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Intermittent Light from a Rotating High-pressure Sodium Lamp Promotes Flowering of Long-day Plants
Author(s): M. G. Blanchard and E. S. Runkle
Journal Link: http://hortsci.ashspublications.org/search.dtl
Article Topic(s): Light, Phenology
Research Setting(s): Greenhouse
Species Referenced: Rudbeckia hirta (Black-eyed susan),
AbstractEvaluates the effects of a new technology for long-day lighting on flowering of Rudbeckia hirta and Coreopsis grandiflora under commercial production. The new technology uses a stationary high-pressure sodium (HPS) lamp with an oscillating aluminum parabolic reflector. The HPS lamp can be used to efficiently deliver long-day, but flowering time was delayed and flower number reduced in some species when the maximum night interruption light intensity was less than 2.4 mu mol.m(-2).s(-1).
Suggested CitationM. G. Blanchard and E. S. Runkle. "Intermittent Light from a Rotating High-pressure Sodium Lamp Promotes Flowering of Long-day Plants." Hortscience 45.2 (2010): 236-241.
Article LinksISSN: 0018-5345