Abstract
Volunteer barley competition can significantly decrease the productivity of tannin‐free faba bean ( Vicia faba L.) and narrow‐leafed lupin ( Lupinus angustifolius L.). Field experiments were conducted in north central Alberta, Canada, between 2004 and 2006 to establish the effects of volunteer barley competition on these two crops. Faba bean and lupin were grown with three densities (0, 25, and 50 plants m −2 ) of volunteer barley ( Hordeum vulgare L.). Leaf area index (LAI), light interception, canopy height, and aboveground dry matter (DM) accumulation were measured at 21‐d intervals between 37 and 120 d after planting (DAP). At 79 DAP, 25 barley plants m −2 reduced faba bean LAI by 41% and lupin LAI by 64% compared with treatments without volunteer barley. Volunteer barley was shorter than the faba bean canopy but taller than the lupin canopy. As a result, volunteer barley did not affect the amount of light available at the top of the faba bean canopy. Due to the height advantage of volunteer barley over lupin, the amount of light available at the top of the lupin canopy was reduced to 51%, 100 DAP. A volunteer barley density of 25 plants m −2 reduced lupin DM by 68% and faba bean DM by 38%. The poor competitive ability of lupin may be attributed to slow early season LAI development, short stature, and poor light interception, which indicate the need for early and effective volunteer barley control in lupin crops.
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Claims 10
Claim · model-written summary
At 79 days after planting, 25 volunteer barley plants per square metre reduced faba bean leaf area index by 41% versus no barley.
- Taxon
- faba bean
Vicia fabae0 - Treatment
- 25 barley plants m −2e0
- Interactor
- barley
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Hordeum vulgaree0weed - Outcome
- LAIe0
- Direction
- reducede0
- Value
- 41%e0
- Qualifier
- At 79 DAPe0
- Comparator
- treatments without volunteer barleye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“At 79 DAP, 25 barley plants m −2 reduced faba bean LAI by 41% and lupin LAI by 64% compared with treatments without volunteer barley.”
Claim · model-written summary
At 79 days after planting, 25 volunteer barley plants per square metre reduced lupin leaf area index by 64% versus no barley.
- Treatment
- 25 barley plants m −2e0
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- LAIe0
- Direction
- reducede0
- Value
- 64%e0
- Qualifier
- At 79 DAPe0
- Comparator
- treatments without volunteer barleye0
LupinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 79 DAP, 25 barley plants m −2 reduced faba bean LAI by 41% and lupin LAI by 64% compared with treatments without volunteer barley.”
Claim · model-written summary
Volunteer barley was shorter than the faba bean canopy.
- Taxon
- faba beanVicia fabae0
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- canopye0
- Direction
- shortere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Volunteer barley was shorter than the faba bean canopy but taller than the lupin canopy.”
Claim · model-written summary
Volunteer barley was taller than the lupin canopy.
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- canopye0
- Direction
- tallere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Volunteer barley was shorter than the faba bean canopy but taller than the lupin canopy.”
Claim · model-written summary
Volunteer barley did not affect light availability at the top of the faba bean canopy.
- Taxon
- faba beanVicia fabae0
- Treatment
- volunteer barleye0
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- amount of light available at the top of the faba bean canopye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“volunteer barley did not affect the amount of light available at the top of the faba bean canopy.”
Claim · model-written summary
With volunteer barley, light available at the top of the lupin canopy fell to 51% at 100 days after planting.
- Treatment
- volunteer barleye0
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- amount of light available at the top of the lupin canopye0
- Direction
- reducede0
- Value
- 51%e0
- Qualifier
- 100 DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Due to the height advantage of volunteer barley over lupin, the amount of light available at the top of the lupin canopy was reduced to 51%, 100 DAP.”
Claim · model-written summary
A barley density of 25 plants per square metre reduced lupin dry matter by 68%.
- Treatment
- volunteer barley density of 25 plants m −2e0
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- DMe0
- Direction
- reducede0
- Value
- 68%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A volunteer barley density of 25 plants m −2 reduced lupin DM by 68% and faba bean DM by 38%.”
Claim · model-written summary
A barley density of 25 plants per square metre reduced faba bean dry matter by 38%.
- Taxon
- faba beanVicia fabae0
- Treatment
- volunteer barley density of 25 plants m −2e0
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- DMe0
- Direction
- reducede0
- Value
- 38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A volunteer barley density of 25 plants m −2 reduced lupin DM by 68% and faba bean DM by 38%.”
Claim · model-written summary
The authors attribute poor lupin competitive ability to slow early leaf area development, short stature and poor light interception.
- Outcome
- poor competitive abilitye0
- Qualifier
- slow early season LAI development, short stature, and poor light interceptione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The poor competitive ability of lupin may be attributed to slow early season LAI development, short stature, and poor light interception”
Claim · model-written summary
The authors call for early and effective control of volunteer barley in lupin crops.
- Interactor
- barleyHordeum vulgaree0weed
- Outcome
- early and effective volunteer barley controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the need for early and effective volunteer barley control in lupin crops.”
The same questions in other papers
Hordeum vulgare · growth · LupinusPositive and negative results
1 in the opposite direction
- positive
Hordeum vulgare · growth · Vicia faba (faba bean)Positive and negative results
1 in the opposite direction
- positive
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.