ISHS Acta Horticulturae 229: Symposium on Biological Aspects of Energy Saving in Protected Cultivation
THE EFFECTS OF HUMIDITY ON GROWTH AND PRODUCTION OF GLASSHOUSE CUCUMBERS, TOMATOES AND SWEET PEPPERS |
| Author: | J.C. Bakker |
| Abstract:
The effects of day and night humidity on growth and production of autumn and spring grown cucumbers, tomatoes and sweet peppers were investigated in a series of glasshouse experiments. With cucumber vegetative growth was enhanced by either high day or night humidity. A significant correlation was found between vapour pressure deficit by day and final yield. Final yield of tomatoes was increased by low humidity by night or 24-h average. Calcium deficiency in leaves of cucumber and tomato was closely correlated to 24-h average humidity. No significant correlation was found between final yield of sweet pepper and vapour pressure deficit by day, by night or 24-h average. Vegetative growth of sweet pepper was also not significantly affected by environmental humidity. Fruit quality of all three crops was reduced by high 24-h average humidities. | |
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