Abstract
In Nordic countries during the winter months supplemental lighting is essential for year-round cucumber production. In this research the effects of full HPS (top and interlights) illumination is compared to hybrid (HPS top, LED interlights) and full LED (top and interlights). The results showed that fruit yield was highest in the HPS-LED treatment whereas the electrical use efficiency (kg yield J-1) increased when HPS was replaced with LED. In LED-LED the light use efficiency (g fruit FW mol-1 PAR) was highest but resulted in a fewer number of fruits in mid-winter particularly and the lowest yield potential. The lower temperature and lower light level due to LED-LED lighting lead to reduced photosynthesis capacity, flower initiation rate and water use efficiency whereas increased stem elongation and leaf expansion compared to other treatments. Differences in light quality of LED and HPS are also discussed in terms of cucumber yield formation.
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Claims 7
Claim · model-written summary
Fruit yield was highest under HPS-LED lighting.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- HPS-LEDe0
- Outcome
- fruit yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fruit yield was highest in the HPS-LED treatment”
t0“cucumber”
Claim · model-written summary
Replacing HPS with LED increased electrical use efficiency.
- Taxon
- cucumberCucumis sativust0
- Treatment
- LEDe0
- Outcome
- electrical use efficiencye0
- Direction
- increasede0
- Comparator
- HPSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the electrical use efficiency (kg yield J-1) increased when HPS was replaced with LED.”
t0“cucumber”
Claim · model-written summary
LED-LED had the highest light use efficiency.
- Taxon
- cucumberCucumis sativust0
- Treatment
- LED-LEDe0
- Outcome
- light use efficiencye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In LED-LED the light use efficiency (g fruit FW mol-1 PAR) was highest”
t0“cucumber”
Claim · model-written summary
LED-LED produced fewer fruits, particularly in mid-winter.
- Taxon
- cucumberCucumis sativust0
- Treatment
- LED-LEDe0
- Outcome
- number of fruitse0
- Direction
- fewere0
- Qualifier
- mid-winter particularlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In LED-LED the light use efficiency (g fruit FW mol-1 PAR) was highest but resulted in a fewer number of fruits in mid-winter particularly and the lowest yield potential.”
t0“cucumber”
Claim · model-written summary
LED-LED had the lowest yield potential.
- Taxon
- cucumberCucumis sativust0
- Treatment
- LED-LEDe0
- Outcome
- yield potentiale0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In LED-LED the light use efficiency (g fruit FW mol-1 PAR) was highest but resulted in a fewer number of fruits in mid-winter particularly and the lowest yield potential.”
t0“cucumber”
Claim · model-written summary
Lower temperature and light under LED-LED reduced photosynthesis capacity and water use efficiency.
- Taxon
- cucumberCucumis sativust0
- Treatment
- LED-LED lightinge0
- Outcome
- photosynthesis capacity, flower initiation rate and water use efficiencye0
- Direction
- reducede0
- Qualifier
- lower temperature and lower light levele0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower temperature and lower light level due to LED-LED lighting lead to reduced photosynthesis capacity, flower initiation rate and water use efficiency whereas increased stem elongation and leaf expansion compared to other treatments.”
t0“cucumber”
Claim · model-written summary
LED-LED increased stem elongation and leaf expansion compared with other lighting treatments.
- Taxon
- cucumberCucumis sativust0
- Treatment
- LED-LED lightinge0
- Outcome
- stem elongation and leaf expansione0
- Direction
- increasede0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower temperature and lower light level due to LED-LED lighting lead to reduced photosynthesis capacity, flower initiation rate and water use efficiency whereas increased stem elongation and leaf expansion compared to other treatments.”
t0“cucumber”
The same questions in other papers
light · yield · Cucumis sativus (cucumber)Results differ
13 papers in the same direction as this paper · 17 in the opposite direction
- positive
- no effect
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See all 31 papers →light · physiology: photosynthesis · Cucumis sativus (cucumber)Positive and negative results
30 papers in the same direction as this paper · 30 in the opposite direction
- positive
- positive
- positive
57 papers more in this group
See all 61 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.