Abstract
A field experiment was conducted at the Norman E. Borlaug Crop Research Centre, Govind Ballabh Pant Uni- versity of Agriculture and Technology, Pantnagar, Uttarakhand during the rainy (kharif) seasons of 2011 and 2012, to study the effect of crop-establishment methods and weed-management options on weed dynamics and produc- tivity of rice (Oryza sativa L.). The lowest density and dry matter of total weeds 60 days after sowing/days after transplanting was recorded under transplanted rice. This treatment resulted in the highest number of effective tillers/m2 (218.36) and grain yield (4.01 t/ha) of rice. Among the weed-management options, application of bispyribac sodium 20 g/ha at 15 DAS/DAT followed by 1 hand-weeding (HW) at 35 DAS/DAT being at par with the application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds, followed by 1 HW at 35 DAS/DAT recorded the minimum population and dry-matter of total weeds and the highest weed control efficiency. This treatment resulted in significantly higher number of panicles/m2, grains/panicle and grain yield than rest of the treatments. Crop-es- tablishment methods and weed-management options interacted significantly; and significantly higher grain yield was recorded with transplanted rice in combination with the application of bispyribac sodium 20 g/ha at 15 DAS/ DAT followed by 1 HW at 35 DAS/DAT or penoxsulam 22.5 g/ha at 23-leaf stage of weeds followed by (fb) 1 HW at 35 DAS/DAT. The highest net returns ( 1,380/ha) and benefit: cost ratio (1.09) were recorded with application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds fb 1 HW at 35 DAS/DAT.
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Claims 8
Claim · model-written summary
Transplanted rice had the lowest weed density and dry matter.
- Taxon
- rice
Oryza sativae0 - Treatment
- transplanted ricee0
- Interactor
- weedse0weed
- Outcome
- density and dry matter of total weedse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest density and dry matter of total weeds 60 days after sowing/days after transplanting was recorded under transplanted rice.”
Claim · model-written summary
Transplanted rice had the highest effective tiller count of 218.36 per m2.
- Taxon
- riceOryza sativae0
- Treatment
- transplanted ricee1
- Outcome
- number of effective tillers/m2e0
- Direction
- higheste0
- Value
- 218.36e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment resulted in the highest number of effective tillers/m2 (218.36) and grain yield (4.01 t/ha) of rice.”
e1“under transplanted rice.”
Claim · model-written summary
Transplanted rice had the highest grain yield of 4.01 t/ha.
- Taxon
- riceOryza sativae0
- Treatment
- transplanted ricee1
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 4.01 t/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment resulted in the highest number of effective tillers/m2 (218.36) and grain yield (4.01 t/ha) of rice.”
e1“under transplanted rice.”
Claim · model-written summary
Bispyribac sodium followed by hand-weeding minimized weed population and dry matter and maximized weed control efficiency, at par with penoxsulam followed by hand-weeding.
- Taxon
- riceOryza sativat0
- Treatment
- application of bispyribac sodium 20 g/ha at 15 DAS/DAT followed by 1 hand-weeding (HW) at 35 DAS/DATe0
- Interactor
- weedse0weed
- Outcome
- population and dry-matter of total weeds and the highest weed control efficiencye0
- Direction
- minimume0
- Comparator
- application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds, followed by 1 HW at 35 DAS/DATe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of bispyribac sodium 20 g/ha at 15 DAS/DAT followed by 1 hand-weeding (HW) at 35 DAS/DAT being at par with the application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds, followed by 1 HW at 35 DAS/DAT recorded the minimum population and dry-matter of total weeds and the highest weed control efficiency.”
t0“rice”
Claim · model-written summary
Bispyribac sodium followed by hand-weeding produced more panicles, grains per panicle and grain yield than other treatments.
- Taxon
- riceOryza sativat0
- Treatment
- application of bispyribac sodium 20 g/ha at 15 DAS/DAT followed by 1 hand-weeding (HW) at 35 DAS/DATe1
- Outcome
- number of panicles/m2, grains/panicle and grain yielde0
- Direction
- highere0
- Comparator
- rest of the treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment resulted in significantly higher number of panicles/m2, grains/panicle and grain yield than rest of the treatments.”
e1“application of bispyribac sodium 20 g/ha at 15 DAS/DAT followed by 1 hand-weeding (HW) at 35 DAS/DAT”
t0“rice”
Claim · model-written summary
Establishment method and weed-management option interacted significantly for grain yield.
- Taxon
- riceOryza sativat0
- Treatment
- transplanted ricee0
- Outcome
- grain yielde0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crop-es- tablishment methods and weed-management options interacted significantly; and significantly higher grain yield was recorded with transplanted rice in combination with the application of bispyribac sodium 20 g/ha at 15 DAS/ DAT followed by 1 HW at 35 DAS/DAT or penoxsulam 22.5 g/ha at 23-leaf stage of weeds followed by (fb) 1 HW at 35 DAS/DAT.”
t0“rice”
Claim · model-written summary
Penoxsulam followed by hand-weeding had the highest net returns of 1,380/ha.
- Taxon
- riceOryza sativat0
- Treatment
- application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds fb 1 HW at 35 DAS/DATe0
- Outcome
- net returnse0
- Direction
- higheste0
- Value
- 1,380/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest net returns ( 1,380/ha) and benefit: cost ratio (1.09) were recorded with application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds fb 1 HW at 35 DAS/DAT.”
t0“rice”
Claim · model-written summary
Penoxsulam followed by hand-weeding had the highest benefit: cost ratio of 1.09.
- Taxon
- riceOryza sativat0
- Treatment
- application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds fb 1 HW at 35 DAS/DATe0
- Outcome
- benefit: cost ratioe0
- Direction
- higheste0
- Value
- 1.09e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest net returns ( 1,380/ha) and benefit: cost ratio (1.09) were recorded with application of penoxsulam 22.5 g/ha at 23-leaf stage of weeds fb 1 HW at 35 DAS/DAT.”
t0“rice”
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