Abstract
Understanding how moisture deficit stress alters cotton (Gossypium hirsutum L.) reproductive growth and yield component development would provide insight into the current yield stagnation problem plaguing U.S. cotton producers. Objectives were to document the effects of moisture deficit stress on reproductive growth, lint yield, yield components, boll distribution, and fiber quality. Field studies were conducted from 1998 through 2001 utilizing eight diverse genotypes, which were grown under both dryland and irrigated conditions. Weekly white bloom counts, nodes above white bloom, lint yield, yield components, end-of-season plant mapping, and fiber quality data were collected. Genotypes responded similarly to the two soil moisture regimes for all of the parameters evaluated. Irrigation delayed cutout, the slowing of vegetative growth due to strong reproductive demand for assimilate, an average of 6 d. This delayed maturity enabled those plants to sustain flowering later in the growing season compared with dryland plants. During the years when sufficient moisture deficits occurred, the lint yield of dryland plants was reduced 25%, primarily because of a 19% reduction in number of bolls. Irrigated plants produced more bolls at higher plant nodes (>Node 10) and at the more distal positions (≥2) on the sympodial branches than did the dryland plants. Irrigation did not affect most fiber traits, but 3 out of 4 yr of irrigation produced approximately 2% longer fiber. Production of more bolls higher up the plant and further out the fruiting branch with irrigation indicates that these areas on the plant are where high yields need to be stabilized.
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Claims 10
Claim · model-written summary
Eight cotton genotypes responded similarly to dryland and irrigated conditions across evaluated parameters.
- Taxon
- cotton
Gossypium hirsutume0 - Material
- Genotypese1
- Outcome
- responded similarly to the two soil moisture regimese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“Genotypes responded similarly to the two soil moisture regimes for all of the parameters evaluated”
Claim · model-written summary
Irrigation delayed cotton cutout by an average of six days.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“Irrigation delayed cutout, the slowing of vegetative growth due to strong reproductive demand for assimilate, an average of 6 d”
Claim · model-written summary
Irrigated cotton sustained flowering later than dryland cotton.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- floweringe1
- Direction
- latere1
- Comparator
- dryland plantse1
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“plants to sustain flowering later in the growing season compared with dryland plants”
Claim · model-written summary
Dryland cotton lint yield was reduced 25% during years with sufficient moisture deficits.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“During the years when sufficient moisture deficits occurred, the lint yield of dryland plants was reduced 25%”
Claim · model-written summary
The number of bolls in dryland cotton was reduced 19% during moisture deficit years.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- drylande2
- Outcome
- number of bollse1
- Direction
- reductione1
- Value
- 19%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“primarily because of a 19% reduction in number of bolls”
e2“the lint yield of dryland plants was reduced 25%”
Claim · model-written summary
Irrigated cotton produced more bolls above node 10 than dryland cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Irrigatede1
- Outcome
- bolls at higher plant nodese1
- Direction
- moree1
- Qualifier
- >Node 10e1
- Comparator
- dryland plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“Irrigated plants produced more bolls at higher plant nodes (>Node 10) and at the more distal positions (≥2) on the sympodial branches than did the dryland plants”
Claim · model-written summary
Irrigated cotton produced more bolls at distal sympodial branch positions than dryland cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Irrigatede1
- Outcome
- bollse1
- Direction
- moree1
- Qualifier
- more distal positions (≥2) on the sympodial branchese1
- Comparator
- dryland plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“Irrigated plants produced more bolls at higher plant nodes (>Node 10) and at the more distal positions (≥2) on the sympodial branches than did the dryland plants”
Claim · model-written summary
Irrigation did not affect most cotton fiber traits.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Irrigatione1
- Outcome
- most fiber traitse1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“Irrigation did not affect most fiber traits”
Claim · model-written summary
In three of four years irrigation produced approximately 2% longer cotton fiber.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- irrigatione1
- Outcome
- fibere1
- Direction
- longere1
- Value
- approximately 2%e1
- Qualifier
- 3 out of 4 yre1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“3 out of 4 yr of irrigation produced approximately 2% longer fiber”
Claim · model-written summary
The authors identify upper and distal fruiting positions as areas where cotton yield needs stabilization.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- high yields need to be stabilizede1
- Qualifier
- higher up the plant and further out the fruiting branche2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“these areas on the plant are where high yields need to be stabilized”
e2“more bolls higher up the plant and further out the fruiting branch”
The same questions in other papers
irrigation · quality: grain · Gossypium hirsutum (cotton)Positive and negative results
72 papers in the same direction as this paper · 55 in the opposite direction · 6 reporting no difference from an alternative
- negative
- negative
- negative
130 papers more in this group
See all 134 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.