Abstract
High Resolution Image Download MS PowerPoint Slide Direct drum seeding has emerged as a viable and alternate substitute to the current transplanted rice to address constraints of labor and water scarcity as well as rising cultivation costs. However, heavy weed infestation is the main biological factor leading to immense yield loss, which requires immediate attention. Therefore, adoption of efficient weed management practice is critical for the success and widespread adoption of direct seeded rice. In this regard, an experiment was laid out at the Faculty of Agriculture, Wadura, SKUAST of Kashmir, India, in Kharif seasons of 2018 and 2019 to assess the efficiency of direct seeded rice (DSR) under two sowing dates (D 1: 10th May and D 2: 3rd June) and six weed management strategies (W 1: weedy check (untreated check), W 2: four mechanized conoweedings at 15, 30, 45, and 60 DAS (days after sowing), equivalent to weed free (four conoweedings, equivalent to weed free), W 3: bensulfuron-methyl + pretilachlor @ 60 and 600 g a.i. ha –1 as pre-emergence (BSM + pretilachlor, PE), W 4: oxyfluorfen @ 750 g a.i. ha –1 as pre-emergence (oxyfluorfen, PE), W 5: bensulfuron-methyl + pretilachlor @ 60 and 600 g a.i. ha –1 as pre-emergence followed by 2,4-D @ 0.75 kg a.i. ha –1 as post-emergence (30–35 DAS) (BSM + pretilachlor PE fb 2,4-D PoE), and W 6: oxyfluorfen @ 750 g a.i. ha –1 as pre-emergence followed by 2,4-D @ 0.75 kg a.i. ha –1 as post-emergence (30–35 DAS) (oxyfluorfen PE fb 2,4-D PoE) on growth characteristics, productivity, weed infestation, and nutrient dynamics. The pooled results showed that 10th May sowing recorded significantly higher values of growth characteristics viz. plant height, dry matter production, tiller count, and yield characteristics, including panicle weight, panicle length, filled grains per panicle, and test weight, as compared to delayed sowing (3rd June). Earlier sowing (10th May) produced significantly higher grain yield (7.33 t ha –1 ) and straw yield (8.99 t ha –1 ) when compared to the delayed sowing (3rd June) which produced a grain yield of 6.08 t ha –1 and straw yield of 7.93 t ha –1 . Among weed management strategies, four mechanized conoweeding at 15, 30, 45, and 60 DAS resulted in enhanced growth, yield characteristics, and yield but was statistically similar to bensulfuron-methyl (BSM) + pretilachlor PE fb 2,4-D post-emergence (PoE). Delayed sowing (3rd June; D 2 ) recorded significantly higher weed density and dry-weed biomass as compared to earlier sowing (10th May; D 1 ). Among the herbicides tested, sequential application of BSM + pretilachlor PE fb 2,4-D PoE proved an efficient weed management practice with a significantly reduced population and dry weight of weeds. Therefore, it was concluded that 10th May sowing with four mechanized conoweedings or sequential application of BSM + pretilachlor PE fb 2,4-D PoE is promising for improving productivity and efficient weed control in direct drum seeded rice under temperate Kashmir conditions.
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Claims 11
Claim · model-written summary
May sowing raised rice plant height, dry matter production and tiller count relative to June sowing.
- Taxon
- Rice
Oryza sativat0 - Treatment
- 10th May sowinge0
- Outcome
- plant height, dry matter production, tiller counte0
- Direction
- highere0
- Comparator
- delayed sowing (3rd June)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10th May sowing recorded significantly higher values of growth characteristics viz. plant height, dry matter production, tiller count, and yield characteristics, including panicle weight, panicle length, filled grains per panicle, and test weight, as compared to delayed sowing (3rd June)”
t0“Rice”
Claim · model-written summary
May sowing raised panicle weight, panicle length and filled grains per panicle.
- Taxon
- RiceOryza sativat0
- Treatment
- 10th May sowinge0
- Outcome
- panicle weight, panicle length, filled grains per paniclee0
- Direction
- highere0
- Comparator
- delayed sowing (3rd June)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10th May sowing recorded significantly higher values of growth characteristics viz. plant height, dry matter production, tiller count, and yield characteristics, including panicle weight, panicle length, filled grains per panicle, and test weight, as compared to delayed sowing (3rd June)”
t0“Rice”
Claim · model-written summary
May sowing raised test weight.
- Taxon
- RiceOryza sativat0
- Treatment
- 10th May sowinge0
- Outcome
- test weighte0
- Direction
- highere0
- Comparator
- delayed sowing (3rd June)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10th May sowing recorded significantly higher values of growth characteristics viz. plant height, dry matter production, tiller count, and yield characteristics, including panicle weight, panicle length, filled grains per panicle, and test weight, as compared to delayed sowing (3rd June)”
t0“Rice”
Claim · model-written summary
May sowing produced higher grain yield than June sowing.
