トマト育苗のためのLED光照射条件の検討  [in Japanese] Examination of Irradiation Conditions Using LED Light for the Growth of Tomato Seedlings  [in Japanese]

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Abstract

トマト苗の生育検討を目的として,各種波長の単色LED照明を用い,LED光の組み合わせ,光量および照射パターンを変えてトマト育苗を行い,蛍光灯を用いた場合との比較から育苗に適したLED光照射条件の検討を行った。合わせて,苗乾燥重当たりの消費電力量を算出し,各種LED光照射条件における生産効率を評価した。実験には'桃太郎ヨーク'および'りんか409'の2品種のトマトを使用した。育苗は苗テラスを用いて行った。苗テラスの蛍光灯に変えて赤,青,緑,遠赤色の4色のLED照明を用いて各種照射条件にて育苗を行い,蛍光灯の場合と比較した。その結果,日積算光合成有効光量子量当たりの苗乾燥重の比較で,'桃太郎ヨーク'では赤色光,青色光に加えて遠赤色光を照射した試験区および赤色光と青色光の交互照射区で蛍光灯区と同等以上の値となった。赤色光と青色光の交互照射区では乾燥重当たりの照明の消費電力量が蛍光灯区の62%~79%となり,電力コストの削減に寄与できる可能性が示唆された。'りんか409'でもほぼ同様の結果となったが,一部照射条件で'桃太郎ヨーク'と異なる結果となり,品種による違いが認められた。

To study the growth of tomato seedlings, we used LED light at different wavelengths under various irradiation conditions such as different combinations of LED light, light intensity, and lighting time schedule. For the experiments, we used the 'Momotaro-York' and 'Rinka 409' cultivars of tomato. We examined LED irradiation conditions suitable for the growth of tomato seedlings, and compared the growth results to those obtained using fluorescent light. In addition, we calculated and evaluated the electricity consumption and efficacy of LED light per dry weight of tomato seedlings produced. To culture the seedlings, we used the "Nae terrace" system, and we changed the light source from fluorescent light to red, blue, green, and far-red LED light. A comparison of the dry weight of the seedlings per daily light integral under each light condition for 'Momotaro-York' suggested that irradiating tomatoes with far-red light in addition to red and blue light, or irradiating with blue and red light alternately, yields similar or better results as compared to those obtained using fluorescent light. Moreover, the electricity consumption when using alternating blue and red light irradiation was 62-79% of that when fluorescent light was used. This suggests that alternating blue and red light irradiation could contribute to electrical cost saving in tomato seedling production. We obtained similar results for 'Rinka 409' ; however, we obtained different results for 'Momotaro-York' under some irradiation conditions, which could be attributed to the varietal differences between the two tomato cultivars.

Journal

  • 野菜茶業研究所研究報告 = Bulletin of the National Institute of Vegetable and Tea Science

    野菜茶業研究所研究報告 = Bulletin of the National Institute of Vegetable and Tea Science (15), 57-66, 2016-03

    農業技術研究機構野菜茶業研究所

Codes

  • NII Article ID (NAID)
    120006586962
  • NII NACSIS-CAT ID (NCID)
    AA11648748
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    1346-6984
  • NDL Article ID
    027235281
  • NDL Call No.
    Z74-C904
  • Data Source
    NDL  IR  JASI 
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