Abstract
The effect of light of various spectral compositions on the complex morphophysiological parameters of lettuce plants in hydroponic was studied. The light sources had the following light spectra: warm white light—2700 K, cold white light—6500 K, and Phyto-LED light, as well as 2700 K + Phyto-LED and 6500 K + Phyto-LED. The dry and fresh biomass, leaf area, stem length, photosynthetic pigment content, photosynthesis and transpiration rates, chlorophyll fluorescence parameters, and percentage of plants that passed into the generative stage of development were studied. The results showed that partial and complete replacement of white LEDs by Phyto-LEDs with lower green light content and greater amounts of far-red light in the radiation spectrum caused an increase in plant productivity of 37%, average leaf area, and transpiration rate in the treatments but also promoted an earlier transition of plants to flowering under light treatment, Phyto-LEDs, and Phyto-LEDs + white LEDs. The 2700 K + Phyto-LED treatment had one of the highest productivities, as did the Phyto-LED and 6500 K + Phyto-LED treatments, but this lighting treatment provoked less flowering on the 60th day of the growing period.
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Claims 7
Claim · model-written summary
Replacing white LEDs partially or completely with Phyto-LEDs increased lettuce productivity by 37%.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- partial and complete replacement of white LEDs by Phyto-LEDse0
- Outcome
- plant productivitye0
- Direction
- increasee0
- Value
- 37%e0
- Comparator
- white LEDse0
- Setting
- hydroponice1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“partial and complete replacement of white LEDs by Phyto-LEDs with lower green light content and greater amounts of far-red light in the radiation spectrum caused an increase in plant productivity of 37%”
e1“lettuce plants in hydroponic”
Claim · model-written summary
Replacing white LEDs with Phyto-LEDs increased average leaf area and transpiration rate.
- Taxon
- lettuceLactuca sativae1
- Treatment
- partial and complete replacement of white LEDs by Phyto-LEDse0
- Outcome
- average leaf area, and transpiration ratee0
- Direction
- increasee0
- Comparator
- white LEDse0
- Setting
- hydroponice1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“partial and complete replacement of white LEDs by Phyto-LEDs with lower green light content and greater amounts of far-red light in the radiation spectrum caused an increase in plant productivity of 37%, average leaf area, and transpiration rate in the treatments”
e1“lettuce plants in hydroponic”
Claim · model-written summary
Phyto-LED and mixed Phyto-LED plus white light promoted earlier flowering.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Phyto-LEDs, and Phyto-LEDs + white LEDse0
- Outcome
- transition of plants to floweringe0
- Direction
- earliere0
- Setting
- hydroponice1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoted an earlier transition of plants to flowering under light treatment, Phyto-LEDs, and Phyto-LEDs + white LEDs”
e1“lettuce plants in hydroponic”
Claim · model-written summary
The 2700 K plus Phyto-LED treatment had one of the highest productivities.
- Taxon
- lettuceLactuca sativae1
- Treatment
- 2700 K + Phyto-LEDe0
- Outcome
- productivitiese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2700 K + Phyto-LED treatment had one of the highest productivities, as did the Phyto-LED and 6500 K + Phyto-LED treatments”
e1“lettuce plants in hydroponic”
Claim · model-written summary
Phyto-LED alone had one of the highest productivities.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Phyto-LEDe0
- Outcome
- productivitiese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2700 K + Phyto-LED treatment had one of the highest productivities, as did the Phyto-LED and 6500 K + Phyto-LED treatments”
e1“lettuce plants in hydroponic”
Claim · model-written summary
The 6500 K plus Phyto-LED treatment had one of the highest productivities.
- Taxon
- lettuceLactuca sativae1
- Treatment
- 6500 K + Phyto-LEDe0
- Outcome
- productivitiese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2700 K + Phyto-LED treatment had one of the highest productivities, as did the Phyto-LED and 6500 K + Phyto-LED treatments”
e1“lettuce plants in hydroponic”
Claim · model-written summary
The 2700 K plus Phyto-LED treatment caused less flowering on day 60.
- Taxon
- lettuceLactuca sativae1
- Treatment
- 2700 K + Phyto-LEDe0
- Outcome
- floweringe0
- Direction
- lesse0
- Qualifier
- 60th day of the growing periode0
- Comparator
- Phyto-LED and 6500 K + Phyto-LED treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2700 K + Phyto-LED treatment had one of the highest productivities, as did the Phyto-LED and 6500 K + Phyto-LED treatments, but this lighting treatment provoked less flowering on the 60th day of the growing period.”
e1“lettuce plants in hydroponic”
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See all 71 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.