Abstract
Summary Use of saline drainage water for crop irrigation was evaluated as a means of decreasing its volume. Results of a nine-year crop rotation (cotton-cotton-safflower, × 3) in which only the cotton was irrigated with drainage water of 400, 1,500, 3,000, 4,500, 6,000, and 9,000 ppm total dissolved salts are presented. The different salinity levels of irrigation waters were achieved by mixing nonsaline canal water (400 ppm) and saline drainage water. Cotton lint yields were not affected by increased salinity level of the irrigation water for the first two years. Detrimental effects became evident in the third cotton crop with increasing severity in later years. In the fifth year of cotton (seventh year of the study), lint yields were adversely affected by waters of salinity greater than 3,000 ppm. However, fiber quality remained unaffected at all levels of irrigation water salinity. The reductions in lint yield appeared to be a function of time and the salinity level of applied water. Shoot height and biomass were reduced by the irrigation water salinity before lint yields. Stand establishment appeared to be the most sensitive to salinity and was perhaps the main reason for yield reduction. Increase in irrigation water salinity increased Na+ content of leaf blades and petioles and decreased K+/Na+ ratio of leaf blades and petioles. The study showed that irrigation waters of up to 3,000 ppm salinity may be used for four years without any yield reductions, as long as some leaching occurs through preplant irrigations with low salinity water. Data on crop growth and development and ionic content collected over the nine year period are presented.
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Claims 10
Claim · model-written summary
Cotton lint yield was unaffected by higher irrigation-water salinity for two years.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- increased salinity level of the irrigation watere0
- Outcome
- Cotton lint yieldse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton lint yields were not affected by increased salinity level of the irrigation water for the first two years.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Detrimental yield effects emerged in the third cotton crop and became more severe later.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- Detrimental effectse0
- Direction
- increasing severitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Detrimental effects became evident in the third cotton crop with increasing severity in later years.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
In the fifth cotton year, waters above 3,000 ppm adversely affected lint yields.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- waters of salinity greater than 3,000 ppme0
- Outcome
- lint yieldse0
- Direction
- adversely affectede0
- Value
- 3,000 ppme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the fifth year of cotton (seventh year of the study), lint yields were adversely affected by waters of salinity greater than 3,000 ppm.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Fiber quality remained unaffected at all salinity levels.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- irrigation water salinitye0
- Outcome
- fiber qualitye0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fiber quality remained unaffected at all levels of irrigation water salinity.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Lint yield reductions appeared related to time and applied-water salinity.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- salinity level of applied watere0
- Outcome
- reductions in lint yielde0
- Direction
- reductionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reductions in lint yield appeared to be a function of time and the salinity level of applied water.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Irrigation-water salinity reduced shoot height and biomass before lint yield.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- irrigation water salinitye0
- Outcome
- Shoot height and biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot height and biomass were reduced by the irrigation water salinity before lint yields.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Stand establishment appeared most sensitive to salinity.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- salinitye0
- Outcome
- Stand establishmente0
- Direction
- most sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stand establishment appeared to be the most sensitive to salinity and was perhaps the main reason for yield reduction.”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Higher irrigation-water salinity increased Na+ content in leaf blades and petioles.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- irrigation water salinitye0
- Outcome
- Na+ content of leaf blades and petiolese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in irrigation water salinity increased Na+ content of leaf blades and petioles”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Higher irrigation-water salinity decreased leaf-blade and petiole K+/Na+ ratio.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- irrigation water salinitye0
- Outcome
- K+/Na+ ratio of leaf blades and petiolese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation water salinity increased Na+ content of leaf blades and petioles and decreased K+/Na+ ratio of leaf blades and petioles”
t0“Cotton (Gossypium hirsutumL.)”
Claim · model-written summary
Irrigation water up to 3,000 ppm may be used four years without yield loss if preplant low-salinity water provides leaching.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- irrigation waters of up to 3,000 ppm salinity may be used for four years without any yield reductionse0
- Value
- 3,000 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation waters of up to 3,000 ppm salinity may be used for four years without any yield reductions, as long as some leaching occurs through preplant irrigations with low salinity water.”
t0“Cotton (Gossypium hirsutumL.)”
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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.