Abstract
Yield and fiber quality of cotton even varies within locules in a boll, but it is not clear how yield components and quality parameters are altered across seed positions of a locule(SPL). A field experiment was arranged in a split plot design with transgenic insect resistant Bt(Bacillus thuringiensis) cotton hybrid cultivar CRI75 and conventional cultivar SCRC28 as the main plots, and three plant densities(15 000, 51 000 and 87 000 plants ha–1) as the subplots in 2012 and 2013 at Anyang, Henan Province, China. Cotton was hand harvested by node and fruiting position, and then seeds of the first fruiting position bolls from nodes 6–10 were separated by SPL. The effects of plant density on lint yield, fiber quality, especially across SPL were determined. It was showed that plant densities of 51 000 and 87 000 plants ha–1 increased lint yield by 61.3 and 65.3% in 2012 and 17.8 and 15.5% in 2013 relative to low plant density(15 000 plants ha–1), however, no significant difference was observed between 51 000 and 87 000 plants ha–1. The number of bolls(boll density) increased while boll weight decreased as plant density raised, and no significant changes occured in lint percentage in 2013 but increased with plant density in 2012. The number of bolls in upper nodes and distal fruiting positions, the number of seeds per boll, seed area(SA) and seed vigor index increased with decreasing plant density. Seed area was found to be greater from the base to the middle compared to the apex of a locule. Mote frequency(MF) increased as plant density increased, and fiber quality was the best at the middle of the locule regardless of plant density. As the number of fibers per seed area is genetically determined, adjusting plant density to produce more seeds and greater seed area can be a potentially promising alternative to improve lint yield in cotton. These findings might be of great importantance to cotton breeding and filed management.
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Claims 15
Claim · model-written summary
At 51 000 plants ha–1 cotton lint yield increased 61.3% in 2012 versus 15 000 plants ha–1.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- 51 000e0
- Outcome
- lint yielde0
- Direction
- increasede0
- Value
- 61.3e0
- Qualifier
- 2012e0
- Comparator
- 15 000 plants ha–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant densities of 51 000 and 87 000 plants ha–1 increased lint yield by 61.3 and 65.3% in 2012 and 17.8 and 15.5% in 2013 relative to low plant density(15 000 plants ha–1)”
t0“cotton”
Claim · model-written summary
At 87 000 plants ha–1 cotton lint yield increased 65.3% in 2012 versus low density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 87 000 plants ha–1e0
- Outcome
- lint yielde0
- Direction
- increasede0
- Value
- 65.3%e0
- Qualifier
- 2012e0
- Comparator
- 15 000 plants ha–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant densities of 51 000 and 87 000 plants ha–1 increased lint yield by 61.3 and 65.3% in 2012 and 17.8 and 15.5% in 2013 relative to low plant density(15 000 plants ha–1)”
t0“cotton”
Claim · model-written summary
At 51 000 plants ha–1 cotton lint yield increased 17.8% in 2013 versus low density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 51 000e0
- Outcome
- lint yielde0
- Direction
- increasede0
- Value
- 17.8e0
- Qualifier
- 2013e0
- Comparator
- 15 000 plants ha–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant densities of 51 000 and 87 000 plants ha–1 increased lint yield by 61.3 and 65.3% in 2012 and 17.8 and 15.5% in 2013 relative to low plant density(15 000 plants ha–1)”
t0“cotton”
Claim · model-written summary
At 87 000 plants ha–1 cotton lint yield increased 15.5% in 2013 versus low density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 87 000 plants ha–1e0
- Outcome
- lint yielde0
- Direction
- increasede0
- Value
- 15.5%e0
- Qualifier
- 2013e0
- Comparator
- 15 000 plants ha–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant densities of 51 000 and 87 000 plants ha–1 increased lint yield by 61.3 and 65.3% in 2012 and 17.8 and 15.5% in 2013 relative to low plant density(15 000 plants ha–1)”
t0“cotton”
Claim · model-written summary
Lint yield did not differ significantly between cotton densities of 51 000 and 87 000 plants ha–1.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 51 000e0
- Outcome
- differencee0
- Direction
- no significant differencee0
- Comparator
- 87 000 plants ha–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference was observed between 51 000 and 87 000 plants ha–1”
t0“cotton”
Claim · model-written summary
Cotton boll density increased as plant density rose.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- plant densitye0
- Outcome
- number of bolls(boll density)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of bolls(boll density) increased while boll weight decreased as plant density raised”
t0“cotton”
Claim · model-written summary
Cotton boll weight decreased as plant density rose.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- plant densitye0
- Outcome
- boll weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of bolls(boll density) increased while boll weight decreased as plant density raised”
t0“cotton”
Claim · model-written summary
Cotton lint percentage did not change significantly with density in 2013.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- plant densityt0
- Outcome
- lint percentagee0
- Direction
- no significant changese0
- Qualifier
- 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant changes occured in lint percentage in 2013”
t0“plant density on cotton”
Claim · model-written summary
Cotton lint percentage increased with density in 2012.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- plant densitye0
- Outcome
- lint percentagee0
- Direction
- increasede0
- Qualifier
- 2012e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lint percentage in 2013 but increased with plant density in 2012”
t0“cotton”
Claim · model-written summary
Cotton boll numbers in upper nodes and distal fruiting positions rose as density decreased.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- decreasing plant densitye0
- Outcome
- number of bolls in upper nodes and distal fruiting positionse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of bolls in upper nodes and distal fruiting positions, the number of seeds per boll, seed area(SA) and seed vigor index increased with decreasing plant density.”
t0“cotton”
Claim · model-written summary
Cotton seeds per boll, seed area and seed vigor index rose as density decreased.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- decreasing plant densitye0
- Outcome
- number of seeds per boll, seed area(SA) and seed vigor indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of bolls in upper nodes and distal fruiting positions, the number of seeds per boll, seed area(SA) and seed vigor index increased with decreasing plant density.”
t0“cotton”
Claim · model-written summary
Cotton seed area was greater from the locule base to middle than at the apex.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- base to the middlee0
- Outcome
- Seed areae0
- Direction
- greatere0
- Comparator
- apex of a loculee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed area was found to be greater from the base to the middle compared to the apex of a locule.”
t0“cotton”
Claim · model-written summary
Cotton mote frequency increased with plant density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- plant densitye0
- Outcome
- Mote frequency(MF)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mote frequency(MF) increased as plant density increased”
t0“cotton”
Claim · model-written summary
Cotton fiber quality was best at the locule middle regardless of density.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- middle of the loculee0
- Outcome
- fiber qualitye0
- Direction
- beste0
- Qualifier
- regardless of plant densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fiber quality was the best at the middle of the locule regardless of plant density”
t0“cotton”
Claim · model-written summary
The authors suggest adjusting cotton density to produce more seeds and greater seed area as a way to improve lint yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- adjusting plant densitye0
- Outcome
- improve lint yielde0
- Qualifier
- potentially promisinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adjusting plant density to produce more seeds and greater seed area can be a potentially promising alternative to improve lint yield in cotton”
The same questions in other papers
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- positive
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129 papers in the same direction as this paper · 38 in the opposite direction · 3 reporting no difference from an alternative
- no effect
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167 papers more in this group
See all 171 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.