- Taxon
- RiceOryza sativat0
- Treatment
- Earlier sowing (10th May)e0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 7.33 t ha –1e0
- Qualifier
- 6.08 t ha –1e0
- Comparator
- delayed sowing (3rd June)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earlier sowing (10th May) produced significantly higher grain yield (7.33 t ha –1 ) and straw yield (8.99 t ha –1 ) when compared to the delayed sowing (3rd June) which produced a grain yield of 6.08 t ha –1 and straw yield of 7.93 t ha –1”
t0“Rice”
Claim · model-written summary
May sowing produced higher straw yield than June sowing.
- Taxon
- RiceOryza sativat0
- Treatment
- Earlier sowing (10th May)e0
- Outcome
- straw yielde0
- Direction
- highere0
- Value
- 8.99 t ha –1e0
- Qualifier
- 7.93 t ha –1e0
- Comparator
- delayed sowing (3rd June)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earlier sowing (10th May) produced significantly higher grain yield (7.33 t ha –1 ) and straw yield (8.99 t ha –1 ) when compared to the delayed sowing (3rd June) which produced a grain yield of 6.08 t ha –1 and straw yield of 7.93 t ha –1”
t0“Rice”
Claim · model-written summary
Four conoweedings enhanced rice growth.
- Taxon
- RiceOryza sativat0
- Treatment
- four mechanized conoweeding at 15, 30, 45, and 60 DASe0
- Outcome
- growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four mechanized conoweeding at 15, 30, 45, and 60 DAS resulted in enhanced growth, yield characteristics, and yield but was statistically similar to bensulfuron-methyl (BSM) + pretilachlor PE fb 2,4-D post-emergence (PoE)”
t0“Rice”
Claim · model-written summary
Four conoweedings enhanced yield characteristics and yield.
- Taxon
- RiceOryza sativat0
- Treatment
- four mechanized conoweeding at 15, 30, 45, and 60 DASe0
- Outcome
- yield characteristics, and yielde0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four mechanized conoweeding at 15, 30, 45, and 60 DAS resulted in enhanced growth, yield characteristics, and yield but was statistically similar to bensulfuron-methyl (BSM) + pretilachlor PE fb 2,4-D post-emergence (PoE)”
t0“Rice”
Claim · model-written summary
Four conoweedings and sequential herbicides gave statistically similar performance.
- Taxon
- RiceOryza sativat0
- Treatment
- four mechanized conoweeding at 15, 30, 45, and 60 DASe0
- Outcome
- growth, yield characteristics, and yielde0
- Direction
- similare0
- Comparator
- bensulfuron-methyl (BSM) + pretilachlor PE fb 2,4-D post-emergence (PoE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four mechanized conoweeding at 15, 30, 45, and 60 DAS resulted in enhanced growth, yield characteristics, and yield but was statistically similar to bensulfuron-methyl (BSM) + pretilachlor PE fb 2,4-D post-emergence (PoE)”
t0“Rice”
Claim · model-written summary
June sowing increased weed density and weed biomass relative to May sowing.
- Taxon
- RiceOryza sativat0
- Treatment
- Delayed sowing (3rd June; D 2 )e0
- Interactor
- weede0weed
- Outcome
- weed density and dry-weed biomasse0
- Direction
- highere0
- Comparator
- earlier sowing (10th May; D 1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delayed sowing (3rd June; D 2 ) recorded significantly higher weed density and dry-weed biomass as compared to earlier sowing (10th May; D 1 )”
t0“Rice”
Claim · model-written summary
Sequential herbicides reduced weed population and dry weight.
- Taxon
- RiceOryza sativat0
- Treatment
- sequential application of BSM + pretilachlor PE fb 2,4-D PoEe0
- Interactor
- weedse0weed
- Outcome
- population and dry weight of weedse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sequential application of BSM + pretilachlor PE fb 2,4-D PoE proved an efficient weed management practice with a significantly reduced population and dry weight of weeds”
t0“Rice”
Claim · model-written summary
The authors recommend May sowing with four conoweedings or sequential herbicides for productivity and weed control.
- Taxon
- RiceOryza sativat0
- Outcome
- improving productivity and efficient weed controle0
- Setting
- temperate Kashmir conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10th May sowing with four mechanized conoweedings or sequential application of BSM + pretilachlor PE fb 2,4-D PoE is promising for improving productivity and efficient weed control in direct drum seeded rice under temperate Kashmir conditions”
t0“Rice”
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