ROOT VEGETABLE PRODUCTION UNDER HYBRID ELECTRODE FLUORESCENT LAMPS (HEFL)

We propose a new plant factory model using a new type of light source (HEFLs). Research and practical application have been performed using this light source for leafy vegetables, but not for root vegetables.
In this research we cultivated radishes hydroponically and in vermiculite, and with both methods we succeeded in crop production that could be commercialized, but we found that radishes could be harvested 4 days earlier when grown hydroponically.
Under the conditions of this research we found that radishes grow fastest with a photosynthetic photon flux density (PPFD) of 150 µmol m^-2 s^-1 and 24-h irradiation.

VI International Symposium on Light in Horticulture

S. Harada, K. Yumoto, T. Ikeda

hydroponics, photoperiod, plant factory, PPFD, radish

https://doi.org/10.17660/ActaHortic.2011.907.17