Abstract
The gradual depletion of the Ogallala Aquifer in the Southern High Plains of Texas has resulted in reduced well capacities for cotton (Gossypium spp.) irrigation. This study investigated cotton cultivar responses to reduced irrigation from flowering to harvest (2013); and then evaluated season long water deficits and the impact of the timing and amount of irrigation (2014). In 2013, field-grown cotton irrigated with 5 mm per day irrigation showed relatively low stress levels as exemplified by efficiency of quantum yield values between 0.17 and 0.23. Reducing irrigation levels from 5 mm per day to 2.5 mm per day at flowering produced a range of stress levels of Fv/Fm from 0.28 to 0.54. In 2014, four of the commercial cultivars were grown in replicated plots receiving either 2.5 mm of irrigation per day or 17.5 mm of irrigation once a week. Cultivar differences in plant stress were detected for the daily and weekly irrigation strategies. Changes in plant size, boll production, and timing of cutout were observed. FM 2484B2F and Phytogen 72 exhibited no yield differences between the irrigation regimes, while All-Tex Edge and Phytogen 367 showed yield decreases (20% and 25%) under the 2.5 mm daily irrigation regime. Alteration of the timing for the limited irrigation can impact existing stress sensitivities by reducing stress levels and increasing yields.
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Claims 10
Claim · model-written summary
At 5 mm daily irrigation, field cotton had low stress with quantum yield efficiency of 0.17 to 0.23.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- 5 mm per day irrigatione0
- Outcome
- efficiency of quantum yielde0
- Value
- 0.17 and 0.23e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“field-grown cotton irrigated with 5 mm per day irrigation showed relatively low stress levels as exemplified by efficiency of quantum yield values between 0.17 and 0.23”
Claim · model-written summary
Reducing irrigation at flowering produced Fv/Fm stress values of 0.28 to 0.54.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- floweringe0
- Treatment
- 2.5 mm per daye0
- Outcome
- stress levels of Fv/Fme0
- Value
- 0.28 to 0.54e0
- Comparator
- 5 mm per daye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing irrigation levels from 5 mm per day to 2.5 mm per day at flowering produced a range of stress levels of Fv/Fm from 0.28 to 0.54”
t0“Cotton Cultivars”
Claim · model-written summary
Cultivars differed in plant stress under daily and weekly irrigation.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- daily and weekly irrigation strategiese0
- Outcome
- plant stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivar differences in plant stress were detected for the daily and weekly irrigation strategies”
t0“Cotton Cultivars”
Claim · model-written summary
Irrigation strategies changed plant size, boll production, and timing of cutout.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- plant size, boll production, and timing of cutoute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in plant size, boll production, and timing of cutout were observed”
t0“Cotton Cultivars”
Claim · model-written summary
FM 2484B2F showed no yield difference between irrigation regimes.
- Taxon
- CottonGossypium hirsutumt0
- Material
- FM 2484B2Fe0
- Treatment
- irrigation regimese0
- Outcome
- yield differencese0
- Direction
- no yield differencese0
- Comparator
- irrigation regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FM 2484B2F and Phytogen 72 exhibited no yield differences between the irrigation regimes”
t0“Cotton Cultivars”
Claim · model-written summary
Phytogen 72 showed no yield difference between irrigation regimes.
- Taxon
- CottonGossypium hirsutumt0
- Material
- Phytogen 72e0
- Treatment
- irrigation regimese0
- Outcome
- yield differencese0
- Direction
- no yield differencese0
- Comparator
- irrigation regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FM 2484B2F and Phytogen 72 exhibited no yield differences between the irrigation regimes”
t0“Cotton Cultivars”
Claim · model-written summary
All-Tex Edge yield decreased 20% under daily 2.5 mm irrigation.
- Taxon
- CottonGossypium hirsutumt0
- Material
- All-Tex Edgee0
- Treatment
- 2.5 mm daily irrigation regimee0
- Outcome
- yielde0
- Direction
- decreasese0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All-Tex Edge and Phytogen 367 showed yield decreases (20% and 25%) under the 2.5 mm daily irrigation regime”
t0“Cotton Cultivars”
Claim · model-written summary
Phytogen 367 yield decreased 25% under daily 2.5 mm irrigation.
- Taxon
- CottonGossypium hirsutumt0
- Material
- Phytogen 367e0
- Treatment
- 2.5 mm daily irrigation regimee0
- Outcome
- yielde0
- Direction
- decreasese0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All-Tex Edge and Phytogen 367 showed yield decreases (20% and 25%) under the 2.5 mm daily irrigation regime”
t0“Cotton Cultivars”
Claim · model-written summary
Changing limited-irrigation timing can reduce stress.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Alteration of the timing for the limited irrigatione0
- Outcome
- stress levelse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alteration of the timing for the limited irrigation can impact existing stress sensitivities by reducing stress levels and increasing yields”
t0“Cotton Cultivars”
Claim · model-written summary
Changing limited-irrigation timing can increase yields.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Alteration of the timing for the limited irrigatione0
- Outcome
- yieldse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alteration of the timing for the limited irrigation can impact existing stress sensitivities by reducing stress levels and increasing yields”
t0“Cotton Cultivars”
The same questions in other papers
irrigation · yield · Gossypium hirsutum (cotton)Positive and negative results
303 papers in the same direction as this paper · 86 in the opposite direction · 9 reporting no difference from an alternative
- no effect
- positive
- positive
395 papers more in this group
See all 399 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.