EFFECT OF LIGHT REGIME ON GROWTH AND FLOWERING OF PHALAENOPSIS ORCHID

R. Paradiso , S. De Pascale
We investigated the effects of supplemental lighting, applied during the 60-day phase of flower induction, on growth and flowering of Phalaenopsis ‘Premium’, grown in pot. The experiment was carried out in Naples (40°51’ N, 14°22’ E), in an heated glasshouse. Plants were submitted to two lighting regimes, natural lighting and supplemental lighting. Supplemental lighting was performed by using High Pressure Sodium lamps, to provide an additional photosynthetic photon flux density (PPFD) of 150 mol m-2 s-1, at the canopy level. The effects of treatments were studied in terms of plant growth, flowering time and flower stem production and characteristics. Supplemental lighting slightly anticipated flowering compared to natural lighting (144 vs. 150 days from the beginning of treatment) and positively influenced plant architecture, promoting the emission of the second flower stem and the flower stem branching.
Paradiso , R. and De Pascale, S. (2012). EFFECT OF LIGHT REGIME ON GROWTH AND FLOWERING OF PHALAENOPSIS ORCHID. Acta Hortic. 952, 329-334
DOI: 10.17660/ActaHortic.2012.952.41
https://doi.org/10.17660/ActaHortic.2012.952.41
potted plant, flower induction, plant architecture, supplemental lighting, lamps
English

Acta Horticulturae