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Microclimatic modifications due to the use of plastic greenhouse

The use of plastic greenhouse has increased in southern Brazil, but the modifications in the microclimate are not well known. Therefore, this research was developed at Campinas, State of São Paulo, Brazil, aiming to characterize the changes in air temperature and humidity and soil temperature in a low texture plastic greenhouse. The results showed that the values of maximum air temperature were higher in the greenhouse when compared to outside and the highest values were avoided by opening the side courtines. During cool nights, mainly, with clear sky and no wind, when the temperature reached values below 10°C, the minimum air temperature values in the greenhouse were higher than the observed in the open field plot. The relative humidity, when the greenhouse was closed, showed higher values than at the open greenhouse conditions when the humidity was equal to the external conditions. Also it was possible to notice that the maximum and minimum soil temperature showed higher values in the greenhouse.

greenhouse; microclimate


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