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Development of Multi-span Plastic Greenhouse for Tomato Cultivation  

Yu, In Ho (Protected Horticulture Research Station, NIHHS, RDA)
Lee, Eung Ho (Protected Horticulture Research Station, NIHHS, RDA)
Cho, Myeong Whan (Protected Horticulture Research Station, NIHHS, RDA)
Ryu, Hee Ryong (Protected Horticulture Research Station, NIHHS, RDA)
Kim, Young Chul (Protected Horticulture Research Station, NIHHS, RDA)
Publication Information
Journal of Bio-Environment Control / v.21, no.4, 2012 , pp. 428-436 More about this Journal
Abstract
This study aimed to develop the multi-span plastic greenhouse which is suitable for tomato cultivation and is safe against climatic disasters such as typhoon or heavy snow. The width and heights of eaves and ridge of newly developed tomato greenhouse are 7, 4.5 and 6.5 m, respectively. The width is the same but the eaves and ridge heights are 1.8 and 2 m higher than conventional 1-2 W greenhouses, respectively. Cross beam has been designed as a truss structure so it can sustain loads of tomato and equipment. Tomato greenhouse has been designed according to climatic disaster preventing design standard maintaining the high height. In other words, the material dimensions and interval of materials including column and rafter have been set to stand against $40m{\cdot}s^{-1}$ of wind and 40 cm of snow. Tomato greenhouse has been equipped with rack-pinion type roof vents which have been used in glass greenhouse in order to prevent excessive rise in air temperature. This vent type is different from that of 1-2 W type greenhouse which is made by rolling up and down the vinyl at upper part of column. Roof vents are installed at ridge, and thus external air inflow and natural ventilation are maximized. As the height increases, heating cost increase as well and, therefore, tomato greenhouse has been equipped with multi-layered thermal curtain, of which thermo-keeping is excellent, to prevent heat from escaping.
Keywords
dead load; plastic greenhouse; structural safety; survey; tomato;
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Times Cited By KSCI : 1  (Citation Analysis)
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