Abstract
Goosegrass is one of the worst agricultural weeds on a worldwide basis. Understanding of its interference impact in crop field will provide useful information for weed control programs. Field experiments were conducted during 2010–2012 to determine the influence of goosegrass density on cotton growth at the weed densities of 0, 0.125, 0.25, 0.5, 1, 2, and 4 plants m−1 of row. Seed cotton yield tended to decrease with the increase in weed density, and goosegrass at a density of 4 plants m−1 of row significantly reduced cotton yields by 20 to 27%. A density of 11.6–19.2 goosegrass plant m−1 of row would result in a 50% cotton yield loss from the maximum yield according to the hyperbolic decay regression model. Boll production was not affected in the early growing season. But boll numbers per plant were reduced about 25% at the density of 4 plants m−1 of row in the late growing season. Both cotton boll weight and seed numbers per boll were significantly reduced (8%) at 4 goosegrass plants m−1 of row. Cotton plant height, stem diameter and sympodial branch number were not affected as much as cotton yields by goosegrass competition. Seed index, lint percentage and lint fiber properties were unaffected by weed competition. Intraspecific competition resulted in density-dependent effects on weed biomass per plant, 142–387 g dry weight by harvest. Goosegrass biomass m−2 tended to increase with increasing weed density as indicated by a quadratic response. The adverse impact of goosegrass on cotton yield identified in this study has indicated the need of effective goosegrass management.
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Claims 11
Claim · model-written summary
Seed cotton yield tended to decrease as weed density increased.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- weed densitye0
- Interactor
- Goosegrasst1weed
- Outcome
- Seed cotton yielde0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed cotton yield tended to decrease with the increase in weed density”
t0“cotton”
t1“Goosegrass”
Claim · model-written summary
Goosegrass at 4 plants per metre of row significantly reduced cotton yield by 20 to 27%.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- goosegrass at a density of 4 plants m−1 of rowe0
- Interactor
- goosegrasse0weed
- Outcome
- cotton yieldse0
- Direction
- reducede0
- Value
- 20 to 27%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“goosegrass at a density of 4 plants m−1 of row significantly reduced cotton yields by 20 to 27%”
Claim · model-written summary
The regression model predicted a 50% cotton yield loss at 11.6–19.2 goosegrass plants per metre of row.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 11.6–19.2 goosegrass plant m−1 of rowe0
- Interactor
- goosegrasse0weed
- Outcome
- cotton yielde0
- Direction
- losse0
- Value
- 50%e0
- Comparator
- maximum yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A density of 11.6–19.2 goosegrass plant m−1 of row would result in a 50% cotton yield loss from the maximum yield according to the hyperbolic decay regression model”
Claim · model-written summary
Boll production was unaffected in the early growing season.
- Taxon
- cottonGossypium hirsutumt0
- Interactor
- Goosegrasst1weed
- Outcome
- Boll productione0
- Direction
- not affectede0
- Qualifier
- early growing seasone0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boll production was not affected in the early growing season”
t0“cotton”
t1“Goosegrass”
Claim · model-written summary
At 4 plants per metre of row, boll numbers per cotton plant fell about 25% late in the growing season.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- density of 4 plants m−1 of rowe0
- Interactor
- Goosegrasst1weed
- Outcome
- boll numbers per plante0
- Direction
- reducede0
- Value
- about 25%e0
- Qualifier
- late growing seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“boll numbers per plant were reduced about 25% at the density of 4 plants m−1 of row in the late growing season”
t0“cotton”
t1“Goosegrass”
Claim · model-written summary
Cotton boll weight and seed numbers per boll were significantly reduced by 8% at 4 goosegrass plants per metre of row.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 4 goosegrass plants m−1 of rowe0
- Interactor
- goosegrasse0weed
- Outcome
- cotton boll weight and seed numbers per bolle0
- Direction
- reducede0
- Value
- 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both cotton boll weight and seed numbers per boll were significantly reduced (8%) at 4 goosegrass plants m−1 of row”
Claim · model-written summary
Cotton height, stem diameter and sympodial branch number were less affected than yield by goosegrass competition.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- goosegrass competitione0
- Interactor
- goosegrasse0weed
- Outcome
- plant height, stem diameter and sympodial branch numbere0
- Direction
- not affected as muche0
- Comparator
- cotton yieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton plant height, stem diameter and sympodial branch number were not affected as much as cotton yields by goosegrass competition”
Claim · model-written summary
Seed index, lint percentage and lint fiber properties were unaffected by weed competition.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- weed competitione0
- Interactor
- Goosegrasst1weed
- Outcome
- Seed index, lint percentage and lint fiber propertiese0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed index, lint percentage and lint fiber properties were unaffected by weed competition”
t0“cotton”
t1“Goosegrass”
Claim · model-written summary
Intraspecific competition produced density-dependent goosegrass biomass per plant of 142–387 g dry weight at harvest.
- Taxon
- Goosegrasst0
- Treatment
- Intraspecific competitione0
- Outcome
- weed biomass per plante0
- Value
- 142–387 g dry weighte0
- Qualifier
- by harveste0
Not reportedDirection
Verbatim
e0“Intraspecific competition resulted in density-dependent effects on weed biomass per plant, 142–387 g dry weight by harvest”
t0“Goosegrass”
Claim · model-written summary
Goosegrass biomass per square metre tended to increase quadratically with weed density.
Verbatim
e0“Goosegrass biomass m−2 tended to increase with increasing weed density as indicated by a quadratic response”
Claim · model-written summary
The authors conclude that effective goosegrass management is needed to protect cotton yield.
- Taxon
- cottonGossypium hirsutume0
- Interactor
- goosegrasse0weed
- Outcome
- effective goosegrass managemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The adverse impact of goosegrass on cotton yield identified in this study has indicated the need of effective goosegrass management”
The same questions in other papers
competition · quality: grain · Gossypium hirsutum (cotton)Results agree
4 papers in the same direction as this paper
- no effect
- negative
- no effect
1 paper more in this group
See all 5 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.