Promotion of Flowering by Bulb-type Three-color Mixed LEDs in <i>Gypsophila paniculata</i> L.

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  • 電球型3色混合LEDランプによるシュッコンカスミソウの花成促進
  • デンキュウガタ 3ショク コンゴウ LED ランプ ニ ヨル シュッコンカスミソウ ノ カセイソクシン

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Abstract

<p>Incandescent light bulbs are widely used in light culture to promote flowering in long-day cut flowers. However, alternative energy-efficient light sources need to be developed. This study evaluated the flowering-promoting effect of two bulb-type three-color LEDs on two Gypsophila paniculata cultivars. The LEDs are equipped with far red, red, and blue colors and can be attached to the socket of an incandescent light bulb. Regarding the number of days to flower budding, LEDs exerted a flowering-promoting effect equivalent to that of incandescent light bulbs. However, incandescent light bulbs were more effective compared with LEDs in terms of the number of days to flowering in one of the two cultivars and number of leaves at flowering in both cultivars. The LED use resulted in an equal or superior fresh weight, stem length, and number of inflorescence units as the cut flower quality than those achieved with incandescent light bulbs. Although there may be an influence of light quality other than the three colors on flowering, the potential of bulb-type three-color mixed LEDs with a marked energy-saving effect was shown for the promotion of flowering.</p>

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