ISHS Acta Horticulturae 42: Symposium on Cultivation of Vegetables under Protection in the Mediterranean Regions
STUDY ON TEMPERATURE GRADIENTS AND PROFILES IN GREENHOUSES |
| Authors: | P.F. Martinez, J. Miranda |
| Abstract:
Owing to the importance of good knowledge of glasshouse microclimate for planning of tests with plant material and because of lack of these studies in Spain, a research was carried out concerning the glasshouse temperature distribution during wintertime. Vertical and horizontal temperature profiles and gradients, as well as windspeed effect on them, were studied. Results showed the persistence of vertical and horizontal temperature gradients during the winter months, resulting in higher temperatures in the southern side of the greenhouse. A relationship was observed between wind speed and vertical temperature gradient; a reduction of the latter corresponding to an increase of the former. The regression analysis showed the existence of quadratic relationships between both variables. These equations are different for each level studied. Linear relationships were found for the night. | |
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