Abstract
High solar radiation in summer season causes excessive respiration of crops and reduces photosynthesis. In addition, the rainy season, which mainly occurs in summer, causes a low light condition inside the greenhouse. A low light condition can reduce crop growth and yield. This study was conducted to evaluate the effect of shade and supplemental lighting on the growth and yield of cucumber during summer season. Cucumber grafted seedlings were transplanted in two plastic greenhouses on August 30, 2022. To reduce the light intensity inside the greenhouse, a 50% shading screen was installed in one greenhouse. Supplemental lighting was conducted from September 7, 2022 to October 20, 2022. HPS (high-pressure sodium lamp), W LED (white LED, red:green:blue = 5:3:2), and RB LED (combined red and blue LED, red:blue = 7:3) were used for supplemental lighting sources, and non-treated (non-supplemental lighting) was as the control. The supplemental lighting was conducted before sunrise and after sunset for 2 hours with a photosynthetic photon flux density of 150 ± 20 µmol·m-2·s-1. The plant height, leaf length, leaf width, and SPAD value tended to increase in the shading group. RB LED increased stem diameter regardless of shading treatment. Fresh and dry weights of fruits were not significantly different in shading and supplemental lighting. Average fresh weight of fruits was not significantly different among supplemental lighting as the harvest date passed. In conclusion, in this study 50% shade treatment significantly improved the growth of cucumber during the summer season. In addition, the growth and fruit characteristics are better than the control without supplemental lighting. This study can be used as basic research data for applying supplemental lighting technology to cucumber cultivation.
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Claims 7
Claim · model-written summary
Shading tended to increase cucumber height, leaf dimensions and SPAD value.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- shading groupe0
- Outcome
- plant height, leaf length, leaf width, and SPAD valuee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“The plant height, leaf length, leaf width, and SPAD value tended to increase in the shading group.”
Claim · model-written summary
RB LED increased cucumber stem diameter irrespective of shading.
- Taxon
- CucumberCucumis sativust0
- Treatment
- RB LEDe0
- Outcome
- stem diametere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“RB LED increased stem diameter regardless of shading treatment.”
Claim · model-written summary
Fruit fresh weight did not differ significantly across shading and supplemental lighting treatments.
- Taxon
- CucumberCucumis sativust0
- Treatment
- shading and supplemental lightinge0
- Outcome
- Fresh and dry weights of fruitse0
- Direction
- not significantly differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“Fresh and dry weights of fruits were not significantly different in shading and supplemental lighting.”
Claim · model-written summary
Fruit dry weight did not differ significantly across shading and supplemental lighting treatments.
- Taxon
- CucumberCucumis sativust0
- Treatment
- shading and supplemental lightinge0
- Outcome
- dry weights of fruitse0
- Direction
- not significantly differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“Fresh and dry weights of fruits were not significantly different in shading and supplemental lighting.”
Claim · model-written summary
Average fruit fresh weight did not differ significantly among supplemental lighting treatments over harvest dates.
- Taxon
- CucumberCucumis sativust0
- Treatment
- supplemental lightinge0
- Outcome
- Average fresh weight of fruitse0
- Direction
- not significantly differente0
- Qualifier
- as the harvest date passede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“Average fresh weight of fruits was not significantly different among supplemental lighting as the harvest date passed.”
Claim · model-written summary
The authors concluded that 50% shading significantly improved cucumber growth in summer.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- 50% shade treatmente0
- Outcome
- growth of cucumbere0
- Direction
- improvede0
- Setting
- summer seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“50% shade treatment significantly improved the growth of cucumber during the summer season.”
Claim · model-written summary
The authors concluded that supplemental lighting improved growth and fruit characteristics compared with no supplemental lighting.
- Taxon
- CucumberCucumis sativust0
- Treatment
- supplemental lightinge0
- Outcome
- growth and fruit characteristicse0
- Direction
- bettere0
- Comparator
- control without supplemental lightinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber”
e0“the growth and fruit characteristics are better than the control without supplemental lighting.”
The same questions in other papers
light · growth · Cucumis sativus (cucumber)Results differ
52 papers in the same direction as this paper · 29 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
79 papers more in this group
See all 83 papers →shade · growth · Cucumis sativus (cucumber)Positive and negative results
3 in the opposite direction
- negative
- negative
- negative
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.