Growth of lettuce plants (Lactuca sativa L.) under variable-value control of air temperature by using natural light intensity as feedback signal

H. Eguchi, Satoshi Yoshida, K. Toh, M. Hamakoga, Kitano Masaharu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Lettuce plants (Lactuca sativa L.) were grown under different regimes of variable-value control of air temperature, where the set values of air temperature increased quadratically with the natural light intensity in the different dynamic ranges. Under the regime of lower night temperature and larger dynamic range of air temperature, succulent growth was prevented, and leaf fresh and dry weights per unit leaf area became larger because of leaf thickening with well developed spongy layer. The results suggest that the variable value control of air temperature by using the natural light intensity as a feedback signal can improve plant growth under controlled environment.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalBIOTRONICS
Volume26
Publication statusPublished - Dec 1 1997

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Lettuce
Lactuca sativa
light intensity
lettuce
air temperature
solar radiation
Air
Light
Temperature
Growth
night temperature
Controlled Environment
leaf area
leaves
plant growth
Weights and Measures

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)
  • Plant Science

Cite this

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abstract = "Lettuce plants (Lactuca sativa L.) were grown under different regimes of variable-value control of air temperature, where the set values of air temperature increased quadratically with the natural light intensity in the different dynamic ranges. Under the regime of lower night temperature and larger dynamic range of air temperature, succulent growth was prevented, and leaf fresh and dry weights per unit leaf area became larger because of leaf thickening with well developed spongy layer. The results suggest that the variable value control of air temperature by using the natural light intensity as a feedback signal can improve plant growth under controlled environment.",
author = "H. Eguchi and Satoshi Yoshida and K. Toh and M. Hamakoga and Kitano Masaharu",
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T1 - Growth of lettuce plants (Lactuca sativa L.) under variable-value control of air temperature by using natural light intensity as feedback signal

AU - Eguchi, H.

AU - Yoshida, Satoshi

AU - Toh, K.

AU - Hamakoga, M.

AU - Masaharu, Kitano

PY - 1997/12/1

Y1 - 1997/12/1

N2 - Lettuce plants (Lactuca sativa L.) were grown under different regimes of variable-value control of air temperature, where the set values of air temperature increased quadratically with the natural light intensity in the different dynamic ranges. Under the regime of lower night temperature and larger dynamic range of air temperature, succulent growth was prevented, and leaf fresh and dry weights per unit leaf area became larger because of leaf thickening with well developed spongy layer. The results suggest that the variable value control of air temperature by using the natural light intensity as a feedback signal can improve plant growth under controlled environment.

AB - Lettuce plants (Lactuca sativa L.) were grown under different regimes of variable-value control of air temperature, where the set values of air temperature increased quadratically with the natural light intensity in the different dynamic ranges. Under the regime of lower night temperature and larger dynamic range of air temperature, succulent growth was prevented, and leaf fresh and dry weights per unit leaf area became larger because of leaf thickening with well developed spongy layer. The results suggest that the variable value control of air temperature by using the natural light intensity as a feedback signal can improve plant growth under controlled environment.

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