Abstract
The objective of this study was to determine the effect of nitrogen fertilization rate on growth and quality of leafy lettuce grown during the winter season in non-circulating hydroponic system. Plants were subjected to seven nitrogen (N) concentrations, i.e. 0, 30, 60, 90, 120, 150 and 180 mg L−1 N using ammonium nitrate. Nitrogen treatments did not have a significant effect on leaf fresh and dry mass, root fresh and dry mass, number leaves and leaf area. Leaf ascorbic acid and total phenolic content, and antioxidant capacity peaked at 100 and 120 mg L−1 N, whereas leaf chlorophyll concentration linearly increased with increasing N application. The results indicate that a solution N concentration of 100 and 120 mg L−1 may be sufficient to improve growth, yield and quality parameters of leafy lettuce grown in non-circulating hydroponic system.
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Claims 6
Claim · model-written summary
Nitrogen treatments did not significantly affect leaf fresh and dry mass of lettuce
- Taxon
- Lettuce (Lactuca sativaL.)
Lactuca sativat0 - Treatment
- Nitrogen treatmentse1
- Outcome
- leaf fresh and dry masse1
- Direction
- did not have a significant effecte1
- Setting
- non-circulating hydroponic systeme2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativaL.) growth, yield and quality response to nitrogen fertilization in a non-circulating hydroponic system”
e1“Nitrogen treatments did not have a significant effect on leaf fresh and dry mass, root fresh and dry mass, number leaves and leaf area”
e2“grown during the winter season in non-circulating hydroponic system”
Claim · model-written summary
Nitrogen treatments did not significantly affect root fresh and dry mass of lettuce
- Taxon
- Lettuce (Lactuca sativaL.)Lactuca sativat0
- Treatment
- Nitrogen treatmentse1
- Outcome
- root fresh and dry masse1
- Direction
- did not have a significant effecte1
- Setting
- non-circulating hydroponic systeme2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativaL.) growth, yield and quality response to nitrogen fertilization in a non-circulating hydroponic system”
e1“Nitrogen treatments did not have a significant effect on leaf fresh and dry mass, root fresh and dry mass, number leaves and leaf area”
e2“grown during the winter season in non-circulating hydroponic system”
Claim · model-written summary
Nitrogen treatments did not significantly affect leaf number and leaf area of lettuce
- Taxon
- Lettuce (Lactuca sativaL.)Lactuca sativat0
- Treatment
- Nitrogen treatmentse1
- Outcome
- number leaves and leaf areae1
- Direction
- did not have a significant effecte1
- Setting
- non-circulating hydroponic systeme2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativaL.) growth, yield and quality response to nitrogen fertilization in a non-circulating hydroponic system”
e1“Nitrogen treatments did not have a significant effect on leaf fresh and dry mass, root fresh and dry mass, number leaves and leaf area”
e2“grown during the winter season in non-circulating hydroponic system”
Claim · model-written summary
Leaf ascorbic acid, total phenolic content and antioxidant capacity peaked at 100 and 120 mg L-1 N in lettuce
- Taxon
- Lettuce (Lactuca sativaL.)Lactuca sativat0
- Treatment
- nitrogen (N) concentrationse4
- Outcome
- Leaf ascorbic acid and total phenolic content, and antioxidant capacitye3
- Direction
- peakede3
- Qualifier
- 100 and 120 mg L−1 Ne3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativaL.) growth, yield and quality response to nitrogen fertilization in a non-circulating hydroponic system”
e3“Leaf ascorbic acid and total phenolic content, and antioxidant capacity peaked at 100 and 120 mg L−1 N, whereas leaf chlorophyll concentration linearly increased with increasing N application”
e4“Plants were subjected to seven nitrogen (N) concentrations”
Claim · model-written summary
Leaf chlorophyll concentration of lettuce increased linearly with increasing N application
- Taxon
- Lettuce (Lactuca sativaL.)Lactuca sativat0
- Treatment
- N applicatione3
- Outcome
- leaf chlorophyll concentratione3
- Direction
- linearly increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativaL.) growth, yield and quality response to nitrogen fertilization in a non-circulating hydroponic system”
e3“Leaf ascorbic acid and total phenolic content, and antioxidant capacity peaked at 100 and 120 mg L−1 N, whereas leaf chlorophyll concentration linearly increased with increasing N application”
Claim · model-written summary
A solution N concentration of 100 and 120 mg L-1 may be sufficient to improve growth, yield and quality of leafy lettuce in non-circulating hydroponics
Verbatim
e5“The results indicate that a solution N concentration of 100 and 120 mg L−1 may be sufficient to improve growth, yield and quality parameters of leafy lettuce grown in non-circulating hydroponic system”
The same questions in other papers
nitrogen · growth · Lactuca sativa (garden lettuce)Results differ
24 papers in the same direction as this paper · 60 in the opposite direction
- positive
- positive
- positive
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See all 85 papers →nitrogen · quality: phytochemicals · Lactuca sativa (garden lettuce)Positive and negative results
9 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- negative
12 papers more in this group
See all 16 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.