›› 2019, Vol. 31 ›› Issue (5): 737-745.DOI: 10.3969/j.issn.1004-1524.2019.05.09

• Horticultural Science • Previous Articles     Next Articles

Effects of different red and blue LED light intensity and irrigation and their interactions on growth of tomato seedlings

YANG Yana1, FAN Xiaoxue2, XU Gang2, ZHANG Yu1, LI Yaling1,*, WEN Xiangzhen1   

  1. 1. College of Horticulture, Shanxi Agricultural University, Taigu 030801, China;
    2. Institute of Vegetables, Jiangsu Academy of Agriculture Sciences, Nanjing 210014, China
  • Received:2018-11-09 Online:2019-05-25 Published:2019-05-23

Abstract: In this study, the growth and photosynthesis of tomato seedlings under different light intensity and irrigation were investigated by using red and blue light as the basic light source. The results showed that different light intensity and irrigation had significant effects on the growth of tomato seedlings. Plant height was decreased,stem diameter became smaller, internode was shortened, leaf area was decreased, fresh weight of the plant and dry weight of the shoot was decreased, and photosynthesis of tomato seedlings was decreased with the reduction of irrigation. The main factors affecting chlorophyll content were light conditions, and water was a secondary influence factor. When the light intensity exceeded 3 540 lx, the increase of light intensity had no significant effect on biomass of the plant. The maximal photochemical efficiency Fv/Fm of all treatment combinations in the experiment were stable at around 0.8, indicating that plant growth was in a healthy state. Among all the treatment, tomato plants with 3 540 lx light density and 150 mL·plant-1 irrigation (L2W1) presented the most strong growth vigor.

Key words: tomato seedlings, red and blue light, light intensity, irrigation, photosynthetic characteristics

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