Paper · 2012 · Journal of Plant Nutrition

INFLUENCE OF NITROGEN AND SALINITY LEVELS ON THE FRUIT YIELD AND CHEMICAL COMPOSITION OF TOMATO IN A HYDROPONIC CULTURE

M. Zahedifar; A. Ronaghi; A. A. Moosavi; et al.

11
claims
22
verbatim quotes
7
citations
2
research areas
—
Not open access

Abstract

Tomato seedlings were transferred to continuously, aerated plastic containers. Treatments consisted of three nitrogen (N) levels [0, 1.5, and 3% as ammonium chloride (NH4Cl) and ammonium phosphate (NH4H2PO4) 2:1 w/w] and three salinity levels (0, 30, and 60 mM using sodium chloride (NaCl) and calcium chloride (CaCl2)]. Results indicated significant positive and negative responses in fruits fresh weight to nitrogen and salinity treatments, respectively. Number of fruits and root length decreased at high salinity level. Phosphorus (P) content was highest in fruits and lowest in roots. Fruit P uptake decreased with salinity applications in N controls. At low salinity levels, N application mitigated the salinity detrimental effects; however, such an effect was not observed at the high salinity level. Nitrogen application significantly decreased iron, zinc, copper, and manganese concentration and uptake. Application of nitrogen and salinity levels significantly increased the citric acid content of tomato fruits. Vitamin C content of fruits was neither influenced by nitrogen nor by salinity.

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Claims 11

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Tomato fruit fresh weight responded significantly and positively to nitrogen treatment.

Treatment
nitrogene1
Outcome
fruits fresh weighte1
Direction
positivee1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“significant positive and negative responses in fruits fresh weight to nitrogen and salinity treatments, respectively”

✓ located verbatim in the source · abstract, characters 339–455 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Tomato fruit fresh weight responded significantly and negatively to salinity treatment.

Treatment
salinity treatmentse1
Outcome
fruits fresh weighte1
Direction
negativee1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“significant positive and negative responses in fruits fresh weight to nitrogen and salinity treatments, respectively”

✓ located verbatim in the source · abstract, characters 339–455 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Number of fruits and root length of tomato decreased at the high salinity level.

Treatment
high salinity levele1
Outcome
Number of fruits and root lengthe1
Direction
decreasede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“Number of fruits and root length decreased at high salinity level”

✓ located verbatim in the source · abstract, characters 457–522 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Phosphorus content in tomato was highest in fruits and lowest in roots.

Organ / stage
fruitse1
Outcome
Phosphorus (P) contente1
Qualifier
highest in fruits and lowest in rootse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“Phosphorus (P) content was highest in fruits and lowest in roots”

✓ located verbatim in the source · abstract, characters 524–588 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Fruit phosphorus uptake of tomato decreased with salinity applications in the nitrogen controls.

Treatment
salinity applicationse1
Outcome
Fruit P uptakee1
Direction
decreasede1
Qualifier
N controlse1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“Fruit P uptake decreased with salinity applications in N controls”

✓ located verbatim in the source · abstract, characters 590–655 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

At low salinity levels nitrogen application mitigated the detrimental effects of salinity on tomato.

Treatment
N applicatione1
Outcome
salinity detrimental effectse1
Direction
mitigatede1
Qualifier
low salinity levelse1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“At low salinity levels, N application mitigated the salinity detrimental effects”

✓ located verbatim in the source · abstract, characters 657–737 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Nitrogen application did not mitigate the detrimental effects of salinity at the high salinity level.

Treatment
N applicatione1
Outcome
salinity detrimental effectse1
Direction
not observede2
Qualifier
high salinity levele2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“N application mitigated the salinity detrimental effects”

✓ located verbatim in the source · abstract, characters 681–737 · show in text ↑
e2

“such an effect was not observed at the high salinity level”

✓ located verbatim in the source · abstract, characters 748–806 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Nitrogen application significantly decreased iron, zinc and copper concentration and uptake in tomato.

Treatment
Nitrogen applicatione1
Outcome
iron, zinc, coppere1
Direction
decreasede1
Qualifier
concentration and uptakee1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“Nitrogen application significantly decreased iron, zinc, copper, and manganese concentration and uptake”

✓ located verbatim in the source · abstract, characters 808–911 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Nitrogen application significantly decreased manganese concentration and uptake in tomato.

Treatment
Nitrogen applicatione1
Outcome
manganese concentration and uptakee1
Direction
decreasede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“Nitrogen application significantly decreased iron, zinc, copper, and manganese concentration and uptake”

✓ located verbatim in the source · abstract, characters 808–911 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Nitrogen and salinity levels significantly increased the citric acid content of tomato fruits.

Organ / stage
fruitse1
Treatment
nitrogen and salinity levelse1
Outcome
citric acid contente1
Direction
increasede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Application of nitrogen and salinity levels significantly increased the citric acid content of tomato fruits”

✓ located verbatim in the source · abstract, characters 913–1021 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Vitamin C content of tomato fruits was influenced neither by nitrogen nor by salinity.

Organ / stage
fruitse1
Treatment
nitrogen nor by salinitye1
Outcome
Vitamin C contente1
Direction
neither influencede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Tomato seedlings”

✓ located verbatim in the source · abstract, characters 0–16 · show in text ↑
e1

“Vitamin C content of fruits was neither influenced by nitrogen nor by salinity”

✓ located verbatim in the source · abstract, characters 1023–1101 · show in text ↑

nitrogen · nutrient: content · Solanum lycopersicum (tomato)Results differ

77 papers: 59 positive, 18 negative or no effect

17 papers in the same direction as this paper · 59 in the opposite direction

  1. positive
  2. positive
  3. positive

73 papers more in this group

See all 77 papers →

nitrogen · quality: phytochemicals · Solanum lycopersicum (tomato)Positive and negative results

27 papers: 19 positive, 8 negative or no effect

7 papers in the same direction as this paper · 19 in the opposite direction

  1. positive
  2. positive
  3. positive

23 papers more in this group

See all 27 papers →

salinity · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results

66 papers: 8 positive, 58 negative or no effect

57 papers in the same direction as this paper · 8 in the opposite direction

  1. positive
  2. negative
  3. positive

62 papers more in this group

See all 66 papers →

nitrogen · growth · Solanum lycopersicum (tomato)Positive and negative results

153 papers: 108 positive, 45 negative or no effect

107 papers in the same direction as this paper · 45 in the opposite direction

  1. positive
  2. negative
  3. negative

149 papers more in this group

See all 153 papers →

salinity · yield · Solanum lycopersicum (tomato)Positive and negative results

160 papers: 18 positive, 142 negative or no effect

141 papers in the same direction as this paper · 18 in the opposite direction

  1. negative
  2. negative
  3. negative

156 papers more in this group

See all 160 papers →

salinity · growth · Solanum lycopersicum (tomato)Positive and negative results

300 papers: 39 positive, 261 negative or no effect

260 papers in the same direction as this paper · 39 in the opposite direction

  1. positive
  2. negative
  3. negative

296 papers more in this group

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.