Can the light spectrum be used to replace the cooling phase in Phalaenopsis?

Gepubliceerd op
20 februari 2014

After the propagation phase, Phalaenopsis requires a cooling period of approximately 8 weeks to induce flowering. Until that time, a high temperature is maintained to prevent flowering. Growing Phalaenopsis is not season bound and that means that cooling requires a great deal of energy, especially in the summer months. Together with Plant Lighting and Plant Dynamics, Wageningen UR Greenhouse Horticulture has sought opportunities to (partly) replace the cooling by using steering light.

It is theoretically possible to force bud break and induce flowering by changing the far red:red light ratio. By proper use of these parts of the light spectrum, a higher greenhouse air temperature can be allowed while inducing flowering and the of flower induction phase might even be shortened. This hypothesis will be tested in an experiment to begin soon at Wageningen UR Greenhouse Horticulture in Bleiswijk .