Effects of Supplemental Lighting within the Canopy at Different Developing Stages on Tomato Yield and Quality of Single-Truss Tomato Plants Grown at High Density

DOI Web Site 8 Citations 66 References
  • LU Na
    Graduate School of Horticulture, Chiba University
  • MARUO Toru
    Graduate School of Horticulture, Chiba University
  • JOHKAN Masahumi
    Graduate School of Horticulture, Chiba University
  • HOHJO Masaaki
    Center for Environment, Health and Field Sciences, Chiba University
  • TSUKAGOSHI Satoru
    Center for Environment, Health and Field Sciences, Chiba University
  • ITO Yoshikazu
    Center for Environment, Health and Field Sciences, Chiba University
  • ICHIMURA Takuya
    Development Group of Industrial Film Development Center, Mitsubishi Plastics, Inc., Nagoya
  • SHINOHARA Yutaka
    Graduate School of Horticulture, Chiba University

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Abstract

The single truss tomato production system (STTPS) was used to grow tomato plants at a density of 14.3 plants·m−2 for increasing the tomato yield in Japan. We applied supplemental lighting within the canopy at different tomato development stages to identify the most sensitive stage at which supplemental lighting will most effectively increase yield and quality of tomato fruits. Fluorescent lamps were used to supply intra-canopy lighting to tomato plants (5:00–21:00) during the stages of anthesis (stage 1), rapid fruit development (stage 2), fruit ripening (stage 3), and from initial anthesis to red-ripe fruit (whole stage), respectively. Supplemental lighting applied to tomato plants during stage 2 and whole stage significantly increased the yield and sugar content of tomato fruits. Moreover, the contribution of supplemental lighting to the daily increase of tomato yield was highest at stage 2. The increase of fruit fresh weight and amount of supplemental lighting showed positive linear relationship. Supplemental lighting did not affect the ascorbic acid content of tomato fruits, fruit number per plant, and plant shoot weight among all the treatments. Thus, based on economic advantage, the use of supplemental lighting during the rapid fruit development stage of tomato plants under STTPS was most efficient.

Journal

  • Environment Control in Biology

    Environment Control in Biology 50 (1), 1-11, 2012

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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