Light quality in and between tomato plant rows in a greenhouse

K. Kurata, R. Matsuda, Chieri Kubota, A. Ikeguchi, N. Sabeh, Gene A Giacomelli, S. Sase, M. Ishii, S. Yokoi

Research output: Contribution to journalArticle

Abstract

Recently in some large scale greenhouses, young tomato seedlings have been planted between mature crop rows to enable year-round production. Young seedlings receive light intercepted and transmitted/reflected by leaves of mature crops. Light quality (spectrum) changes by these procedures and affects the seedling growth. In particular, red/far red ratio is of main concern, because this ratio affects the stem extension rate via the change in the phytochrome photostationary state (Pfr/Ptotal)-However, there have been no reports on the light quality in and between tomato crop rows. Measurements of light quality in and between mature tomato crop rows were conducted in a semi-arid greenhouse in Tucson, Arizona on a clear day and profiles of R/FR ratio and Pfr/Ptotal were calculated. When the direct solar radiation penetrated into the canopy in parallel to the row, photon flux density (PFD) in FR at the height of 2.20 m in the passage between the rows was larger than that at the canopy height (3.10 m). Gradual decrease of R/FR with the depth into the canopy was observed in the passage, but in the rows, R/FR took the minimum value at the middle of the height. In the passage, Pfr/Ptotal was almost constant with regard to the height when the direct solar radiation ran parallel to the row, but at other periods slightly decreased with the depth into the canopy from 0.7 at the canopy height to 0.6 at the ground. In the rows, Pfr/Ptotal took the minimum at the middle of the height.

Original languageEnglish (US)
Pages (from-to)227-234
Number of pages8
JournalActa Horticulturae
Volume761
StatePublished - 2007

Fingerprint

light quality
tomatoes
greenhouses
canopy
crops
solar radiation
seedlings
phytochrome
seedling growth
stems
leaves

Keywords

  • P/P
  • Phytochrome photostationary state
  • Red far-red ratio
  • Spectrum
  • Stem extension rate

ASJC Scopus subject areas

  • Horticulture

Cite this

Kurata, K., Matsuda, R., Kubota, C., Ikeguchi, A., Sabeh, N., Giacomelli, G. A., ... Yokoi, S. (2007). Light quality in and between tomato plant rows in a greenhouse. Acta Horticulturae, 761, 227-234.

Light quality in and between tomato plant rows in a greenhouse. / Kurata, K.; Matsuda, R.; Kubota, Chieri; Ikeguchi, A.; Sabeh, N.; Giacomelli, Gene A; Sase, S.; Ishii, M.; Yokoi, S.

In: Acta Horticulturae, Vol. 761, 2007, p. 227-234.

Research output: Contribution to journalArticle

Kurata, K, Matsuda, R, Kubota, C, Ikeguchi, A, Sabeh, N, Giacomelli, GA, Sase, S, Ishii, M & Yokoi, S 2007, 'Light quality in and between tomato plant rows in a greenhouse', Acta Horticulturae, vol. 761, pp. 227-234.
Kurata, K. ; Matsuda, R. ; Kubota, Chieri ; Ikeguchi, A. ; Sabeh, N. ; Giacomelli, Gene A ; Sase, S. ; Ishii, M. ; Yokoi, S. / Light quality in and between tomato plant rows in a greenhouse. In: Acta Horticulturae. 2007 ; Vol. 761. pp. 227-234.
@article{6141a4f874c947fdaff2881d8a26b9ab,
title = "Light quality in and between tomato plant rows in a greenhouse",
abstract = "Recently in some large scale greenhouses, young tomato seedlings have been planted between mature crop rows to enable year-round production. Young seedlings receive light intercepted and transmitted/reflected by leaves of mature crops. Light quality (spectrum) changes by these procedures and affects the seedling growth. In particular, red/far red ratio is of main concern, because this ratio affects the stem extension rate via the change in the phytochrome photostationary state (Pfr/Ptotal)-However, there have been no reports on the light quality in and between tomato crop rows. Measurements of light quality in and between mature tomato crop rows were conducted in a semi-arid greenhouse in Tucson, Arizona on a clear day and profiles of R/FR ratio and Pfr/Ptotal were calculated. When the direct solar radiation penetrated into the canopy in parallel to the row, photon flux density (PFD) in FR at the height of 2.20 m in the passage between the rows was larger than that at the canopy height (3.10 m). Gradual decrease of R/FR with the depth into the canopy was observed in the passage, but in the rows, R/FR took the minimum value at the middle of the height. In the passage, Pfr/Ptotal was almost constant with regard to the height when the direct solar radiation ran parallel to the row, but at other periods slightly decreased with the depth into the canopy from 0.7 at the canopy height to 0.6 at the ground. In the rows, Pfr/Ptotal took the minimum at the middle of the height.",
keywords = "P/P, Phytochrome photostationary state, Red far-red ratio, Spectrum, Stem extension rate",
author = "K. Kurata and R. Matsuda and Chieri Kubota and A. Ikeguchi and N. Sabeh and Giacomelli, {Gene A} and S. Sase and M. Ishii and S. Yokoi",
year = "2007",
language = "English (US)",
volume = "761",
pages = "227--234",
journal = "Acta Horticulturae",
issn = "0567-7572",
publisher = "International Society for Horticultural Science",

