C. - College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
Hu, X. - School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
Tanny, J. - Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Centre, P.O. B 15159 Rishon, LeZion, 7505101, Israel; HIT-Holon Institute of Technology, POB 305, Holon, 5810201, Israel
Tang, X. - Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, 100875, China
In north China, vegetables are always cultivated in conventional solar greenhouses (SG), however, these structures cannot be used during most of the winter due to extremely low temperatures. In this study, a new type of a solar greenhouse named sunken solar greenhouse (SSG), where the inside soil surface is lowered 1-2 m below outside and the back wall is 5-8 m width at the bottom and 1.5-2 m on top, was investigated. Inside climatic variables were recorded and compared with those outside during seven cucumber cultivation seasons. Crop evapotranspiration (ETc) was estimated using the Penman-Monteith method. Results show that inside solar radiation was reduced by approximately 40%, however days with a daily maximum inside temperature higher than 20 °C accounted for 80-90% of the days during the winter, which greatly enhanced cucumber fruit production compared to common SGs. The reference crop evapotranspiration (ETo) inside the SSG was reduced by 27% compared to outside. The estimated ETc was generally lower than 4 mm day-1, which resulted in a basal crop coefficient of 0.83. In conclusion, the SSG is environmental-friendly, preferable for winter vegetable cultivation in north China, and can be useful for other regions of the world with cold winter conditions.
