Abstract
Abstract Use of saline drainage water for crop irrigation has been proposed as a strategy to reduce drainage volume and conserve good quality water. Over a 6‐yr period, two cyclic drainage‐water reuse practices were tested in a 3‐yr rotation of processing tomato ( Lycopersicon esculentum L.) and cotton ( Gossypium hirsutum L.). In both practices, drainage water (EC i = 7.4 dS m −1 and 0.74 mmol L −1 B) was applied to processing tomato after first bloom to take advantage of salt‐induced enhancement of fruit quality and increased crop salt tolerance at later developmental stages. In one practice, drainage water was also applied to the following cotton crop after thinning. Nonsaline water was used for irrigation at all other times and throughout for the control. When saline water was applied once every 3 yr, yields of both crops were unaffected. Tomato yields were generally lowest when saline water was applied 2 out of 3 yr, but saline water improved tomato fruit quality by increasing °Brix in most years. Changes in soil chemical and physical quality may limit long‐term reuse. Both B and salts accumulated in the soil over time, particularly at depth (60–140 cm), whereas Se was more readily leached and showed greater fluctuations in the rootzone with irrigation treatment. Calculations using reclamation formulae estimated that for low B drainage water, the amount of drainage wager used exceeded that of nonsaline water needed to return soil EC e to control levels, resulting in significant water savings. For high B drainage water, more than twice the amount of nonsaline water was needed to fully reclaim the profile than was saved by reuse. However, moderately B‐tolerant crops could be successfully grown during the reclamation period, making cyclic reuse for at least 6 yr an attractive option for growers facing limited supplies of nonsaline water supplies, or as a means to reduce effluent volumes.
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Claims 9
Claim · model-written summary
Applying saline water once every three years did not affect tomato yield.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- saline watere0
- Outcome
- yieldse0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When saline water was applied once every 3 yr, yields of both crops were unaffected.”
t0“Tomato‐Cotton”
Claim · model-written summary
Applying saline water once every three years did not affect cotton yield.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- saline watere0
- Outcome
- yieldse0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When saline water was applied once every 3 yr, yields of both crops were unaffected.”
t0“Tomato‐Cotton”
Claim · model-written summary
Tomato yields were generally lowest with saline water in two of three years.
- Taxon
- TomatoSolanum lycopersicume0
- Treatment
- saline water was applied 2 out of 3 yre0
- Outcome
- yieldse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato yields were generally lowest when saline water was applied 2 out of 3 yr”
Claim · model-written summary
Saline water increased tomato fruit °Brix in most years.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- saline watere0
- Outcome
- °Brixe0
- Direction
- increasinge0
- Qualifier
- in most yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saline water improved tomato fruit quality by increasing °Brix in most years”
Claim · model-written summary
Soil boron and salts accumulated over time, especially at depth.
Not reportedTaxon
Verbatim
e0“Both B and salts accumulated in the soil over time, particularly at depth (60–140 cm)”
Claim · model-written summary
Selenium leached more readily and fluctuated more in the root zone with irrigation treatment.
- Treatment
- irrigation treatmente0
- Outcome
- Se was more readily leached and showed greater fluctuations in the rootzonee0
- Direction
- more readilye0
Not reportedTaxon
Verbatim
e0“Se was more readily leached and showed greater fluctuations in the rootzone with irrigation treatment”
Claim · model-written summary
For low-boron drainage water, reclamation calculations indicated significant water savings.
Not reportedTaxon
Verbatim
e0“for low B drainage water, the amount of drainage wager used exceeded that of nonsaline water needed to return soil EC e to control levels, resulting in significant water savings”
Claim · model-written summary
For high-boron drainage water, full reclamation required more than twice the nonsaline water saved by reuse.
- Outcome
- amount of nonsaline water was needed to fully reclaim the profilee0
- Direction
- more than twicee0
- Value
- more than twicee0
Not reportedTaxon
Verbatim
e0“For high B drainage water, more than twice the amount of nonsaline water was needed to fully reclaim the profile than was saved by reuse”
Claim · model-written summary
The authors consider cyclic reuse for at least six years attractive where nonsaline water is limited or effluent reduction is needed.
Verbatim
e0“moderately B‐tolerant crops could be successfully grown during the reclamation period, making cyclic reuse for at least 6 yr an attractive option for growers facing limited supplies of nonsaline water supplies, or as a means to reduce effluent volumes”
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See all 160 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.