Abstract
Air temperature and light conditions are important factors not only to produce high-quality seedlings but also to promote energy efficiency in a plant factory with artificial lighting. In this study, we conducted two experiments in order to investigate the favorable conditions of air temperature, light intensity and photoperiod for the production of cucumber scions and rootstocks in a plant factory with artificial lighting. Cucumber scions and rootstocks were cultivated in two combined treatments: the combination of three different levels of difference between the day and night temperature (DIF), 25/20, 26/18 and 27/16 °C and five different light intensity conditions of photosynthetic photon flux, 50, 100, 150, 200 and 250 μmol·m−2·s−1 was set for the first experiment, and the combination of three different photoperiod conditions, 12, 16 and 20 h·d−1 and five different light intensity conditions, 50, 100, 150, 200 and 250 μmol·m−2·s−1 was set for the second experiment. In the air temperature and light intensity treatments, the hypocotyl elongation of cucumber scions and rootstocks was affected more largely by light intensity than DIF. The highest DIF treatment (27/16 °C) affected negatively on the accumulation of dry mass. On the contrary, the smallest DIF treatment (25/20 °C) was favorable for seedling growth due to lesser stress by rapid change of air temperature between photo- and dark-period. In the photoperiod and light intensity treatments, an increased DLI (daily light integral) promoted the growth of scions and rootstocks. Under the same DLI condition, the growth of scions and rootstocks increased with increasing photoperiod and decreasing light intensity. In both of experiments, while the dry weight increased with increasing the light intensity, the light use efficiencies were reduced by increasing the light intensity. Considering the growth and quality of seedlings and energy efficiency, the optimal environment conditions were represented by 25/20 °C of air temperature, 150 μmol·m−2·s−1 of light intensity and 16 h·d−1 of photoperiod.
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Claims 8
Claim · model-written summary
Hypocotyl elongation of cucumber scions and rootstocks was affected more by light intensity than by DIF.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- light intensitye1
- Outcome
- hypocotyl elongatione1
- Comparator
- DIFe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e1“the hypocotyl elongation of cucumber scions and rootstocks was affected more largely by light intensity than DIF”
Claim · model-written summary
The highest DIF treatment (27/16 °C) affected dry mass accumulation of cucumber seedlings negatively.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- highest DIF treatment (27/16 °C)e2
- Outcome
- accumulation of dry masse2
- Direction
- affected negativelye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e2“The highest DIF treatment (27/16 °C) affected negatively on the accumulation of dry mass”
Claim · model-written summary
The smallest DIF treatment (25/20 °C) favoured seedling growth of cucumber, attributed to less stress from rapid air temperature change between photo- and dark-period.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- smallest DIF treatment (25/20 °C)e3
- Outcome
- seedling growthe3
- Direction
- higherinferrede3
- Qualifier
- due to lesser stress by rapid change of air temperature between photo- and dark-periode3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e3“the smallest DIF treatment (25/20 °C) was favorable for seedling growth due to lesser stress by rapid change of air temperature between photo- and dark-period”
Claim · model-written summary
An increased DLI promoted the growth of cucumber scions and rootstocks.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- increased DLI (daily light integral)e4
- Outcome
- growth of scions and rootstockse4
- Direction
- promotede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e4“In the photoperiod and light intensity treatments, an increased DLI (daily light integral) promoted the growth of scions and rootstocks”
Claim · model-written summary
Under the same DLI, growth of cucumber scions and rootstocks increased with increasing photoperiod and decreasing light intensity.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- increasing photoperiod and decreasing light intensitye5
- Outcome
- growth of scions and rootstockse5
- Direction
- increasede5
- Qualifier
- Under the same DLI conditione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e5“Under the same DLI condition, the growth of scions and rootstocks increased with increasing photoperiod and decreasing light intensity”
Claim · model-written summary
Dry weight of cucumber increased with increasing light intensity.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- increasing the light intensitye6
- Outcome
- dry weighte6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e6“while the dry weight increased with increasing the light intensity”
Claim · model-written summary
Light use efficiency of cucumber was reduced by increasing light intensity.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- increasing the light intensitye7
- Outcome
- light use efficienciese7
- Direction
- reducede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e7“the light use efficiencies were reduced by increasing the light intensity”
Claim · model-written summary
The optimal environment for cucumber scion and rootstock seedlings was 25/20 °C air temperature, 150 μmol·m−2·s−1 light intensity and 16 h·d−1 photoperiod.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- 25/20 °C of air temperaturee1
- Outcome
- optimal environment conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber scions and rootstocks were cultivated in two combined treatments”
e1“the optimal environment conditions were represented by 25/20 °C of air temperature, 150 μmol·m−2·s−1 of light intensity and 16 h·d−1 of photoperiod”
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
- positive
- negative
- no effect
79 papers more in this group
See all 83 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.