Effect of Pulsed Lighting from Yellow Fluorescent Light Emitting Diodes on the Budding, Flowering, and Flower Characteristics of Small-flowered Spray-type Chrysanthemums

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  • Ishikura Satoshi
    Hiroshima Prefectural Technology Research Center, Agricultural Technology Research Center Graduate School of Natural Science and Technology, Okayama University
  • Goto Tanjuro
    Graduate School of Environmental and Life Science, Okayama University
  • Kajihara Shinji
    Hiroshima Prefectural Technology Research Center, Agricultural Technology Research Center
  • Higashiura Masaru
    Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries

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  • 黄色蛍光LEDによるパルス光照射が数種小ギク品種の発蕾，開花および切り花形質に及ぼす影響
  • キイロ ケイコウ LED ニ ヨル パルスコウ ショウシャ ガ スウシュ ショウギク ヒンシュ ノ ハツツボミ,カイカ オヨビ キリバナ ケイシツ ニ オヨボス エイキョウ

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Abstract

We describe the use of pulsed lighting from yellow fluorescent light emitting diodes (LEDs) designed for moth control in the cultivation of small-flowered spray-type chrysanthemums. The pulses had a 20 ms pulse width and a 80 ms dark period. The effects of the irradiance of pulsed light (0, 20, 35 and 50 mW·m−2) on the flowering and the cut flower characteristics have been investigated. No significant differences were found in the number of days to flower budding and flowering, flower formation, and on the cut flower characteristics grown using an irradiance of 20 mW·m−2. However, in some cultivars, the number of days to flowering and the cut flower length of plants exposed to 35 and 50 mW·m−2 irradiance increased significantly compared to unexposed plants.<br>

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