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The objective of this research was to evaluate the effect of different greenhouses heights and levels of shading on the growth of Aechmea fasciata and Guzmania lingulata (Bromeliaceae). The experiment was done from march 26’th of 2001 to april third of 2002, in two greenhouses, built in east-west orientation, at the experimental area of Nucleos of Environment Research – NUPEA, Rural Engineering Department, “Luiz de Queiroz” College of Agriculture, University of Sao Paulo, Piracicaba, Brazil. Greenhouses measured: 6.4m in width, 17.5m in length and heights of 3.0m and 3.5m. They were covered with 150μ thick low density polyethylene (PEBD). Black polypropylene cloth providing shading of 18%, 40%, 60%, and 80% was used. The plants used in the experiment were obtained through micropropagation and transplanted to plastic pots at approximately 90 days after ex vitro culture. The air temperature, the relative humidity, the black globe temperature, the radiant thermal load, and light intensity were evaluated inside the greenhouses. These evaluations were carried out through the direct reading from the following instruments: psycrometers, black globe thermometer, anemometer and digital luximeter. Air temperature, relative humidity and global

Desenvolvimento de bromélias em ambientes protegidos com diferentes alturas e níveis de sombreamento.