Abstract
For stable year-round seedling production of Solanum lycopersicum, this study was conducted to select the appropriate light source and light intensity in a vertical farm.The seedlings were cultivated with a 14-hour light period at an air temperature of 25/20.The effects of four light-emitting diodes (LEDs)-cool white LED and warm white LED, both with and without far-red LED light-were tested at a photosynthetic photon flux density of 350 molm -2 s -1 .Growth characteristics, such as plant height and fresh weight, showed no significant differences between the cool white LED and the warm white LED.However, the addition of far-red light significantly increased plant height, internode length, stem diameter, leaf area, and fresh weight while decreasing SPAD values.Seedling qualities such as compactness improved with cool white LED without far-red light.In a second experiment, the red/far-red ratio was adjusted between 1.4 and 15.2 using cool white LED.As the ratio of far-red light increased, overall growth improved, but compactness was higher at red/far-red ratios of 2.5 and 3.6.Under various light intensities at a red/far-red ratio of 2.5, a light intensity of 300 molm -2 s -1 or higher showed higher compactness.Therefore, for tomato seedling production in a vertical farm using artificial light, cool white LED with far-red light at an R/FR ratio of 2.5 to 3.6 and a light intensity of 300 molm -2 s -1 was found to be effective.
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Claims 8
Claim · model-written summary
Cool and warm white LEDs did not significantly differ in seedling height and fresh weight.
- Taxon
- Solanum lycopersicum
Solanum lycopersicumt0 - Treatment
- cool white LEDe0
- Outcome
- plant height and fresh weighte0
- Direction
- no significant differencese0
- Comparator
- warm white LEDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth characteristics, such as plant height and fresh weight, showed no significant differences between the cool white LED and the warm white LED.”
t0“Solanum lycopersicum”
Claim · model-written summary
Far-red light increased height, internode length, stem diameter, leaf area and fresh weight.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- addition of far-red lighte0
- Outcome
- plant height, internode length, stem diameter, leaf area, and fresh weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of far-red light significantly increased plant height, internode length, stem diameter, leaf area, and fresh weight while decreasing SPAD values”
t0“Tomato Seedlings”
Claim · model-written summary
Far-red light decreased SPAD values.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- addition of far-red lighte0
- Outcome
- SPAD valuese0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of far-red light significantly increased plant height, internode length, stem diameter, leaf area, and fresh weight while decreasing SPAD values”
t0“Tomato Seedlings”
Claim · model-written summary
Cool white LED without far-red light improved seedling compactness.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- cool white LED without far-red lighte0
- Outcome
- compactnesse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling qualities such as compactness improved with cool white LED without far-red light.”
t0“Tomato Seedlings”
Claim · model-written summary
Greater far-red ratio improved overall growth.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ratio of far-red lighte0
- Outcome
- overall growthe0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the ratio of far-red light increased, overall growth improved”
t0“Tomato Seedlings”
Claim · model-written summary
Compactness was higher at red/far-red ratios of 2.5 and 3.6.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- compactnesse0
- Direction
- highere0
- Value
- 2.5 and 3.6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compactness was higher at red/far-red ratios of 2.5 and 3.6”
t0“Tomato Seedlings”
Claim · model-written summary
Light intensity of 300 molm -2 s -1 or higher gave higher compactness.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- light intensity of 300 molm -2 s -1 or highere0
- Outcome
- compactnesse0
- Direction
- highere0
- Value
- 300 molm -2 s -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a light intensity of 300 molm -2 s -1 or higher showed higher compactness”
t0“Tomato Seedlings”
Claim · model-written summary
The authors found cool white LED plus far-red light at a ratio of 2.5 to 3.6 and intensity of 300 molm -2 s -1 effective for tomato seedling production.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- cool white LED with far-red light at an R/FR ratio of 2.5 to 3.6 and a light intensity of 300 molm -2 s -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cool white LED with far-red light at an R/FR ratio of 2.5 to 3.6 and a light intensity of 300 molm -2 s -1 was found to be effective”
t0“tomato seedling production”
The same questions in other papers
light · growth · Solanum lycopersicum (tomato)Positive and negative results
154 papers in the same direction as this paper · 66 in the opposite direction · 5 reporting no difference from an alternative
- positive
- negative
- negative
222 papers more in this group
See all 226 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.