Abstract
Chemical topping with 1,1-dimethylpiperidinium chloride (DPC) has been considered a promising measure to inhibit apical dominance in cotton (Gossypium hirsutum L.). However, knowledge of the plant growth and canopy development of cotton under chemical topping with DPC remains limited, and the effect of this practice on lint yield and defoliation is unclear. A two-year (2019–2020) field experiment was conducted with two varieties, Xinluzao 60 (L60, DPC-insensitive) and Jinken1402 (JK1402, DPC-sensitive), and four topping methods, manual topping (MT), no topping (NT), DPC+ (fortified DPC) and DPC. We found that the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+ but were enhanced by 0.9–4.7% in L60 and 6.7–11.8% in JK1402 relative to those under MT and NT, with no significant difference in fiber quality. This was mainly due to the change in plant growth and canopy structure. In particular, compared with MT, application of DPC shortened the upper branches and extended the duration of the leaf area index peak. Moreover, in the late reproductive period, DPC application increased the number of upper leaves and reduced diffuse noninterceptance. Notably, the light transmittance rate (LLR) of JK1402 treated with DPC was higher than that of MT in the middle and lower parts of the canopy. Furthermore, there was positive correlation between LLR and defoliation rate. Therefore, chemical topping with DPC provided an effective alternative for manual topping.
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Claims 13
Claim · model-written summary
Lint yield of cotton variety L60 treated with DPC was equivalent to that treated with DPC+.
- Taxon
- cotton
Gossypium hirsutume0 - Material
- L60e2
- Treatment
- DPCe2
- Outcome
- lint yieldse2
- Direction
- equivalente2
- Comparator
- DPC+e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e2“the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+”
Claim · model-written summary
Lint yield of cotton variety JK1402 treated with DPC was equivalent to that treated with DPC+.
- Taxon
- cottonGossypium hirsutume0
- Material
- JK1402e2
- Treatment
- DPCe2
- Outcome
- lint yieldse2
- Direction
- equivalente2
- Comparator
- DPC+e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e2“the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+”
Claim · model-written summary
Lint yield of cotton variety L60 under DPC was enhanced by 0.9–4.7% relative to manual topping and no topping.
- Taxon
- cottonGossypium hirsutume0
- Material
- L60e2
- Treatment
- DPCe2
- Outcome
- lint yieldse2
- Direction
- enhancede3
- Value
- 0.9–4.7%e3
- Comparator
- MT and NTe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e2“the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+”
e3“were enhanced by 0.9–4.7% in L60 and 6.7–11.8% in JK1402 relative to those under MT and NT”
Claim · model-written summary
Lint yield of cotton variety JK1402 under DPC was enhanced by 6.7–11.8% relative to manual topping and no topping.
- Taxon
- cottonGossypium hirsutume0
- Material
- JK1402e2
- Treatment
- DPCe2
- Outcome
- lint yieldse2
- Direction
- enhancede3
- Value
- 6.7–11.8%e3
- Comparator
- MT and NTe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e2“the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+”
e3“were enhanced by 0.9–4.7% in L60 and 6.7–11.8% in JK1402 relative to those under MT and NT”
Claim · model-written summary
Under DPC, cotton fiber quality showed no significant difference.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- DPCe2
- Outcome
- fiber qualitye4
- Direction
- no significant differencee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e2“the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+”
e4“with no significant difference in fiber quality”
Claim · model-written summary
The lint yield gain from DPC is mainly explained by the change in plant growth and canopy structure in cotton.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- lint yieldse2
- Qualifier
- change in plant growth and canopy structuree5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e2“the lint yields of L60 and JK1402 treated with DPC were equivalent to those of L60 and JK1402 treated with DPC+”
e5“This was mainly due to the change in plant growth and canopy structure”
Claim · model-written summary
Compared with manual topping, DPC shortened the upper branches of cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- DPCe6
- Outcome
- upper branchese6
- Direction
- shortenede6
- Comparator
- MTe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e6“compared with MT, application of DPC shortened the upper branches and extended the duration of the leaf area index peak”
Claim · model-written summary
Compared with manual topping, DPC extended the duration of the leaf area index peak in cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- DPCe6
- Outcome
- duration of the leaf area index peake6
- Direction
- extendede6
- Comparator
- MTe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e6“compared with MT, application of DPC shortened the upper branches and extended the duration of the leaf area index peak”
Claim · model-written summary
DPC application increased the number of upper leaves of cotton in the late reproductive period.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- late reproductive periode7
- Treatment
- DPC applicatione7
- Outcome
- number of upper leavese7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e7“in the late reproductive period, DPC application increased the number of upper leaves and reduced diffuse noninterceptance”
Claim · model-written summary
DPC application reduced diffuse noninterception in the cotton canopy in the late reproductive period.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- late reproductive periode7
- Treatment
- DPC applicatione7
- Outcome
- diffuse noninterceptancee7
- Direction
- reducede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e7“in the late reproductive period, DPC application increased the number of upper leaves and reduced diffuse noninterceptance”
Claim · model-written summary
The light transmittance rate of JK1402 treated with DPC was higher than under manual topping in the middle and lower canopy.
- Taxon
- cottonGossypium hirsutume0
- Material
- JK1402e1
- Organ / stage
- middle and lower parts of the canopye1
- Treatment
- DPCe1
- Outcome
- light transmittance rate (LLR)e1
- Direction
- highere1
- Comparator
- MTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“the light transmittance rate (LLR) of JK1402 treated with DPC was higher than that of MT in the middle and lower parts of the canopy”
Claim · model-written summary
In cotton, light transmittance rate (LLR) is positively correlated with defoliation rate.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- defoliation ratee1
- Direction
- positive correlatione1
- Comparator
- LLRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“there was positive correlation between LLR and defoliation rate”
Claim · model-written summary
Chemical topping with DPC is an effective alternative to manual topping in cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- chemical topping with DPCe1
- Outcome
- an effective alternative for manual toppinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton (Gossypium hirsutum L.)”
e1“chemical topping with DPC provided an effective alternative for manual topping”
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See all 78 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.