Abstract
Inter-lighting, applying supplemental light within crop canopy, has been shown to improve plant vertical light distribution and light use efficiency, with high-pressure sodium (HPS) lamps. However, it is not feasible on vegetables cultivated with the popular twin-row system (narrow row) used in major greenhouse vegetable production area in northern regions because of its high bulb temperature. Light-emitting diodes (LEDs) has low operating temperature and thus is potentially a good fit for inter-lighting. In this study, therefore, the effects of LED inter-lighting on sweet pepper growth, fruit yield and quality, and light and energy use efficiency were investigated in the commercial greenhouse. To optimize the production system with LED inter-lighting, different levels of top HPS lighting were also evaluated in the two experiments. Experiment one evaluated single row of LED inter-lighting module per twin-row (56.8 µmol m-2 s-1) without or with top HPS (78 µmol m-2 s-1). Experiment two evaluated the same LED inter-lighting module without or with the top HPS lamps at greater light intensity (155 µmol m-2 s-1). LED inter-lighting improved plant growth, fruit yield and quality compared to the top HPS treatment. Moreover, LED inter-lighting significantly increased fruit dry matter content and the content of health promoting compounds in fruits, including total phenolic content, total carotenoid content and antioxidant activities (ferric reducing antioxidant power assay and 2, 2-diphenyl-1-picrylhydrazyl assay), compared with the HPS treatments. As a result of LED inter-lighting more light reached the crop canopy with a higher efficiency of electricity to light conversion and the plants grown with LED inter-lighting and top HPS achieved higher yield and quality than that with the top HPS only in both experiments.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
LED interlighting improved sweet pepper growth relative to top HPS.
- Taxon
- sweet pepper
Capsicum annuumt0 - Treatment
- LED inter-lightinge0
- Outcome
- plant growthe0
- Direction
- improvede0
- Comparator
- top HPS treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED inter-lighting improved plant growth, fruit yield and quality compared to the top HPS treatment”
t0“sweet pepper”
Claim · model-written summary
LED interlighting improved sweet pepper fruit yield relative to top HPS.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lightinge0
- Outcome
- fruit yielde0
- Direction
- improvede0
- Comparator
- top HPS treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED inter-lighting improved plant growth, fruit yield and quality compared to the top HPS treatment”
t0“sweet pepper”
Claim · model-written summary
LED interlighting improved sweet pepper fruit quality relative to top HPS.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lightinge0
- Outcome
- qualitye0
- Direction
- improvede0
- Comparator
- top HPS treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED inter-lighting improved plant growth, fruit yield and quality compared to the top HPS treatment”
t0“sweet pepper”
Claim · model-written summary
LED interlighting significantly increased fruit dry matter content.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lightinge0
- Outcome
- fruit dry matter contente0
- Direction
- increasede0
- Comparator
- HPS treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED inter-lighting significantly increased fruit dry matter content and the content of health promoting compounds in fruits, including total phenolic content, total carotenoid content and antioxidant activities (ferric reducing antioxidant power assay and 2, 2-diphenyl-1-picrylhydrazyl assay), compared with the HPS treatments”
t0“sweet pepper”
Claim · model-written summary
LED interlighting significantly increased total phenolic and carotenoid contents and antioxidant activities.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lightinge0
- Outcome
- total phenolic content, total carotenoid content and antioxidant activitiese0
- Direction
- increasede0
- Comparator
- HPS treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED inter-lighting significantly increased fruit dry matter content and the content of health promoting compounds in fruits, including total phenolic content, total carotenoid content and antioxidant activities (ferric reducing antioxidant power assay and 2, 2-diphenyl-1-picrylhydrazyl assay), compared with the HPS treatments”
t0“sweet pepper”
Claim · model-written summary
LED interlighting allowed more light to reach the crop canopy.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lightinge0
- Outcome
- light reached the crop canopye0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As a result of LED inter-lighting more light reached the crop canopy”
t0“sweet pepper”
Claim · model-written summary
LED interlighting had higher electricity-to-light conversion efficiency.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- efficiency of electricity to light conversione0
- Direction
- highere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a higher efficiency of electricity to light conversion”
t0“sweet pepper”
Claim · model-written summary
LED interlighting plus top HPS yielded more pepper than top HPS alone in both experiments.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lighting and top HPSe0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- top HPS onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plants grown with LED inter-lighting and top HPS achieved higher yield and quality than that with the top HPS only in both experiments”
t0“sweet pepper”
Claim · model-written summary
LED interlighting plus top HPS improved pepper quality over top HPS alone in both experiments.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- LED inter-lighting and top HPSe0
- Outcome
- qualitye0
- Direction
- highere0
- Comparator
- top HPS onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plants grown with LED inter-lighting and top HPS achieved higher yield and quality than that with the top HPS only in both experiments”
t0“sweet pepper”
The same questions in other papers
sodium atom · yield · Capsicum annuum (sweet pepper)Results agree
2 papers in the same direction as this paper
- positive
- positive
light · yield · Capsicum annuum (sweet pepper)Results differ
14 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- negative
18 papers more in this group
See all 22 papers →light · physiology: pigments · Capsicum annuum (sweet pepper)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
9 papers more in this group
See all 13 papers →light · growth · Capsicum annuum (sweet pepper)Positive and negative results
18 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
19 papers more in this group
See all 23 papers →light · quality: grain · Capsicum annuum (sweet pepper)Results agree
1 paper in the same direction as this paper
- positive
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.