Abstract
The effects of different concentrations of water extracts of A. adenophora leaf litter on the germination and seedling growth of Lolium perenne, Trifolium repens, Galinsoga parviflora and Medicago sativa were determined via laboratory bioassay. The objective of the study was to elucidate allelopathic effects of A. adenophora leaf litter on herbaceous plant in invaded regions. Meanwhile, allelopathic effects of A. adenophora leaf litter on the invaded soil were examined via pot experiments. Results showed that with the exception of L. perenne, there existed significant allelopathic inhibition effects of the water extracts on herbaceous plant seed germination. Inhibition effect increased with increasing concentration of water extract. For the growth of G. parviflora and M. sativa seedling, a significant promotion effect was noted at low water extract concentration. However, herbaceous plant seedling growth (except for L. perenne) was significantly inhibited at high water extract concentration. The effect of water extracts on L. perenne seedling growth was insignificant. Furthermore, pot experiments showed that T. repens seedling growth was significantly inhibited by 50 g·kg-1 leaf litter. T. repens biomass, however, increased by 71.25% with the addition of active carbon (AC). This further testified an obvious allelopathic inhibition effect of leaf litter on herbaceous plant in invaded soils. By leaf litter decomposition and releasing allelochemicals into soils, A. adenophora inhibited seed germination and seedling growth of accompanying plants, created a favorable environment for invasion and expansion.
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Claims 9
Claim · model-written summary
Water extracts of A. adenophora leaf litter significantly inhibited seed germination of the herbaceous plants, except Lolium perenne.
- Taxon
- herbaceous plante1
- Treatment
- water extractse1
- Outcome
- seed germinatione1
- Direction
- inhibitione1
- Qualifier
- with the exception of L. perennee1
Not reportedComparator
Verbatim
e1“with the exception of L. perenne, there existed significant allelopathic inhibition effects of the water extracts on herbaceous plant seed germination”
Claim · model-written summary
The inhibition of seed germination increased with increasing concentration of the A. adenophora litter water extract.
Not reportedTaxonComparator
Verbatim
e1“Inhibition effect increased with increasing concentration of water extract”
Claim · model-written summary
Low concentrations of the water extract significantly promoted seedling growth of Galinsoga parviflora.
- Taxon
- G. parviflora
.jpg?width=60)
Galinsoga parviflorae1 - Treatment
- low water extract concentratione1
- Outcome
- growth of G. parviflora and M. sativa seedlinge1
- Direction
- promotione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“For the growth of G. parviflora and M. sativa seedling, a significant promotion effect was noted at low water extract concentration”
Claim · model-written summary
Low concentrations of the water extract significantly promoted seedling growth of Medicago sativa.
- Taxon
- M. sativa
Medicago sativae1 - Treatment
- low water extract concentratione1
- Outcome
- growth of G. parviflora and M. sativa seedlinge1
- Direction
- promotione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“For the growth of G. parviflora and M. sativa seedling, a significant promotion effect was noted at low water extract concentration”
Claim · model-written summary
High concentrations of the water extract significantly inhibited seedling growth of the herbaceous plants, except Lolium perenne.
- Taxon
- herbaceous plante1
- Treatment
- high water extract concentratione1
- Outcome
- seedling growthe1
- Direction
- inhibitede1
- Qualifier
- except for L. perennee1
Not reportedComparator
Verbatim
e1“herbaceous plant seedling growth (except for L. perenne) was significantly inhibited at high water extract concentration”
Claim · model-written summary
Water extracts had an insignificant effect on seedling growth of Lolium perenne.
- Taxon
- L. perenne
Lolium perennee1 - Treatment
- water extractse1
- Outcome
- seedling growthe1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effect of water extracts on L. perenne seedling growth was insignificant”
Claim · model-written summary
In pot experiments, 50 g/kg A. adenophora leaf litter significantly inhibited Trifolium repens seedling growth.
- Taxon
- T. repens
Trifolium repense1 - Treatment
- 50 g·kg-1 leaf littere1
- Outcome
- seedling growthe1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“T. repens seedling growth was significantly inhibited by 50 g·kg-1 leaf litter”
Claim · model-written summary
T. repens biomass increased by 71.25% when active carbon was added to the leaf litter soil.
- Taxon
- T. repensTrifolium repense1
- Treatment
- addition of active carbon (AC)e1
- Outcome
- biomasse1
- Direction
- increasede1
- Value
- 71.25%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“T. repens biomass, however, increased by 71.25% with the addition of active carbon (AC)”
Claim · model-written summary
Through leaf litter decomposition and release of allelochemicals into soil, A. adenophora inhibited seed germination and seedling growth of accompanying plants.
- Taxon
- accompanying plantse1
- Interactor
- A. adenophora
_2.jpg?width=60)
Ageratina adenophorae1weed - Outcome
- seed germination and seedling growthe1
- Qualifier
- leaf litter decomposition and releasing allelochemicals into soilse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_2.jpg?width=500)
Verbatim
e1“By leaf litter decomposition and releasing allelochemicals into soils, A. adenophora inhibited seed germination and seedling growth of accompanying plants”
The same questions in other papers
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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.