Abstract
A field study was undertaken at Agronomic Research Station, Chalakudy, Kerala for developing suitable water and weed management strategies for aerobic rice. The trial was laid out with three levels of irrigation in the main plot [irrigation at 10, 20 and 30 mm CPE (cumulative pan evaporation)] and five weed management treatments in the subplot (pre emergent herbicide oxadiargyl followed by hand weeding, 2,4- D sodium salt or bispyribac sodium at 20 days after sowing (DAS), hand weeding at 20 and 40 DAS and unweeded control). Irrigation at 10 mm CPE increased crop growth, but reduced weed growth. Less irrigation (30 mm CPE) favoured the growth and density of grasses and broad leaf weeds and produced the highest weed dry matter. Sedge population was more in frequently irrigated plot (10 mm CPE). Moisture stress in 30 mm CPE resulted in 44 per cent yield loss. Weed competition caused 64 per cent yield reduction. Both water and weeds together accounted for 85 per cent yield reduction. Irrigation at 10 mm CPE recorded the highest grain yield and weed control efficiency, but lowest water productivity. Among weed management practices, hand weeding at 20 and 40 DAS recorded the highest grain yield, weed control efficiency and water productivity. However, application of oxadiargyl followed by bispyribac sodium resulted in better water productivity and recorded highest B:C ratio.
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Claims 13
Claim · model-written summary
Irrigation at 10 mm CPE increased rice growth.
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Irrigation at 10 mm CPE increased crop growth, but reduced weed growth.”
Claim · model-written summary
Irrigation at 10 mm CPE reduced weed growth.
- Taxon
- aerobic ricet0
- Treatment
- Irrigation at 10 mm CPEe0
- Interactor
- weede0weed
- Outcome
- weed growthe0
- Direction
- reducede0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Irrigation at 10 mm CPE increased crop growth, but reduced weed growth.”
Claim · model-written summary
Less irrigation at 30 mm CPE favoured grass and broad leaf weed growth and density.
- Taxon
- aerobic ricet0
- Treatment
- Less irrigation (30 mm CPE)e0
- Interactor
- grasses and broad leaf weedse0weed
- Outcome
- growth and density of grasses and broad leaf weedse0
- Direction
- favourede0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Less irrigation (30 mm CPE) favoured the growth and density of grasses and broad leaf weeds and produced the highest weed dry matter.”
Claim · model-written summary
Less irrigation at 30 mm CPE produced the highest weed dry matter.
- Taxon
- aerobic ricet0
- Treatment
- Less irrigation (30 mm CPE)e0
- Interactor
- weede0weed
- Outcome
- weed dry mattere0
- Direction
- higheste0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Less irrigation (30 mm CPE) favoured the growth and density of grasses and broad leaf weeds and produced the highest weed dry matter.”
Claim · model-written summary
Sedge population was greater under frequent irrigation at 10 mm CPE.
Verbatim
t0“aerobic rice”
e0“Sedge population was more in frequently irrigated plot (10 mm CPE).”
Claim · model-written summary
Moisture stress at 30 mm CPE caused 44 per cent yield loss.
- Taxon
- aerobic ricet0
- Treatment
- Moisture stress in 30 mm CPEe0
- Outcome
- yield losse0
- Direction
- losse0
- Value
- 44 per cente0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Moisture stress in 30 mm CPE resulted in 44 per cent yield loss.”
Claim · model-written summary
Weed competition caused a 64 per cent rice yield reduction.
Verbatim
t0“aerobic rice”
e0“Weed competition caused 64 per cent yield reduction.”
Claim · model-written summary
Water and weeds together accounted for 85 per cent rice yield reduction.
Verbatim
t0“aerobic rice”
e0“Both water and weeds together accounted for 85 per cent yield reduction.”
Claim · model-written summary
Irrigation at 10 mm CPE gave the highest grain yield and weed control efficiency.
- Taxon
- aerobic ricet0
- Treatment
- Irrigation at 10 mm CPEe0
- Outcome
- grain yield and weed control efficiencye0
- Direction
- higheste0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Irrigation at 10 mm CPE recorded the highest grain yield and weed control efficiency, but lowest water productivity.”
Claim · model-written summary
Irrigation at 10 mm CPE gave the lowest water productivity.
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“Irrigation at 10 mm CPE recorded the highest grain yield and weed control efficiency, but lowest water productivity.”
Claim · model-written summary
Hand weeding at 20 and 40 DAS gave the highest grain yield, weed control efficiency and water productivity.
- Taxon
- aerobic ricet0
- Treatment
- hand weeding at 20 and 40 DASe0
- Outcome
- grain yield, weed control efficiency and water productivitye0
- Direction
- higheste0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“hand weeding at 20 and 40 DAS recorded the highest grain yield, weed control efficiency and water productivity.”
Claim · model-written summary
Oxadiargyl followed by bispyribac sodium gave better water productivity.
- Taxon
- aerobic ricet0
- Treatment
- application of oxadiargyl followed by bispyribac sodiume0
- Outcome
- water productivitye0
- Direction
- bettere0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“application of oxadiargyl followed by bispyribac sodium resulted in better water productivity and recorded highest B:C ratio.”
Claim · model-written summary
Oxadiargyl followed by bispyribac sodium gave the highest B:C ratio.
- Taxon
- aerobic ricet0
- Treatment
- application of oxadiargyl followed by bispyribac sodiume0
- Outcome
- B:C ratioe0
- Direction
- higheste0
Not reportedComparator
Verbatim
t0“aerobic rice”
e0“application of oxadiargyl followed by bispyribac sodium resulted in better water productivity and recorded highest B:C ratio.”
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See all 380 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.