Abstract
Leaf nitrate contents of vegetables and other plants vary. The quantity of light and nitrogen in the environment is one of the most important factors affecting the nitrate metabolism of plant leaves. For this reason, 3 different doses of nitrogen (50, 100 and 150 ppm) were applied to the lettuce plant grown in soilless culture in the greenhouse during the spring period and light-emitting diode (LED) lights (red, purple, blue, and yellow and their combinations) were applied on the plant. Light applications were operated in the automatic system between 8 am and 24 pm. The light intensity on the plant was measured with a light meter at 10 a.m. and 3 p.m. The effects of applications of different LED lights and nitrogen doses on the marketable plant head weight, plant diameter, and chlorophyll ratio of the lettuce plant were found to be statistically significant, but its effect on Brix-Water Soluble Dry Matter (WSDM), pH, and titrable acid ratios were not found statistically significant. Considering the averages, while the head weight was 435 g/piece in the 50 ppm N application, it was 832 g/piece in the 150 ppm N application. Red LED light application, which is one of the lighting applications, provides an increase in efficiency compared to the control. While the leaf nitrate content of lettuce was 1213.2 ppm in the 50 ppm N application, considering the averages, it was measured as 1935.4 ppm in the 150 ppm application. The results show that the preference of dose of N to be applied in the lettuce plant is significant in the relationship between yield and nitrate, and plant growth increases with additional light application.
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Claims 9
Claim · model-written summary
LED and nitrogen applications significantly affected marketable head weight, plant diameter and chlorophyll ratio.
- Taxon
- lettuce plants
Lactuca sativae0 - Treatment
- different LED lights and nitrogen dosese1
- Outcome
- marketable plant head weight, plant diameter, and chlorophyll ratioe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of lettuce plants”
e1“The effects of applications of different LED lights and nitrogen doses on the marketable plant head weight, plant diameter, and chlorophyll ratio of the lettuce plant were found to be statistically significant”
Claim · model-written summary
LED and nitrogen applications did not significantly affect Brix-WSDM, pH and titrable acid ratio.
- Taxon
- lettuce plantsLactuca sativae0
- Treatment
- different LED lights and nitrogen dosese2
- Outcome
- Brix-Water Soluble Dry Matter (WSDM), pH, and titrable acid ratiose1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of lettuce plants”
e1“its effect on Brix-Water Soluble Dry Matter (WSDM), pH, and titrable acid ratios were not found statistically significant”
e2“applications of different LED lights and nitrogen doses”
Claim · model-written summary
Mean head weight was 435 g/piece at 50 ppm N.
- Taxon
- lettuce plantsLactuca sativae0
- Treatment
- 50 ppm N applicatione1
- Outcome
- head weighte1
- Value
- 435 g/piecee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of lettuce plants”
e1“head weight was 435 g/piece in the 50 ppm N application”
Claim · model-written summary
Mean head weight was 832 g/piece at 150 ppm N.
- Taxon
- lettuce plantsLactuca sativae0
- Treatment
- 150 ppm N applicatione1
- Outcome
- head weighte2
- Value
- 832 g/piecee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of lettuce plants”
e1“it was 832 g/piece in the 150 ppm N application”
e2“head weight was 435 g/piece”
Claim · model-written summary
Red LED light increased efficiency versus control.
- Taxon
- lettuce plantsLactuca sativae0
- Treatment
- Red LED light applicatione1
- Outcome
- efficiencye1
- Direction
- increasee1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of lettuce plants”
e1“Red LED light application, which is one of the lighting applications, provides an increase in efficiency compared to the control.”
Claim · model-written summary
Leaf nitrate content was 1213.2 ppm at 50 ppm N.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 50 ppm N applicatione0
- Outcome
- leaf nitrate contente0
- Value
- 1213.2 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf nitrate content of lettuce was 1213.2 ppm in the 50 ppm N application”
Claim · model-written summary
Leaf nitrate content was 1935.4 ppm at 150 ppm N.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 150 ppm applicatione0
- Outcome
- leaf nitrate contente0
- Value
- 1935.4 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf nitrate content of lettuce was 1213.2 ppm in the 50 ppm N application, considering the averages, it was measured as 1935.4 ppm in the 150 ppm application”
Claim · model-written summary
Additional light increased plant growth.
- Taxon
- lettuce plantsLactuca sativae0
- Treatment
- additional light applicatione1
- Outcome
- plant growthe1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of lettuce plants”
e1“plant growth increases with additional light application”
Claim · model-written summary
Nitrogen dose choice is important to the yield-nitrate relationship in lettuce.
- Taxon
- lettuce plantLactuca sativae0
- Outcome
- preference of dose of N to be appliede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“preference of dose of N to be applied in the lettuce plant is significant in the relationship between yield and nitrate”
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See all 300 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.