Abstract
We investigated the effects of planting density on biomass and nitrogen accumulation of cotton,and the relationships with yield and fiber quality.A field experiment was conducted using cotton cultivars Liaomian 19 and NuCTON 33B in Liaoyang City,Liaoning Province(latitude 41°26'N,longitude 123°14'E),in 2007 and 2008.The general pattern of cotton biomass and nitrogen accumulation followed a logistic curve;planting density was able to change biomass and nitrogen accumulation,and subsequently influence yield and fiber quality.The beginning and end of the high speed accumulation stage for nitrogen was about 10 days earlier than that for biomass;indicating that nitrogen and biomass are not synchronously accumulated.Fiber yield and quality were highest at a planting density of 9.75×104 plants·hm-2 for both cultivars.This density also gave the highest speed of accumulation of cotton dry matter and nitrogen,the longest duration of acceleration period,and the highest yield.A reduction in fiber yield would be caused by planting with excessive density.
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Claims 9
Claim · model-written summary
Cotton biomass and nitrogen accumulation followed logistic curves.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- biomass and nitrogen accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The general pattern of cotton biomass and nitrogen accumulation followed a logistic curve”
Claim · model-written summary
Planting density changed cotton biomass and nitrogen accumulation.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- planting densitye0
- Outcome
- biomass and nitrogen accumulatione0
- Direction
- changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting density was able to change biomass and nitrogen accumulation”
e1“planting density on biomass and nitrogen accumulation of cotton”
Claim · model-written summary
Planting density influenced cotton yield and fiber quality.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- planting densitye0
- Outcome
- yield and fiber qualitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting density was able to change biomass and nitrogen accumulation,and subsequently influence yield and fiber quality”
e1“nitrogen accumulation of cotton,and the relationships”
Claim · model-written summary
Rapid nitrogen accumulation began and ended about 10 days earlier than rapid biomass accumulation.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- high speed accumulation stage for nitrogene0
- Direction
- earliere0
- Value
- about 10 dayse0
- Comparator
- biomasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The beginning and end of the high speed accumulation stage for nitrogen was about 10 days earlier than that for biomass”
e1“cotton biomass and nitrogen accumulation”
Claim · model-written summary
Both cultivars had highest fiber yield at 9.75×104 plants·hm-2.
- Taxon
- cottonGossypium hirsutume1
- Material
- Liaomian 19 and NuCTON 33Be1
- Treatment
- planting density of 9.75×104 plants·hm-2e0
- Outcome
- Fiber yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fiber yield and quality were highest at a planting density of 9.75×104 plants·hm-2 for both cultivars”
e1“cotton cultivars Liaomian 19 and NuCTON 33B”
Claim · model-written summary
Both cultivars had highest fiber quality at 9.75×104 plants·hm-2.
- Taxon
- cottonGossypium hirsutume1
- Material
- Liaomian 19 and NuCTON 33Be1
- Treatment
- planting density of 9.75×104 plants·hm-2e0
- Outcome
- qualitye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fiber yield and quality were highest at a planting density of 9.75×104 plants·hm-2 for both cultivars”
e1“cotton cultivars Liaomian 19 and NuCTON 33B”
Claim · model-written summary
That density produced the highest dry matter and nitrogen accumulation speeds.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- planting density of 9.75×104 plants·hm-2e1
- Outcome
- speed of accumulation of cotton dry matter and nitrogene0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This density also gave the highest speed of accumulation of cotton dry matter and nitrogen”
e1“planting density of 9.75×104 plants·hm-2”
Claim · model-written summary
That density produced the longest acceleration period.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- planting density of 9.75×104 plants·hm-2e2
- Outcome
- duration of acceleration periode0
- Direction
- longeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the longest duration of acceleration period”
e1“This density also gave the highest speed of accumulation of cotton dry matter and nitrogen”
e2“planting density of 9.75×104 plants·hm-2”
Claim · model-written summary
Excessive planting density reduced fiber yield.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- planting with excessive densitye0
- Outcome
- fiber yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A reduction in fiber yield would be caused by planting with excessive density”
e1“cotton cultivars Liaomian 19 and NuCTON 33B”
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33 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- negative
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See all 69 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.