Abstract
Laboratory and field experiments were conducted to evaluate the usefulness of Oxalis spp. as allelopathic ground‐cover plants for weed management. Some Oxalis spp. have previously been reported to possess strong allelopathic activities but few studies have been conducted on their activities in fields. This study aimed to investigate allelopathic activities and the possibility of weed suppression in five species of common Oxalis : shamrock oxalis ( Oxalis articulata Savigny), Bowie's woodsorrel ( Oxalis bowiei Lindl.), trefoil ( Oxalis brasiliensis Lodd. ex Knowl. et West.), lucky clover ( Oxalis deppei Lodd. ex Sweet) and Oxalis hirta L. The effects of the leachates from dry leaves and the exudates from living roots of these plant species were tested in laboratory experiments. The leachates from O. articulata , O. bowiei , O. deppei and O. hirta and the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings, but no effect was observed on the seed germination of lettuce. In the field experiment, O. deppei significantly reduced the weed population in July. A significant relationship was observed between the weed population and the percentage ground coverage of Oxalis spp. In contrast to the weed population, a significant relationship was observed between the weed above‐ground biomass and the allelopathic activity of exudates from Oxalis spp.
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Claims 9
Claim · model-written summary
Leachate of O. articulata inhibited lettuce radicle elongation by more than 84%.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- leachatese0
- Interactor
- O. articulata
_Oxalis_articulata_-_Flowers.jpg?width=60)
Oxalis articulatae0other - Outcome
- radicle elongation of lettuce seedlingse0
- Direction
- inhibitione0
- Value
- > 84%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Oxalis_articulata_-_Flowers.jpg?width=500)
Verbatim
e0“The leachates from O. articulata , O. bowiei , O. deppei and O. hirta and the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings”
t0“Oxalis species”
Claim · model-written summary
Leachate of O. bowiei inhibited lettuce radicle elongation by more than 84%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- leachatese0
- Interactor
- O. bowiei
Oxalis bowieie0other - Outcome
- radicle elongation of lettuce seedlingse0
- Direction
- inhibitione0
- Value
- > 84%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leachates from O. articulata , O. bowiei , O. deppei and O. hirta and the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings”
t0“Oxalis species”
Claim · model-written summary
Leachate of O. deppei inhibited lettuce radicle elongation by more than 84%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- leachatese0
- Interactor
- O. deppeie0other
- Outcome
- radicle elongation of lettuce seedlingse0
- Direction
- inhibitione0
- Value
- > 84%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leachates from O. articulata , O. bowiei , O. deppei and O. hirta and the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings”
t0“Oxalis species”
Claim · model-written summary
Leachate of O. hirta inhibited lettuce radicle elongation by more than 84%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- leachatese0
- Interactor
- O. hirta
Oxalis hirtae0other - Outcome
- radicle elongation of lettuce seedlingse0
- Direction
- inhibitione0
- Value
- > 84%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leachates from O. articulata , O. bowiei , O. deppei and O. hirta and the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings”
t0“Oxalis species”
Claim · model-written summary
Root exudates from O. deppei inhibited lettuce radicle elongation by more than 84%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- exudates from O. deppeie0
- Interactor
- O. deppeie0other
- Outcome
- radicle elongation of lettuce seedlingse0
- Direction
- inhibitione0
- Value
- > 84%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings”
Claim · model-written summary
The tested Oxalis leachates and exudates did not affect lettuce germination.
- Taxon
- lettuceLactuca sativae0
- Treatment
- leachatese0
- Outcome
- seed germination of lettucee0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leachates from O. articulata , O. bowiei , O. deppei and O. hirta and the exudates from O. deppei caused > 84% inhibition of the radicle elongation of lettuce seedlings, but no effect was observed on the seed germination of lettuce.”
Claim · model-written summary
O. deppei significantly reduced the field weed population in July.
Not reportedComparator
Verbatim
e0“In the field experiment, O. deppei significantly reduced the weed population in July.”
Claim · model-written summary
Weed population was significantly related to Oxalis ground cover.
OxalisNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant relationship was observed between the weed population and the percentage ground coverage of Oxalis spp.”
Claim · model-written summary
Weed above-ground biomass was significantly related to allelopathic activity of Oxalis exudates.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant relationship was observed between the weed above‐ground biomass and the allelopathic activity of exudates from Oxalis spp.”
The same questions in other papers
allelopathy · growth · Lactuca sativa (garden lettuce)Positive and negative results
6 papers in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- negative
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See all 17 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.