Abstract
Abstract in UndeterminedModern irrigation techniques are becoming increasingly important in water-scarce countries. In this study, a two-dimensional water and solute transport model, Hydrus-2D, was used to assess the impact of inter-plant emitter distance (IPED) and irrigation water salinity on soil moisture and salinity distribution as well as on water balance components under alternate partial root-zone surface drip irrigation (APRDI) of tomato growing in loamy sand soil. Three IPED (20, 30, and 40 cm) and three irrigation water salinity levels (0, 1, and 2 dS/m) were used to execute different simulation scenarios. Simulation results indicated that the fluctuations in water content within the root zone were more pronounced in case of 20 cm IPED. The root water uptake increased as the IPED decreased. Using brackish irrigation water in APRDI caused significant augmentation in soil salinity in the top soil layer especially at the location of plant. The impact of irrigation water salinity on root water uptake increased as the IPED increased. As irrigation water salinity increased the root water uptake decreased. At plant location, soil salinity reached its highest values at the top soil layer in case of 30 and 40 cm IPED with brackish irrigation water. However, high soil salinity values were observed between the 40 and 65 cm depths in case of 20 cm IPED. Based on the results, it appears that APRDI with non-saline irrigation water is more effective with short IPED considering that approximately half of the root system was exposed to drying cycle. In addition, short IPED is recommended in APRDI when using brackish irrigation water especially for plants with shallow root system taking into account crop salinity tolerance.
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Claims 9
Claim · model-written summary
Water-content fluctuations within the tomato root zone were more pronounced at 20 cm emitter spacing.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- 20 cm IPEDe0
- Outcome
- fluctuations in water content within the root zonee0
- Direction
- more pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fluctuations in water content within the root zone were more pronounced in case of 20 cm IPED”
t0“tomato”
Claim · model-written summary
Tomato root water uptake increased as emitter spacing decreased.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- IPEDe0
- Outcome
- root water uptakee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root water uptake increased as the IPED decreased.”
t0“tomato”
Claim · model-written summary
Brackish irrigation water increased topsoil salinity at the plant location.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- brackish irrigation watere0
- Outcome
- soil salinity in the top soil layere0
- Direction
- augmentatione0
- Setting
- location of plante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using brackish irrigation water in APRDI caused significant augmentation in soil salinity in the top soil layer especially at the location of plant.”
t0“tomato”
Claim · model-written summary
The effect of irrigation water salinity on root water uptake increased with emitter spacing.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- irrigation water salinitye0
- Outcome
- root water uptakee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impact of irrigation water salinity on root water uptake increased as the IPED increased.”
t0“tomato”
Claim · model-written summary
Root water uptake decreased as irrigation-water salinity increased.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- irrigation water salinitye0
- Outcome
- root water uptakee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As irrigation water salinity increased the root water uptake decreased.”
t0“tomato”
Claim · model-written summary
At the plant location, topsoil salinity was highest at 30 and 40 cm spacing with brackish water.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 30 and 40 cm IPED with brackish irrigation watere0
- Outcome
- soil salinitye0
- Direction
- higheste0
- Setting
- plant locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At plant location, soil salinity reached its highest values at the top soil layer in case of 30 and 40 cm IPED with brackish irrigation water.”
t0“tomato”
Claim · model-written summary
At 20 cm spacing, high soil salinity occurred at 40 to 65 cm depth.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 20 cm IPEDe0
- Outcome
- soil salinity valuese0
- Direction
- highe0
- Qualifier
- between the 40 and 65 cm depthse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high soil salinity values were observed between the 40 and 65 cm depths in case of 20 cm IPED”
t0“tomato”
Claim · model-written summary
The authors judged short spacing with nonsaline water more effective for APRDI.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- APRDI with non-saline irrigation water is more effective with short IPEDe0
- Qualifier
- approximately half of the root system was exposed to drying cyclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“APRDI with non-saline irrigation water is more effective with short IPED considering that approximately half of the root system was exposed to drying cycle”
t0“tomato”
Claim · model-written summary
The authors recommended short spacing with brackish water for shallow-rooted plants, accounting for salinity tolerance.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- short IPED is recommended in APRDI when using brackish irrigation watere0
- Qualifier
- plants with shallow root system taking into account crop salinity tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short IPED is recommended in APRDI when using brackish irrigation water especially for plants with shallow root system taking into account crop salinity tolerance”
t0“tomato”
The same questions in other papers
irrigation · soil: chemistry · Solanum lycopersicum (tomato)Positive and negative results
5 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
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.