Abstract
Growing global warming and a projected rise in the world's population have made it imperative to produce food and agricultural products with a limited supply of water and energy sources. Conversely, there is a need to employ modern technologies, such as LED artificial lights, to ensure that plants receive adequate light energy. Therefore, this research was aimed at increasing the efficiency of supplementary LED lights, with three lettuce cultivars namely Red Sail, Edox and Summer Bibb, for four light spectrums (white, a combination of red and blue, monochromatic red and monochromatic blue) and three replacement methods of the nutrient solution for the aeroponic system such as complete replacement of the nutrient solution, based on electrical conductivity (EC) and based on plant needs. The results depicted that white light significantly affected the fresh shoot and root weight in Red Sails variety under the complete replacement method of the nutrient solution. Similarly, the highest photosynthetic pigments concentrations were observed under the combination of red and blue and for monochromatic red light. Moreover, the significant Pn, E, gs, Ci and spad were observed under white light and in all three replacement methods of nutrient solutions whereas the most positive effect was recorded in the replacement method based on plant needs. Therefore, the simultaneous use of supplemental lights and replacement methods of nutrient solution, particularly replacement based on the plant needs increases the production of agricultural products like lettuce in addition to lowering the consumption of electricity, water, and nutrients for agricultural production.
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Claims 8
Claim · model-written summary
White light significantly affected fresh shoot and root weight in Red Sails under complete nutrient solution replacement.
- Taxon
- lettuce
Lactuca sativat0 - Material
- Red Sailse0
- Treatment
- white lighte0
- Outcome
- fresh shoot and root weighte0
- Qualifier
- complete replacement method of the nutrient solutione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“white light significantly affected the fresh shoot and root weight in Red Sails variety under the complete replacement method of the nutrient solution”
t0“lettuce”
Claim · model-written summary
Red and blue light gave the highest photosynthetic pigment concentrations.
- Taxon
- lettuceLactuca sativat0
- Treatment
- combination of red and bluee0
- Outcome
- photosynthetic pigments concentrationse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest photosynthetic pigments concentrations were observed under the combination of red and blue”
t0“lettuce”
Claim · model-written summary
Monochromatic red light gave the highest photosynthetic pigment concentrations.
- Taxon
- lettuceLactuca sativat0
- Treatment
- monochromatic red lighte0
- Outcome
- photosynthetic pigments concentrationse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest photosynthetic pigments concentrations were observed under the combination of red and blue and for monochromatic red light”
t0“lettuce”
Claim · model-written summary
White light significantly affected Pn, E and gs across all three nutrient solution replacement methods.
- Taxon
- lettuceLactuca sativat0
- Treatment
- white lighte0
- Outcome
- Pn, E, gse0
- Qualifier
- all three replacement methods of nutrient solutionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant Pn, E, gs, Ci and spad were observed under white light and in all three replacement methods of nutrient solutions”
t0“lettuce”
Claim · model-written summary
White light significantly affected Ci and spad across all three replacement methods.
- Taxon
- lettuceLactuca sativat0
- Treatment
- white lighte0
- Outcome
- Ci and spade0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant Pn, E, gs, Ci and spad were observed under white light and in all three replacement methods of nutrient solutions”
t0“lettuce”
Claim · model-written summary
Replacement based on plant needs had the most positive effect.
- Taxon
- lettuceLactuca sativat0
- Treatment
- replacement method based on plant needse0
- Outcome
- most positive effecte0
- Direction
- most positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most positive effect was recorded in the replacement method based on plant needs”
t0“lettuce”
Claim · model-written summary
Simultaneous supplemental light and needs-based solution replacement increased lettuce production.
- Taxon
- lettuceLactuca sativae0
- Treatment
- simultaneous use of supplemental lights and replacement methods of nutrient solutione0
- Outcome
- production of agricultural productse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“simultaneous use of supplemental lights and replacement methods of nutrient solution, particularly replacement based on the plant needs increases the production of agricultural products like lettuce”
Claim · model-written summary
The simultaneous approach lowered electricity, water and nutrient consumption.
- Taxon
- lettuceLactuca sativae0
- Treatment
- replacement based on the plant needse0
- Outcome
- consumption of electricity, water, and nutrientse0
- Direction
- loweringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“replacement based on the plant needs increases the production of agricultural products like lettuce in addition to lowering the consumption of electricity, water, and nutrients for agricultural production”
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See all 249 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.