Abstract
The effects of daytime heating on the quantity of fertile pollen were examined in forcing cultures of eggplants ‘Senryo’. Small greenhouses were installed within a greenhouse, and each small greenhouse was warmed to a different minimal day temperature using an electric heater. When the plants were cultivated while maintaining a daytime temperature above 25°C, the weight of fertile pollen increased during the winter and the yields of normal fruit increased. In addition, with regard to the heating time, heating the greenhouse for 3 h around noon showed an effect similar to that of heating for 9 h from 8:00 to 17:00.
