Influence of Cultivation Environment on Growth of Lettuce Seedlings in Artificial Light Type Plant Factory

Atsumasa Yoshida, Hironori Oka, Shinichi Kinoshita*, Ayumi Enjoji, Junichi Yamaguchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


It is necessary to optimize and homogenize the environmental conditions in plant factories. We installed sensors to observe the environmental factors in a plant factory and evaluated lettuce growth. We found that the integrated quantity of PPFD (Photosynthetic Photon Flux Density) is correlated with fresh weight of harvested leaf lettuces and that lettuce density also affects growth. There is the relationship between adjacent and central plant stocks. The influence of planting density was observed, and thinning improved the growing conditions at many planting positions. On the other hand, it was concluded that the air temperature and humidity were uniform in the plant cultivation bed and did not affect the growing condition. It was observed that the air temperature, humidity and wind speed were affected when the cultivation bed was in front of the air conditioning port. The CO2 concentration was controlled within a range that did not affect the growth.

Original languageEnglish
Pages (from-to)785-792
Number of pages8
JournalJournal of Applied Science and Engineering (Taiwan)
Issue number5
Publication statusPublished - 2022
Externally publishedYes


  • Cultivation density
  • Environmental conditions
  • Growth diagnosis
  • Large-scale plant factory
  • Light intensity

ASJC Scopus subject areas

  • General
  • General Engineering


Dive into the research topics of 'Influence of Cultivation Environment on Growth of Lettuce Seedlings in Artificial Light Type Plant Factory'. Together they form a unique fingerprint.

Cite this