Abstract
Abstract Cotton ( Gossypium hirsutum L.) yields can vary considerably among years and locations, even under levels of water and nutrients considered adequate. Since photosynthesis is one of the principal components in determining reproductive yield, the objectives of this study were to determine how manipulations of the ratio of photosynthetic source to reproductive sink affect cotton lint yield and yield components (boll mass, seed mass, seed per boll, lint percentage, and bolls per square meter). Field studies were conducted in 1991 and 1992 on a Bosket fine sandy loam with six source‐to‐sink ratio manipulations (partial fruit pruned, partial leaf pruned, reflectors, open canopy, shaded plots, and an untreated control) imposed on three cotton genotypes: ‘DES 119’, ‘DPL 5690’, and ‘Prema’. White blooms were tagged twice in both years, and fruit were subsequently harvested after bolls had opened. These bolls were ginned and boll mass, lint percentage, and seed mass were determined. Overall lint yield and yield components were determined for the reflector, open canopy, shaded plot, and control treatments. The partial fruit pruned treatment had a 16% greater boll mass and a 10% greater seed mass than the control. Percentage lint was not affected by any of the treatments. In 1992, bolls at the first sympodial position (fruit at all other positions were pruned from the sympodial branches) had a 25% greater boll mass and 8% greater seed mass than bolls at the second sympodial position (fruit at all other positions were pruned from the sympodial branches) and control treatment bolls from the first tagging. Position 1 and Position 2 bolls did not differ in boll or seed mass during the second tagging period (both greater than the control) or in percent fruit abortion during either tagging period (both lower than the control). Lint yields from the open canopy and reflector treatments were 17% and 6% greater than the control, respectively, and the shaded plot yielded 20% less than the control. Boll number was the component of yield that accounted for these differences. Cotton canopies bred for increased light penetration to lower leaves or for better utilization of the intercepted light may lead to lint yield increases.
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Claims 11
Claim · model-written summary
Partial fruit pruning gave 16% greater boll mass than the control.
- Taxon
- Gossypium hirsutum
Gossypium hirsutume0 - Treatment
- partial fruit prunede1
- Outcome
- boll masse1
- Direction
- greatere1
- Value
- 16%e1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e1“The partial fruit pruned treatment had a 16% greater boll mass and a 10% greater seed mass than the control”
Claim · model-written summary
Partial fruit pruning gave 10% greater seed mass than the control.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- partial fruit prunede1
- Outcome
- seed masse1
- Direction
- greatere1
- Value
- 10%e1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e1“The partial fruit pruned treatment had a 16% greater boll mass and a 10% greater seed mass than the control”
Claim · model-written summary
Percentage lint was not affected by any of the source-to-sink treatments.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- treatmentse2
- Outcome
- Percentage linte2
- Direction
- not affectede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e2“Percentage lint was not affected by any of the treatments”
Claim · model-written summary
Bolls at the first sympodial position had 25% greater boll mass than bolls at the second sympodial position in 1992.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- first sympodial positione3
- Outcome
- boll masse3
- Direction
- greatere3
- Value
- 25%e3
- Comparator
- second sympodial positione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e3“bolls at the first sympodial position (fruit at all other positions were pruned from the sympodial branches) had a 25% greater boll mass and 8% greater seed mass than bolls at the second sympodial position”
Claim · model-written summary
Bolls at the first sympodial position had 8% greater seed mass than bolls at the second sympodial position in 1992.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- first sympodial positione3
- Outcome
- seed masse3
- Direction
- greatere3
- Value
- 8%e3
- Comparator
- second sympodial positione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e3“bolls at the first sympodial position (fruit at all other positions were pruned from the sympodial branches) had a 25% greater boll mass and 8% greater seed mass than bolls at the second sympodial position”
Claim · model-written summary
Position 1 and Position 2 bolls did not differ in boll or seed mass during the second tagging period.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- Position 1e4
- Outcome
- boll or seed masse4
- Direction
- did not differe4
- Qualifier
- second tagging periode4
- Comparator
- Position 2e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e4“Position 1 and Position 2 bolls did not differ in boll or seed mass during the second tagging period”
Claim · model-written summary
The shaded plot yielded 20% less lint than the control.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- shaded plote5
- Outcome
- Lint yielde5
- Direction
- lesse5
- Value
- 20%e5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e5“Lint yields from the open canopy and reflector treatments were 17% and 6% greater than the control, respectively, and the shaded plot yielded 20% less than the control”
Claim · model-written summary
The open canopy treatment gave 17% greater lint yield than the control.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- open canopye5
- Outcome
- Lint yielde5
- Direction
- greatere5
- Value
- 17%e5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e5“Lint yields from the open canopy and reflector treatments were 17% and 6% greater than the control, respectively, and the shaded plot yielded 20% less than the control”
Claim · model-written summary
The reflector treatment gave 6% greater lint yield than the control.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- reflectore5
- Outcome
- Lint yielde5
- Direction
- greatere5
- Value
- 6%e5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e5“Lint yields from the open canopy and reflector treatments were 17% and 6% greater than the control, respectively, and the shaded plot yielded 20% less than the control”
Claim · model-written summary
Boll number was the yield component that accounted for the lint yield differences among treatments.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Outcome
- component of yield that accounted for these differencese6
- Qualifier
- Boll numbere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.)”
e6“Boll number was the component of yield that accounted for these differences”
Claim · model-written summary
Cotton canopies bred for more light penetration or better use of intercepted light may increase lint yield.
- Taxon
- CottonGossypium hirsutume7
- Outcome
- lint yield increasese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Cotton canopies bred for increased light penetration to lower leaves or for better utilization of the intercepted light may lead to lint yield increases”
The same questions in other papers
pruning · yield · Gossypium hirsutum (cotton)Results differ
48 papers in the same direction as this paper · 23 in the opposite direction · 4 reporting no difference from an alternative
- positive
- no effect
- no effect
72 papers more in this group
See all 76 papers →shade · quality: grain · Gossypium hirsutum (cotton)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- negative
7 papers more in this group
See all 11 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.