赤色電球形蛍光ランプによる暗期中断時間と光強度がスプレーギクの開花と花房の形状に及ぼす影響  [in Japanese] Effects of Irradiation Time and Light Intensity for Night-break Using Compact Self-ballasted Fluorescent Lamps of Red Light on the Flowering and Spray Formation of Spray-type Chrysanthemums  [in Japanese]

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Abstract

赤色電球形蛍光ランプによる暗期中断時間と光強度がスプレーギクの開花と花房の形状に及ぼす影響について,秋ギク'ゴールドストックダークリネカー'および夏秋ギク'コイアローム'を用いて調べた.光源として,市販の白熱電球(対照光源,75 W)および660 nmの波長をピークにもち,赤色光を多く含む赤色電球形蛍光ランプ(21 W,試作品)を用いた.その結果,いずれの品種とも,商品価値の高い整った花房の形状を示す花芽分化抑制可能な光合成有効光量子束密度(PPFD)の下限値は,同じ暗期中断時間で比較すると,赤色電球形蛍光ランプを使用した場合に白熱電球を使用した場合より低かった.秋ギク品種では,赤色電球形蛍光ランプを使用して1時間の暗期中断を行った場合,花芽分化抑制可能なPPFDの下限値が示されたが,白熱電球を使用した場合では示されなかった.さらに,いずれの品種においても,赤色電球形蛍光ランプを使用した場合の花芽分化抑制可能なPPFDの下限値と,これに対応する暗期中断時間の積の値がほぼ一定になったことから,花芽分化抑制可能なPPFDの下限値と暗期中断時間は反比例の関係にあり,ブンセン-ロスコーの相反則が成り立っていると考えられた.<br>

The effects of the irradiation time and light intensity for night-break using compact self-ballasted fluorescent lamps of red light on the flowering and spray formation of spray-type chrysanthemums were investigated with two types of cultivar, the autumn-flowering cultivar ‘Lineka Dark’ and the summer-to-autumn-flowering cultivar ‘Koiaromu’. Compact self-ballasted fluorescent lamps of red light (21 W), which have rich red light with a peak wavelength of 660 nm developed as a trial model, and incandescent lamps (75 W) as a control were used for light sources. The minimum photosynthetic photon flux density (PPFD) for the inhibition of flower bud initiation, resulting in normal spray flower formation, by irradiation with the compact self-ballasted fluorescent lamps of red light was smaller than that by irradiation with incandescent lamps under the same night-break time. In the autumn-flowering cultivar, the minimum PPFD for the inhibition of flower bud initiation was identified under 1-h night-break treatment with compact self-ballasted fluorescent lamps of red light, whereas no value was indicated with incandescent lamps. In the autumn-flowering and summer-to-autumn-flowering cultivars, as the product of the minimum PPFD and irradiation time was almost constant by irradiation with compact self-ballasted fluorescent lamps of red light, it is considered that the minimum PPFD is inversely related to the irradiation time on minimum fluence. These results indicate that the product of the minimum PPFD and irradiation time can be explained by the Bunsen-Roscoe law of reciprocity.<br>

Journal

  • Horticultural Research (Japan)

    Horticultural Research (Japan) 12(2), 187-194, 2013

    THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE

Codes

  • NII Article ID (NAID)
    130004476146
  • NII NACSIS-CAT ID (NCID)
    AA11608561
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1347-2658
  • NDL Article ID
    024709949
  • NDL Call No.
    Z74-C757
  • Data Source
    NDL  IR  J-STAGE 
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