Abstract
【Objective】 The experiment was conducted to investigate the inter-specific competitive interaction between Ageratina adenophora (Sprengel) and Setaria sphacelata (Schum) at different densities, and to explore the methods of controlling the invasive weed A. adenophora displaced by S. sphacelata.【Method】 The above two perennial species were grown for 2 years in monoculture and mixture on an experimental densities gradient. The above-and blow-ground biomass of the two species were measured and the growth response and relative competitive ability were evaluated.【Result】 The total biomass, relative yield and competitive balance index of S. sphacelata were significantly higher than those of A. adenophora, the relative yield total was significantly lower than 1. The relationships mentioned above become more obvious with decreasing of experimental plant community densities. The total biomass of A. adenophora at the densities of 20, 45 and 175 plants/m2 in mixture decreased by 33.0%, 38.5% and 70.1% compared to those in monoculture, respectively. However, the total biomass of S. sphacelata at the same density between monoculture and mixture showed no significant difference. The ratios of root mass vs shoot mass of S. sphacelata in mixture were significantly lower than those in monoculture. However, the ratios of root mass vs shoot mass of A. adenophora in the mixture were significantly higher than those in monoculture【.Conclusion】There was a significant mutual antagonism between A. adenophora and S. sphacelata compared to A. adenophora, the relative competitive ability of S. sphacelata was higher, which decreased heavily the growth of A. adenophora mainly by shoot competition. It will be a promising strategy for replacement control of A. adenophora by using S. sphacelata as a competitor.
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Claims 11
Claim · model-written summary
Setaria sphacelata had higher total biomass, relative yield and competitive balance index than Ageratina adenophora.
- Taxon
- S. sphacelata
Setaria sphacelatae0 - Interactor
- A. adenophora
_2.jpg?width=60)
Ageratina adenophorae0weed - Outcome
- total biomass, relative yield and competitive balance indexe0
- Direction
- highere0
- Comparator
- A. adenophorae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_2.jpg?width=500)
Verbatim
e0“The total biomass, relative yield and competitive balance index of S. sphacelata were significantly higher than those of A. adenophora”
Claim · model-written summary
Relative yield total was below one.
Not reportedTaxon
Verbatim
e0“the relative yield total was significantly lower than 1”
Claim · model-written summary
The competitive relationships were more pronounced at lower community densities.
- Outcome
- relationships mentioned abovee0
- Direction
- more obviouse0
- Setting
- experimental plant community densitiese0
Not reportedTaxon
Verbatim
e0“The relationships mentioned above become more obvious with decreasing of experimental plant community densities”
Claim · model-written summary
Ageratina biomass in mixture fell 33.0% at 20 plants/m2 versus monoculture.
- Taxon
- A. adenophoraAgeratina adenophorae0
- Treatment
- mixturee0
- Outcome
- total biomasse0
- Direction
- decreasede0
- Value
- 33.0%e0
- Qualifier
- 20e0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total biomass of A. adenophora at the densities of 20, 45 and 175 plants/m2 in mixture decreased by 33.0%, 38.5% and 70.1% compared to those in monoculture”
Claim · model-written summary
Ageratina biomass in mixture fell 38.5% at 45 plants/m2 versus monoculture.
- Taxon
- A. adenophoraAgeratina adenophorae0
- Treatment
- mixturee0
- Outcome
- total biomasse0
- Direction
- decreasede0
- Value
- 38.5%e0
- Qualifier
- 45e0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total biomass of A. adenophora at the densities of 20, 45 and 175 plants/m2 in mixture decreased by 33.0%, 38.5% and 70.1% compared to those in monoculture”
Claim · model-written summary
Ageratina biomass in mixture fell 70.1% at 175 plants/m2 versus monoculture.
- Taxon
- A. adenophoraAgeratina adenophorae0
- Treatment
- mixturee0
- Outcome
- total biomasse0
- Direction
- decreasede0
- Value
- 70.1%e0
- Qualifier
- 175e0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total biomass of A. adenophora at the densities of 20, 45 and 175 plants/m2 in mixture decreased by 33.0%, 38.5% and 70.1% compared to those in monoculture”
Claim · model-written summary
Setaria biomass did not differ significantly between mixture and monoculture.
- Taxon
- S. sphacelataSetaria sphacelatae0
- Treatment
- mixturee0
- Outcome
- total biomasse0
- Direction
- no significant differencee0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total biomass of S. sphacelata at the same density between monoculture and mixture showed no significant difference”
Claim · model-written summary
Setaria root-to-shoot mass ratio was lower in mixture than monoculture.
- Taxon
- S. sphacelataSetaria sphacelatae0
- Treatment
- mixturee0
- Outcome
- ratios of root mass vs shoot masse0
- Direction
- lowere0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratios of root mass vs shoot mass of S. sphacelata in mixture were significantly lower than those in monoculture”
Claim · model-written summary
Ageratina root-to-shoot mass ratio was higher in mixture than monoculture.
- Taxon
- A. adenophoraAgeratina adenophorae0
- Treatment
- mixturee0
- Outcome
- ratios of root mass vs shoot masse0
- Direction
- highere0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ratios of root mass vs shoot mass of A. adenophora in the mixture were significantly higher than those in monoculture”
Claim · model-written summary
The authors attributed suppression of Ageratina growth mainly to shoot competition from Setaria.
- Taxon
- A. adenophoraAgeratina adenophorae0
- Interactor
- S. sphacelataSetaria sphacelatae0weed
- Outcome
- growth of A. adenophorae0
- Qualifier
- shoot competitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative competitive ability of S. sphacelata was higher, which decreased heavily the growth of A. adenophora mainly by shoot competition”
Claim · model-written summary
The authors proposed Setaria as a competitor for replacement control of Ageratina.
- Taxon
- A. adenophoraAgeratina adenophorae0
- Interactor
- S. sphacelataSetaria sphacelatae0weed
- Outcome
- replacement control of A. adenophorae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It will be a promising strategy for replacement control of A. adenophora by using S. sphacelata as a competitor”