Abstract
The biology of purple nutsedge was studied by growing it alone and in competition with 12 and 24 rice plants in a pot experiment. Compared with the weedy plants grown alone, competition from rice reduced purple nutsedge leaf number, shoot number, tuber production rate, and leaf biomass. At 10 wk after planting, interference from 12 and 24 rice plants reduced purple nutsedge leaf area by 79 and 86%, respectively, compared with weedy plants grown without rice interference. On the same date, purple nutsedge aboveground shoot biomass was 26.8 g plant −1 without interference, whereas in interference with 12 and 24 rice plants, purple nutsedge produced aboveground biomass of 4.8 and 2.2 g plant −1 , respectively. A total of 95 tubers plant −1 were produced by purple nutsedge when grown alone. Growth with 12 and 24 rice plants reduced tuber production to 33 and 17 tubers plant −1 , respectively. Without interference, purple nutsedge produced 40 g plant −1 of total biomass of tuber plus root plus rhizome, whereas in interference with 12 and 24 rice plants, purple nutsedge produced 14 and 5 g plant −1 of total belowground biomass, respectively.
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Claims 10
Claim · model-written summary
Rice competition reduced purple nutsedge leaf number, shoot number and tuber production rate.
- Taxon
- Rice
Oryza sativat0 - Treatment
- competition from ricee0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedge leaf number, shoot number, tuber production ratee0
- Direction
- reducede0
- Comparator
- weedy plants grown alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the weedy plants grown alone, competition from rice reduced purple nutsedge leaf number, shoot number, tuber production rate, and leaf biomass.”
t0“Rice”
Claim · model-written summary
Rice competition reduced purple nutsedge leaf biomass.
- Taxon
- RiceOryza sativat0
- Treatment
- competition from ricee0
- Interactor
- purple nutsedgee0weed
- Outcome
- leaf biomasse0
- Direction
- reducede0
- Comparator
- weedy plants grown alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the weedy plants grown alone, competition from rice reduced purple nutsedge leaf number, shoot number, tuber production rate, and leaf biomass.”
t0“Rice”
Claim · model-written summary
Interference by 12 rice plants reduced nutsedge leaf area by 79%.
- Taxon
- rice plantsOryza sativae0
- Treatment
- 12 and 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedge leaf areae0
- Direction
- reducede0
- Value
- 79e0
- Comparator
- weedy plants grown without rice interferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 wk after planting, interference from 12 and 24 rice plants reduced purple nutsedge leaf area by 79 and 86%, respectively, compared with weedy plants grown without rice interference.”
Claim · model-written summary
Interference by 24 rice plants reduced nutsedge leaf area by 86%.
- Taxon
- RiceOryza sativat0
- Treatment
- 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedge leaf areae0
- Direction
- reducede0
- Value
- 86%e0
- Comparator
- weedy plants grown without rice interferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 wk after planting, interference from 12 and 24 rice plants reduced purple nutsedge leaf area by 79 and 86%, respectively, compared with weedy plants grown without rice interference.”
t0“Rice”
Claim · model-written summary
With 12 rice plants, purple nutsedge shoot biomass was 4.8 g per plant versus 26.8 without interference.
- Taxon
- RiceOryza sativat0
- Treatment
- 12 and 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedge aboveground shoot biomasse0
- Direction
- lowerinferrede0
- Value
- 4.8e0
- Comparator
- without interferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“purple nutsedge aboveground shoot biomass was 26.8 g plant −1 without interference, whereas in interference with 12 and 24 rice plants, purple nutsedge produced aboveground biomass of 4.8 and 2.2 g plant −1 , respectively.”
t0“Rice”
Claim · model-written summary
With 24 rice plants, purple nutsedge shoot biomass was 2.2 g per plant versus 26.8 without interference.
- Taxon
- RiceOryza sativat0
- Treatment
- 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedge aboveground shoot biomasse0
- Direction
- lowerinferrede0
- Value
- 2.2 g plant −1e0
- Comparator
- without interferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“purple nutsedge aboveground shoot biomass was 26.8 g plant −1 without interference, whereas in interference with 12 and 24 rice plants, purple nutsedge produced aboveground biomass of 4.8 and 2.2 g plant −1 , respectively.”
t0“Rice”
Claim · model-written summary
With 12 rice plants, nutsedge tuber production fell to 33 per plant versus 95 alone.
- Taxon
- RiceOryza sativat0
- Treatment
- 12 and 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedgee0
- Direction
- reducede0
- Value
- 33e0
- Comparator
- grown alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 95 tubers plant −1 were produced by purple nutsedge when grown alone. Growth with 12 and 24 rice plants reduced tuber production to 33 and 17 tubers plant −1 , respectively.”
t0“Rice”
Claim · model-written summary
With 24 rice plants, nutsedge tuber production fell to 17 per plant versus 95 alone.
- Taxon
- RiceOryza sativat0
- Treatment
- 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- tuber productione0
- Direction
- reducede0
- Value
- 17 tubers plant −1e0
- Comparator
- grown alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 95 tubers plant −1 were produced by purple nutsedge when grown alone. Growth with 12 and 24 rice plants reduced tuber production to 33 and 17 tubers plant −1 , respectively.”
t0“Rice”
Claim · model-written summary
With 12 rice plants, nutsedge belowground biomass was 14 g per plant versus 40 alone.
- Taxon
- RiceOryza sativat0
- Treatment
- 12 and 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedgee0
- Direction
- lowerinferrede0
- Value
- 14e0
- Comparator
- Without interferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Without interference, purple nutsedge produced 40 g plant −1 of total biomass of tuber plus root plus rhizome, whereas in interference with 12 and 24 rice plants, purple nutsedge produced 14 and 5 g plant −1 of total belowground biomass, respectively.”
t0“Rice”
Claim · model-written summary
With 24 rice plants, nutsedge belowground biomass was 5 g per plant versus 40 alone.
- Taxon
- RiceOryza sativat0
- Treatment
- 24 rice plantse0
- Interactor
- purple nutsedgee0weed
- Outcome
- purple nutsedgee0
- Direction
- lowerinferrede0
- Value
- 5 g plant −1e0
- Comparator
- Without interferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Without interference, purple nutsedge produced 40 g plant −1 of total biomass of tuber plus root plus rhizome, whereas in interference with 12 and 24 rice plants, purple nutsedge produced 14 and 5 g plant −1 of total belowground biomass, respectively.”
t0“Rice”
The same questions in other papers
competition · yield · Oryza sativa (rice)Results differ
3 papers in the same direction as this paper · 42 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
43 papers more in this group
See all 47 papers →competition · growth · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- no effect
8 papers more in this group
See all 12 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.