Abstract
By using different planting densities with wide-narrow row(45 cm+ 15 cm)and even row space(30cm), the effects of allocation models on characteristics of photosynthesis and dry matter accumulation in cotton intercropped with jujubewere investigated inXinjiang.The results showed that:(1)The difference of leaf area index(LAI),SPAD and net photosynthesis rate(Pn)in cotton did not reach significant level before full-bloom stage among different allocation models,while itwasopposite afterfull-bloomstage.(2)The change of Pn in cottonwas parabolic,and itwas higherin outer canopy than in lower canopy during the whole growth period. During bud stage, the Pn was relatively high under low density with even row space, and it tended to decrease with the increase of planting density. The Pn reached the peak values atfull-bloomstage,inwhich the highestvalue was 34μmol·m- 2·s- 1 undermiddle densitywith wide-narrowrow.Duringfull-boll stage and boll opening stage,the Pn was the highestunderhigh densitywithwide-narrow row.(3)High planting densitywas beneficial to decrease t0 and increase Vm underwide-narrowrow.The maximum value of Vm underhigh planting densitywas 269.8 kg·d- 1,being 11% and 52.8% higher, respective,than thatunder middle and low planting density.The value of Vm undermiddle and lowplanting densitywith even rowspace was higher than thatwith wide-narrow row, but itwas opposite under high planting density. The value of■ t, t1and t2were se-quenced as:high density middle density lowdensity.Therefore,itwas suitable to plantcotton in high planting density with wide-narrow row in jujube-cotton intercropping system.
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Claims 15
Claim · model-written summary
Before full-bloom stage, LAI, SPAD and net photosynthesis rate of cotton did not differ significantly among allocation models.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- allocation modelse1
- Outcome
- leaf area index(LAI),SPAD and net photosynthesis rate(Pn)e1
- Qualifier
- before full-bloom stagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The difference of leaf area index(LAI),SPAD and net photosynthesis rate(Pn)in cotton did not reach significant level before full-bloom stage among different allocation models”
Claim · model-written summary
After full-bloom stage, LAI, SPAD and net photosynthesis rate of cotton differed significantly among allocation models (the opposite of the earlier result).
- Taxon
- cottonGossypium hirsutume1
- Treatment
- allocation modelse1
- Outcome
- leaf area index(LAI),SPAD and net photosynthesis rate(Pn)e1
- Qualifier
- itwasopposite afterfull-bloomstagee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The difference of leaf area index(LAI),SPAD and net photosynthesis rate(Pn)in cotton did not reach significant level before full-bloom stage among different allocation models”
e2“while itwasopposite afterfull-bloomstage”
Claim · model-written summary
The change of net photosynthesis rate in cotton over the growth period was parabolic.
- Taxon
- cottonGossypium hirsutume3
- Outcome
- change of Pn in cottonwas parabolice3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The change of Pn in cottonwas parabolic”
Claim · model-written summary
Pn of cotton was higher in the outer canopy than in the lower canopy throughout the growth period.
- Taxon
- cottonGossypium hirsutume4
- Organ / stage
- outer canopye4
- Outcome
- Pne4
- Direction
- highere4
- Comparator
- lower canopye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The change of Pn in cottonwas parabolic,and itwas higherin outer canopy than in lower canopy during the whole growth period”
Claim · model-written summary
At bud stage, cotton Pn was relatively high under low density with even row space.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- bud stagee5
- Treatment
- low density with even row spacee5
- Outcome
- Pne5
- Direction
- relatively highe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e5“During bud stage, the Pn was relatively high under low density with even row space”
Claim · model-written summary
At bud stage, cotton Pn tended to decrease as planting density increased.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- bud stagee6
- Treatment
- planting densitye6
- Outcome
- Pne6
- Direction
- decreasee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e6“During bud stage, the Pn was relatively high under low density with even row space, and it tended to decrease with the increase of planting density”
Claim · model-written summary
Cotton Pn peaked at full-bloom stage, with a highest value of 34 umol m-2 s-1 under middle density with wide-narrow row.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- full-bloomstagee7
- Treatment
- middle densitywith wide-narrowrowe7
- Outcome
- Pne7
- Direction
- higheste7
- Value
- 34μmol·m- 2·s- 1e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e7“The Pn reached the peak values atfull-bloomstage,inwhich the highestvalue was 34μmol·m- 2·s- 1 undermiddle densitywith wide-narrowrow”
Claim · model-written summary
At full-boll and boll opening stages, cotton Pn was highest under high density with wide-narrow row.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- full-boll stage and boll opening stagee1
- Treatment
- high densitywithwide-narrow rowe1
- Outcome
- Pne1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“Duringfull-boll stage and boll opening stage,the Pn was the highestunderhigh densitywithwide-narrow row”
Claim · model-written summary
High planting density with wide-narrow row decreased t0 of cotton.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- High planting densitye1
- Outcome
- t0e1
- Direction
- decreasee1
- Qualifier
- underwide-narrowrowe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“High planting densitywas beneficial to decrease t0 and increase Vm underwide-narrowrow”
Claim · model-written summary
High planting density with wide-narrow row increased Vm of cotton.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- High planting densitye1
- Outcome
- Vme1
- Direction
- increasee1
- Qualifier
- underwide-narrowrowe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“High planting densitywas beneficial to decrease t0 and increase Vm underwide-narrowrow”
Claim · model-written summary
The maximum Vm under high planting density was 269.8 kg per day.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high planting densitye1
- Outcome
- Vme1
- Value
- 269.8 kg·d- 1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“Vm underhigh planting densitywas 269.8 kg·d- 1,being 11% and 52.8% higher, respective,than thatunder middle and low planting density”
Claim · model-written summary
Vm under high planting density was 11% higher than under middle planting density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high planting densitye1
- Outcome
- Vme1
- Direction
- highere1
- Value
- 11%e1
- Comparator
- middlee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“Vm underhigh planting densitywas 269.8 kg·d- 1,being 11% and 52.8% higher, respective,than thatunder middle and low planting density”
Claim · model-written summary
Vm under high planting density was 52.8% higher than under low planting density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high planting densitye1
- Outcome
- Vme1
- Direction
- highere1
- Value
- 52.8%e1
- Comparator
- lowe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“Vm underhigh planting densitywas 269.8 kg·d- 1,being 11% and 52.8% higher, respective,than thatunder middle and low planting density”
Claim · model-written summary
Under middle and low planting density, Vm was higher with even row space than with wide-narrow row, but the opposite held under high planting density.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- even rowspacee1
- Outcome
- value of Vme1
- Direction
- highere1
- Qualifier
- itwas opposite under high planting densitye1
- Comparator
- wide-narrow rowe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“The value of Vm undermiddle and lowplanting densitywith even rowspace was higher than thatwith wide-narrow row, but itwas opposite under high planting density”
Claim · model-written summary
The authors conclude it is suitable to plant cotton at high planting density with wide-narrow row in the jujube-cotton intercropping system.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- suitable to plantcotton in high planting density with wide-narrow rowe1
- Setting
- jujube-cotton intercropping systeme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“suitable to plantcotton in high planting density with wide-narrow row in jujube-cotton intercropping system”