Abstract
Field experiments were conducted at Stuttgart, AR, from 1986 to 1988 to determine effects of season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars. This interference reduced straw dry weights of Newbonnet and Lemont by 100 and 130 kg ha –1 per red rice plant, and grain yields by 178 and 272 kg ha –1 per red rice plant, respectively. Grain yield reductions were due to decreases in panicle number and length, and in number of grains per panicle. Ten plants m –2 or more reduced height of Lemont, while 40 plants m −2 were required to reduce height of Newbonnet. Red rice at 10 plants m −2 or more reduced total milled and head rice yields of Lemont, but red rice did not affect these components for Newbonnet. Red rice interfered with rice, even at densities as low as two plants m −2 , and interference was greater in Lemont, a semidwarf cultivar with mature plants 92 cm tall, than in Newbonnet, a conventional cultivar with mature plants 115 cm tall. Red rice produced more panicles m −2 and 31 to 64% greater straw dry weight when grown with Lemont than when grown with Newbonnet because red rice shaded Lemont more than Newbonnet. Red rice plants grew taller as red rice densities increased and also were taller when grown in Newbonnet than when grown in Lemont.
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Claims 12
Claim · model-written summary
Each red rice plant per square metre reduced straw dry weight of Newbonnet and Lemont by 100 and 130 kg per hectare, respectively.
- Taxon
- rice
Oryza sativae0 - Material
- Newbonnet and Lemonte1
- Treatment
- season-long interference of red rice densitiese0
- Interactor
- red ricee1weed
- Outcome
- straw dry weightse1
- Direction
- reducede1
- Value
- 100 and 130 kg ha –1 per red rice plante1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e1“This interference reduced straw dry weights of Newbonnet and Lemont by 100 and 130 kg ha –1 per red rice plant, and grain yields by 178 and 272 kg ha –1 per red rice plant, respectively”
Claim · model-written summary
Each red rice plant per square metre reduced grain yield of Newbonnet and Lemont by 178 and 272 kg per hectare, respectively.
- Taxon
- riceOryza sativae0
- Treatment
- season-long interference of red rice densitiese0
- Interactor
- red ricee1weed
- Outcome
- grain yieldse1
- Direction
- reducede1
- Value
- 178 and 272 kg ha –1 per red rice plante1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e1“This interference reduced straw dry weights of Newbonnet and Lemont by 100 and 130 kg ha –1 per red rice plant, and grain yields by 178 and 272 kg ha –1 per red rice plant, respectively”
Claim · model-written summary
Grain yield reductions from red rice were due to decreases in panicle number and length and in grains per panicle.
- Taxon
- riceOryza sativae0
- Outcome
- Grain yield reductionse2
- Qualifier
- decreases in panicle number and length, and in number of grains per paniclee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e2“Grain yield reductions were due to decreases in panicle number and length, and in number of grains per panicle”
Claim · model-written summary
Ten or more red rice plants per square metre reduced height of Lemont, while 40 were required to reduce height of Newbonnet.
- Taxon
- riceOryza sativae0
- Material
- Lemonte3
- Treatment
- Ten plants m −2 or moree3
- Interactor
- red ricee0weed
- Outcome
- heighte3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e3“Ten plants m −2 or more reduced height of Lemont, while 40 plants m −2 were required to reduce height of Newbonnet”
Claim · model-written summary
Red rice at 10 plants per square metre or more reduced total milled and head rice yields of Lemont.
- Taxon
- riceOryza sativae0
- Material
- Lemonte4
- Treatment
- Red rice at 10 plants m −2 or moree4
- Interactor
- Red ricee4weed
- Outcome
- total milled and head rice yieldse4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e4“Red rice at 10 plants m −2 or more reduced total milled and head rice yields of Lemont, but red rice did not affect these components for Newbonnet”
Claim · model-written summary
Red rice did not affect total milled and head rice yields of Newbonnet.
- Taxon
- riceOryza sativae0
- Material
- Newbonnete4
- Treatment
- Red ricee4
- Interactor
- Red ricee4weed
- Outcome
- total milled and head rice yieldse4
- Direction
- did not affecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e4“Red rice at 10 plants m −2 or more reduced total milled and head rice yields of Lemont, but red rice did not affect these components for Newbonnet”
Claim · model-written summary
Red rice interfered with rice even at densities as low as two plants per square metre.
- Taxon
- riceOryza sativae5
- Interactor
- Red ricee5weed
- Outcome
- interfered with ricee5
- Qualifier
- even at densities as low as two plants m −2e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e5“Red rice interfered with rice, even at densities as low as two plants m −2”
Claim · model-written summary
Red rice interference was greater in Lemont than in Newbonnet.
- Taxon
- riceOryza sativae0
- Material
- Lemonte6
- Interactor
- red ricee0weed
- Outcome
- interferencee6
- Direction
- greatere6
- Comparator
- Newbonnete6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e6“interference was greater in Lemont, a semidwarf cultivar with mature plants 92 cm tall, than in Newbonnet, a conventional cultivar with mature plants 115 cm tall”
Claim · model-written summary
Red rice produced 31 to 64% greater straw dry weight when grown with Lemont than with Newbonnet, because it shaded Lemont more.
- Taxon
- riceOryza sativae0
- Material
- Lemonte7
- Interactor
- red ricee7weed
- Outcome
- straw dry weighte7
- Direction
- greatere7
- Value
- 31 to 64%e7
- Qualifier
- red rice shaded Lemont more than Newbonnete7
- Comparator
- Newbonnete7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e7“Red rice produced more panicles m −2 and 31 to 64% greater straw dry weight when grown with Lemont than when grown with Newbonnet because red rice shaded Lemont more than Newbonnet”
Claim · model-written summary
Red rice produced more panicles per square metre when grown with Lemont than with Newbonnet.
- Taxon
- riceOryza sativae0
- Material
- Lemonte7
- Interactor
- red ricee7weed
- Outcome
- paniclese7
- Direction
- moree7
- Comparator
- Newbonnete7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e7“Red rice produced more panicles m −2 and 31 to 64% greater straw dry weight when grown with Lemont than when grown with Newbonnet because red rice shaded Lemont more than Newbonnet”
Claim · model-written summary
Red rice plants grew taller as red rice density increased.
- Taxon
- riceOryza sativae0
- Treatment
- red rice densitiese1
- Interactor
- Red ricee1weed
- Outcome
- Red rice plantse1
- Direction
- tallere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e1“Red rice plants grew taller as red rice densities increased and also were taller when grown in Newbonnet than when grown in Lemont”
Claim · model-written summary
Red rice plants were taller when grown with Newbonnet than with Lemont.
- Taxon
- riceOryza sativae0
- Material
- Newbonnete1
- Interactor
- Red ricee1weed
- Outcome
- Red rice plantse1
- Direction
- tallere1
- Comparator
- Lemonte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m –2 on ‘Lemont’ and ‘Newbonnet’ rice cultivars”
e1“Red rice plants grew taller as red rice densities increased and also were taller when grown in Newbonnet than when grown in Lemont”
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