Paper · 2026 · Irrigation Science

Effect of saline irrigation on yield and fruit quality of tomato and rockmelon grown on sandy soils under Mediterranean climatic conditions

Lukasz Kotula; Adrian Forrest; Simon Yeap; et al.

8
claims
12
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by

Abstract

Abstract Saline water is increasingly being considered for irrigation in arid and semi-arid regions amid growing pressure on freshwater supplies. This study aimed to evaluate the impact of saline irrigation on yield and fruit quality of tomato and rockmelon grown on coarse sandy soils under a Mediterranean climate in Western Australia. Two field experiments were conducted over consecutive seasons using drip irrigation and plastic mulch. Tomato and rockmelon were irrigated with water of five salinity levels (EC i 0.4, 2.5, 5.0, 7.5, and 10 dS/m). Soil salinity (EC e ), plant ion content, yield, and fruit quality – including total soluble solids (TSS), acidity, firmness, and bioactive compounds – were measured. Irrigation water with EC i ≤ 2.5 dS/m did not significantly affect marketable yield in either crop. Marketable yield declined by ~ 7–8% per unit EC i above this threshold, mainly due to reduced fruit size. In tomato, saline irrigation enhanced TSS (up to 49% increase), acidity, and concentrations of phenolics, flavonoids, and antioxidants. Rockmelon fruit quality, including TSS (~ 12 °Brix), firmness, and nutritional content, was unaffected by salinity or postharvest storage. Moderate saline irrigation (EC i ≤ 2.5 dS/m) can be used for tomato and rockmelon cultivation on coarse sandy soils without adverse effects on yield or quality. Higher salinity improved tomato fruit quality, which may compensate for yield losses.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 8

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Irrigation water with EC up to 2.5 dS/m did not significantly affect marketable yield of either crop.

Taxon
tomato and rockmelone0
Treatment
Irrigation water with EC i ≤ 2.5 dS/me1
Outcome
marketable yielde1
Direction
did not significantly affecte1
Qualifier
in either crope1

Not reportedComparator

Verbatim

e0

“yield and fruit quality of tomato and rockmelon”

✓ located verbatim in the source · abstract, characters 210–257 · show in text ↑
e1

“Irrigation water with EC i ≤ 2.5 dS/m did not significantly affect marketable yield in either crop”

✓ located verbatim in the source · abstract, characters 719–817 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Marketable yield declined by about 7–8% per unit EC above the threshold, mainly due to reduced fruit size.

Taxon
tomato and rockmelone0
Treatment
above this thresholde2
Outcome
marketable yielde2
Direction
declinede2
Value
~ 7–8%e2
Qualifier
mainly due to reduced fruit sizee2
Comparator
this thresholde2

Verbatim

e0

“yield and fruit quality of tomato and rockmelon”

✓ located verbatim in the source · abstract, characters 210–257 · show in text ↑
e2

“Marketable yield declined by ~ 7–8% per unit EC i above this threshold, mainly due to reduced fruit size”

✓ located verbatim in the source · abstract, characters 819–923 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Saline irrigation enhanced total soluble solids in tomato by up to 49%.

Treatment
saline irrigatione3
Outcome
TSSe3
Direction
enhancede3
Value
up to 49%e3

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

e3

“In tomato, saline irrigation enhanced TSS (up to 49% increase), acidity, and concentrations of phenolics, flavonoids, and antioxidants”

✓ located verbatim in the source · abstract, characters 925–1059 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Saline irrigation enhanced acidity and phenolic and flavonoid concentrations in tomato fruit.

Treatment
saline irrigatione3
Outcome
acidity, and concentrations of phenolics, flavonoidse3
Direction
enhancede3

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

e3

“In tomato, saline irrigation enhanced TSS (up to 49% increase), acidity, and concentrations of phenolics, flavonoids, and antioxidants”

✓ located verbatim in the source · abstract, characters 925–1059 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Saline irrigation enhanced antioxidant concentrations in tomato fruit.

Treatment
saline irrigatione3
Outcome
antioxidantse3
Direction
enhancede3

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

e3

“In tomato, saline irrigation enhanced TSS (up to 49% increase), acidity, and concentrations of phenolics, flavonoids, and antioxidants”

✓ located verbatim in the source · abstract, characters 925–1059 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Rockmelon fruit quality was unaffected by salinity or postharvest storage.

Taxon
Rockmelone4
Treatment
salinity or postharvest storagee4
Outcome
fruit quality, including TSS (~ 12 °Brix), firmness, and nutritional contente4
Direction
unaffectede4

Not reportedComparator

Verbatim

e0

“yield and fruit quality of tomato and rockmelon”

✓ located verbatim in the source · abstract, characters 210–257 · show in text ↑
e4

“Rockmelon fruit quality, including TSS (~ 12 °Brix), firmness, and nutritional content, was unaffected by salinity or postharvest storage”

✓ located verbatim in the source · abstract, characters 1061–1198 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Moderate saline irrigation (EC up to 2.5 dS/m) can be used for tomato and rockmelon cultivation on coarse sandy soils without adverse effects.

Taxon
tomato and rockmelone0
Outcome
cultivation on coarse sandy soils without adverse effects on yield or qualitye5

Verbatim

e0

“yield and fruit quality of tomato and rockmelon”

✓ located verbatim in the source · abstract, characters 210–257 · show in text ↑
e5

“Moderate saline irrigation (EC i ≤ 2.5 dS/m) can be used for tomato and rockmelon cultivation on coarse sandy soils without adverse effects on yield or quality”

✓ located verbatim in the source · abstract, characters 1200–1359 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Higher salinity improved tomato fruit quality, which may compensate for yield losses.

Treatment
Higher salinitye6
Outcome
fruit qualitye6
Direction
improvede6

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

e6

“Higher salinity improved tomato fruit quality, which may compensate for yield losses”

✓ located verbatim in the source · abstract, characters 1361–1445 · show in text ↑

salinity · quality: sugar starch · Solanum lycopersicum (tomato)Results differ

51 papers: 44 positive, 7 negative or no effect

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

  1. negative
  2. negative
  3. negative

47 papers more in this group

See all 51 papers →

irrigation · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results

51 papers: 33 positive, 18 negative or no effect

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

  1. negative
  2. no effect
  3. negative

47 papers more in this group

See all 51 papers →

irrigation · quality: sugar starch · Solanum lycopersicum (tomato)Positive and negative results

63 papers: 46 positive, 17 negative or no effect

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

  1. negative
  2. negative
  3. negative

59 papers more in this group

See all 63 papers →

salinity · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results

82 papers: 32 positive, 50 negative or no effect

31 papers in the same direction as this paper · 49 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. no effect

78 papers more in this group

See all 82 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.