Naturally ventilated shade house structure and operational systems for medicinal plant cultivation
2002
Rezuwan Kamaruddin, MARDI Headquarters, 43400 Serdang, Selangor (Malaysia). Structures and Controlled Environment Mechanization and Automation
Malaysia has thousand varieties of potential medicinal plants for quality herbal product development. At present, most of the plants grow naturally under variation of rain forest's shades. Supply of raw materials from natural sources is scares, unreliable and unsustainable. Hence the need of a modern herbal production system using controlled environment such as under naturally ventilated shade house structure. This paper discusses the design concept and development of shade house structure, naturally controlled environment and operational production systems for selected medicinal plants production. Emphasize will be given on creating a conducive growing environment in terms of light intensity, air temperature, relative humidity, carbon dioxide, ventilation, irrigation and mechanization under the structure. Considering engineering code of practices, plant physiology and climate requirements in the design will give an estimation of natural ventil ation rates induced by stack and wind effects. Natural ventilation is necessary to reduce in-house temperature, humidity as well as maintaining carbon dioxide concentration. The proposed shade house structure consists of simple structural frames, polyethylene shade net roofing and side cladding. Information on application of existing irrigation and mechanisation systems, for production operational system are also discussed.
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