Abstract
Field experiment was conducted at Agricultural Farm of the Regional Rainfed Lowland Rice Research Institute, Gerua, Assam during early ahu (summer) season of 2015 and 2016 to study the influence of different weed management practices on yield and yield attributes of wet direct seeded rice sown through drum seeder. The dominant weed flora in the experimental field consisted of sedges Cyperus difformis L., Scirpus incurvatus Roxb., grasses Leptochloa chinensis L., Echinochloa glabrescens, Echinochloa colona L. and broad-leaved weed Ludwigia adscendes L. The composition of grasses, sedges and broad-leaved weeds in weedy check plot at 60 DAS was 15.1, 71.5 and 13.4%, respectively. There was 37.3% reduction in the grain yield of rice due to competition with weeds in the weedy plots. All the weed control treatments significantly reduced weed population, dry matter and increased grain yield of rice compared to weedy check. Hand weeding twice recorded grain yield of 5.64 t ha−1 resulting in 54.5% increase over weedy check. Mechanical weeding followed by one hand weeding recorded reduction in grain yield of 9.2% over hand weeding twice. Application of flucetosulfuron at 25 g ha−1 (5.42 t ha−1), bispyribac sodium at 30 g ha−1 (5.40 t ha−1), azimsulfuron at 35 g ha−1(5.38 t ha−1) and bensulfuron methyl+pretilachlor at 60+600 g ha −1 recorded grain yield on par with the hand weeding twice. Tank mix application of azimsulfuron+bispyribac sodium recorded 2.2% and 1.9% only, increase in grain yield over its single application.
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Claims 10
Claim · model-written summary
Weed competition reduced grain yield 37.3%.
- Taxon
- rice
Oryza sativae0 - Treatment
- competition with weedse0
- Interactor
- weedse0weed
- Outcome
- grain yielde0
- Direction
- reductione0
- Value
- 37.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was 37.3% reduction in the grain yield of rice due to competition with weeds in the weedy plots.”
Claim · model-written summary
Weed controls reduced weed population and dry matter.
- Taxon
- riceOryza sativae0
- Treatment
- weed control treatmentse0
- Interactor
- weede0weed
- Outcome
- weed population, dry mattere0
- Direction
- reducede0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All the weed control treatments significantly reduced weed population, dry matter and increased grain yield of rice compared to weedy check.”
Claim · model-written summary
Weed controls increased rice grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- weed control treatmentse0
- Outcome
- grain yielde0
- Direction
- increasede0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All the weed control treatments significantly reduced weed population, dry matter and increased grain yield of rice compared to weedy check.”
Claim · model-written summary
Twice hand weeding yielded 5.64 t ha−1, 54.5% above weedy check.
- Taxon
- riceOryza sativat0
- Treatment
- Hand weeding twicee0
- Outcome
- grain yielde0
- Direction
- increasee0
- Value
- 5.64 t ha−1e0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hand weeding twice recorded grain yield of 5.64 t ha−1 resulting in 54.5% increase over weedy check.”
t0“rice”
Claim · model-written summary
Mechanical then hand weeding reduced yield 9.2% against twice hand weeding.
- Taxon
- riceOryza sativat0
- Treatment
- Mechanical weeding followed by one hand weedinge0
- Outcome
- grain yielde0
- Direction
- reductione0
- Value
- 9.2%e0
- Comparator
- hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mechanical weeding followed by one hand weeding recorded reduction in grain yield of 9.2% over hand weeding twice.”
t0“rice”
Claim · model-written summary
Flucetosulfuron yielded 5.42 t ha−1 on par with hand weeding twice.
- Taxon
- riceOryza sativat0
- Treatment
- flucetosulfuron at 25 g ha−1e0
- Outcome
- grain yielde0
- Direction
- on pare0
- Value
- 5.42 t ha−1e0
- Comparator
- hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of flucetosulfuron at 25 g ha−1 (5.42 t ha−1), bispyribac sodium at 30 g ha−1 (5.40 t ha−1), azimsulfuron at 35 g ha−1(5.38 t ha−1) and bensulfuron methyl+pretilachlor at 60+600 g ha −1 recorded grain yield on par with the hand weeding twice.”
t0“rice”
Claim · model-written summary
Bispyribac sodium yielded 5.40 t ha−1 on par with hand weeding twice.
- Taxon
- riceOryza sativat0
- Treatment
- bispyribac sodium at 30 g ha−1e0
- Outcome
- grain yielde0
- Direction
- on pare0
- Value
- 5.40 t ha−1e0
- Comparator
- hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of flucetosulfuron at 25 g ha−1 (5.42 t ha−1), bispyribac sodium at 30 g ha−1 (5.40 t ha−1), azimsulfuron at 35 g ha−1(5.38 t ha−1) and bensulfuron methyl+pretilachlor at 60+600 g ha −1 recorded grain yield on par with the hand weeding twice.”
t0“rice”
Claim · model-written summary
Azimsulfuron yielded 5.38 t ha−1 on par with hand weeding twice.
- Taxon
- riceOryza sativat0
- Treatment
- azimsulfuron at 35 g ha−1e0
- Outcome
- grain yielde0
- Direction
- on pare0
- Value
- 5.38 t ha−1e0
- Comparator
- hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of flucetosulfuron at 25 g ha−1 (5.42 t ha−1), bispyribac sodium at 30 g ha−1 (5.40 t ha−1), azimsulfuron at 35 g ha−1(5.38 t ha−1) and bensulfuron methyl+pretilachlor at 60+600 g ha −1 recorded grain yield on par with the hand weeding twice.”
t0“rice”
Claim · model-written summary
The bensulfuron methyl plus pretilachlor treatment yielded on par with twice hand weeding.
- Taxon
- riceOryza sativat0
- Treatment
- bensulfuron methyl+pretilachlor at 60+600 g ha −1e0
- Outcome
- grain yielde0
- Direction
- on pare0
- Comparator
- hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bensulfuron methyl+pretilachlor at 60+600 g ha −1 recorded grain yield on par with the hand weeding twice.”
t0“rice”
Claim · model-written summary
Azimsulfuron plus bispyribac sodium tank mix raised yield 2.2% over single application.
- Taxon
- riceOryza sativat0
- Treatment
- azimsulfuron+bispyribac sodiume0
- Outcome
- grain yielde0
- Direction
- increasee0
- Value
- 2.2%e0
- Comparator
- single applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tank mix application of azimsulfuron+bispyribac sodium recorded 2.2% and 1.9% only, increase in grain yield over its single application.”
t0“rice”
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