Abstract
The use of rice ( Oryza sativa L.) allelopathy for weed control is a new technology in agronomy. A laboratory bioassay using water extracts was conducted to determine the allelopathic potential of rice body parts on seed germination and growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi) and to determine rapid and simple methods for selecting allelopathic rice varieties using genetic characters and phenotypes. In this study, the highest inhibition rate was for ‘Danganeuibangju’ (76.9%) in straw extracts, ‘Dongobyeo’ (74.1%) in the leaves, and ‘Baek’ (31.7%) in the hull. ‘CUBA 65‐v‐58’ (38.6%) had the highest inhibition as a whole (average of leaves, straw, and hull), and there was a higher average inhibitory effect for straw extracts (21.6%) than for hulls (8.2%) and leaves (12.4%). With regard to classification by phenotypic and genetic characteristics, these groups showed a higher inhibitory effect in domestic varieties (14.2%), middle‐maturing varieties (15.3%), varieties of hull color (15.1%), and varieties of awn color (16.0%). These results suggest that rice body parts may be a source of natural herbicides and that it is necessary to develop acceptable selection standards. There may also be genetic variation in rice varieties for their allelopathic potential on barnyardgrass. In the future, it might be possible to develop rice varieties with high allelopathic potential.
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Claims 13
Claim · model-written summary
Straw water extract of the rice variety Danganeuibangju gave the highest inhibition rate on barnyardgrass (76.9%).
- Taxon
- rice
Oryza sativae0 - Material
- Danganeuibangjue1
- Treatment
- straw extractse1
- Interactor
- barnyardgrass
Echinochloa crus-gallie2weed - Outcome
- inhibition ratee1
- Direction
- higheste1
- Value
- 76.9%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e1“the highest inhibition rate was for ‘Danganeuibangju’ (76.9%) in straw extracts, ‘Dongobyeo’ (74.1%) in the leaves, and ‘Baek’ (31.7%) in the hull”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
Claim · model-written summary
Leaf water extract of the rice variety Dongobyeo gave the highest inhibition rate on barnyardgrass (74.1%).
- Taxon
- riceOryza sativae0
- Material
- Dongobyeoe1
- Treatment
- leavese1
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibition ratee1
- Direction
- higheste1
- Value
- 74.1%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e1“the highest inhibition rate was for ‘Danganeuibangju’ (76.9%) in straw extracts, ‘Dongobyeo’ (74.1%) in the leaves, and ‘Baek’ (31.7%) in the hull”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
Claim · model-written summary
Hull water extract of the rice variety Baek gave the highest inhibition rate on barnyardgrass (31.7%).
- Taxon
- riceOryza sativae0
- Material
- Baeke1
- Treatment
- hulle1
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibition ratee1
- Direction
- higheste1
- Value
- 31.7%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e1“the highest inhibition rate was for ‘Danganeuibangju’ (76.9%) in straw extracts, ‘Dongobyeo’ (74.1%) in the leaves, and ‘Baek’ (31.7%) in the hull”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
Claim · model-written summary
The rice variety CUBA 65‐v‐58 had the highest average inhibition on barnyardgrass across leaf, straw and hull extracts (38.6%).
- Taxon
- riceOryza sativae0
- Material
- CUBA 65‐v‐58e3
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibitione3
- Direction
- higheste3
- Value
- 38.6%e3
- Qualifier
- as a whole (average of leaves, straw, and hull)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e3“‘CUBA 65‐v‐58’ (38.6%) had the highest inhibition as a whole (average of leaves, straw, and hull)”
Claim · model-written summary
Straw extracts had a higher average inhibitory effect on barnyardgrass than hull extracts (21.6% against 8.2%).
- Taxon
- riceOryza sativae0
- Treatment
- straw extractse4
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- average inhibitory effecte4
- Direction
- highere4
- Value
- 21.6%e4
- Qualifier
- 8.2%e4
- Comparator
- hullse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e4“there was a higher average inhibitory effect for straw extracts (21.6%) than for hulls (8.2%) and leaves (12.4%)”
Claim · model-written summary
Straw extracts had a higher average inhibitory effect on barnyardgrass than leaf extracts (21.6% against 12.4%).
- Taxon
- riceOryza sativae0
- Treatment
- straw extractse4
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- average inhibitory effecte4
- Direction
- highere4
- Value
- 21.6%e4
- Qualifier
- 12.4%e4
- Comparator
- leavese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e4“there was a higher average inhibitory effect for straw extracts (21.6%) than for hulls (8.2%) and leaves (12.4%)”
Claim · model-written summary
Domestic rice varieties showed a higher inhibitory effect on barnyardgrass (14.2%).
- Taxon
- riceOryza sativae0
- Material
- domestic varietiese5
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibitory effecte5
- Direction
- highere5
- Value
- 14.2%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e5“these groups showed a higher inhibitory effect in domestic varieties (14.2%), middle‐maturing varieties (15.3%), varieties of hull color (15.1%), and varieties of awn color (16.0%)”
Claim · model-written summary
Middle-maturing rice varieties showed a higher inhibitory effect on barnyardgrass (15.3%).
- Taxon
- riceOryza sativae0
- Material
- middle‐maturing varietiese5
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibitory effecte5
- Direction
- highere5
- Value
- 15.3%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e5“these groups showed a higher inhibitory effect in domestic varieties (14.2%), middle‐maturing varieties (15.3%), varieties of hull color (15.1%), and varieties of awn color (16.0%)”
Claim · model-written summary
Rice varieties with hull color showed a higher inhibitory effect on barnyardgrass (15.1%).
- Taxon
- riceOryza sativae0
- Material
- varieties of hull colore5
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibitory effecte5
- Direction
- highere5
- Value
- 15.1%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e5“these groups showed a higher inhibitory effect in domestic varieties (14.2%), middle‐maturing varieties (15.3%), varieties of hull color (15.1%), and varieties of awn color (16.0%)”
Claim · model-written summary
Rice varieties with awn color showed a higher inhibitory effect on barnyardgrass (16.0%).
- Taxon
- riceOryza sativae0
- Material
- varieties of awn colore5
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- inhibitory effecte5
- Direction
- highere5
- Value
- 16.0%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e2“growth of barnyardgrass ( Echinochloa crus‐galli P. Beauv. var. oryzicola Ohwi)”
e5“these groups showed a higher inhibitory effect in domestic varieties (14.2%), middle‐maturing varieties (15.3%), varieties of hull color (15.1%), and varieties of awn color (16.0%)”
Claim · model-written summary
Rice body parts may be a source of natural herbicides.
- Taxon
- riceOryza sativae0
- Outcome
- source of natural herbicidese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e6“rice body parts may be a source of natural herbicides”
Claim · model-written summary
The authors consider it necessary to develop acceptable selection standards for allelopathic rice.
- Taxon
- riceOryza sativae0
- Outcome
- develop acceptable selection standardse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e7“it is necessary to develop acceptable selection standards”
Claim · model-written summary
There may be genetic variation in rice varieties for allelopathic potential on barnyardgrass.
- Taxon
- riceOryza sativae0
- Material
- rice varietiese7
- Interactor
- barnyardgrassEchinochloa crus-gallie7weed
- Outcome
- allelopathic potentiale7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rice ( Oryza sativa L.)”
e7“There may also be genetic variation in rice varieties for their allelopathic potential on barnyardgrass”
The same questions in other papers
botanical · Echinochloa crus-galli · Oryza sativa (rice)Positive and negative results
24 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
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24 papers more in this group
See all 28 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.