}

TY - JOUR

T1 - Light quality in and between tomato plant rows in a greenhouse

AU - Kurata, K.

AU - Matsuda, R.

AU - Kubota, Chieri

AU - Ikeguchi, A.

AU - Sabeh, N.

AU - Giacomelli, Gene A

AU - Sase, S.

AU - Ishii, M.

AU - Yokoi, S.

PY - 2007

Y1 - 2007

N2 - Recently in some large scale greenhouses, young tomato seedlings have been planted between mature crop rows to enable year-round production. Young seedlings receive light intercepted and transmitted/reflected by leaves of mature crops. Light quality (spectrum) changes by these procedures and affects the seedling growth. In particular, red/far red ratio is of main concern, because this ratio affects the stem extension rate via the change in the phytochrome photostationary state (Pfr/Ptotal)-However, there have been no reports on the light quality in and between tomato crop rows. Measurements of light quality in and between mature tomato crop rows were conducted in a semi-arid greenhouse in Tucson, Arizona on a clear day and profiles of R/FR ratio and Pfr/Ptotal were calculated. When the direct solar radiation penetrated into the canopy in parallel to the row, photon flux density (PFD) in FR at the height of 2.20 m in the passage between the rows was larger than that at the canopy height (3.10 m). Gradual decrease of R/FR with the depth into the canopy was observed in the passage, but in the rows, R/FR took the minimum value at the middle of the height. In the passage, Pfr/Ptotal was almost constant with regard to the height when the direct solar radiation ran parallel to the row, but at other periods slightly decreased with the depth into the canopy from 0.7 at the canopy height to 0.6 at the ground. In the rows, Pfr/Ptotal took the minimum at the middle of the height.

AB - Recently in some large scale greenhouses, young tomato seedlings have been planted between mature crop rows to enable year-round production. Young seedlings receive light intercepted and transmitted/reflected by leaves of mature crops. Light quality (spectrum) changes by these procedures and affects the seedling growth. In particular, red/far red ratio is of main concern, because this ratio affects the stem extension rate via the change in the phytochrome photostationary state (Pfr/Ptotal)-However, there have been no reports on the light quality in and between tomato crop rows. Measurements of light quality in and between mature tomato crop rows were conducted in a semi-arid greenhouse in Tucson, Arizona on a clear day and profiles of R/FR ratio and Pfr/Ptotal were calculated. When the direct solar radiation penetrated into the canopy in parallel to the row, photon flux density (PFD) in FR at the height of 2.20 m in the passage between the rows was larger than that at the canopy height (3.10 m). Gradual decrease of R/FR with the depth into the canopy was observed in the passage, but in the rows, R/FR took the minimum value at the middle of the height. In the passage, Pfr/Ptotal was almost constant with regard to the height when the direct solar radiation ran parallel to the row, but at other periods slightly decreased with the depth into the canopy from 0.7 at the canopy height to 0.6 at the ground. In the rows, Pfr/Ptotal took the minimum at the middle of the height.

KW - P/P

KW - Phytochrome photostationary state

KW - Red far-red ratio

KW - Spectrum

KW - Stem extension rate

UR - http://www.scopus.com/inward/record.url?scp=61449223829&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=61449223829&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:61449223829

VL - 761

SP - 227

EP - 234

JO - Acta Horticulturae

JF - Acta Horticulturae

SN - 0567-7572

ER -