Abstract
Direct seeding of rice is an emerging technology. However, direct seeded rice culture in the main field is hindered by enormous weed infestation and it lacks judicious fertilizer management. So, experiments were conducted during dry seasons of 2010 and 2012 with three fertilizer packages and four weed control measures. Rice seed was sown in the field using drum seeder in wet soil. The results revealed that weed density and weed biomass were strongly influenced by weed control methods and fertilizer rates. Weed density was higher in unweeded plots with 140:36:43 kg NPK ha-1. Among the species Echinichloa crusgalli (L.) P. Beauv. was the dominant species. Three hand weeding controlled maximum weeds. Uses of herbicide for controlling weeds were above 80 and 70% effective. Strong negative correlation was recorded between grain yield and weed density. Herbicide with one hand weeding and BRRI weeder in combination with 160:46:53 kg NPK ha-1 produced about 81- 104% higher grain yield than no weeding. Weed free plot produced 112% higher yield with 160:46:53 kg NPK ha-1. Besides, herbicide with one hand weeding and BRRI weeder treated plot produced similar yield irrespective of fertilizer doses. The strong positive and linear relationship was found in case of yield and yield components. Herbicide with one hand weeding and 120:26:33 kg NPK ha-1 gave higher net return (1145 $/ha). The benefit cost ratio was also higher in herbicide based weed management with reduced rate of fertilizer. Direct seeded culture using herbicide with one hand weeding and 120:26:33 kg NPK ha-1 could be an option for reducing production cost in dry season along with satisfactory grain yield.Bangladesh Rice j. 2016, 20(1): 65-75
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Claims 13
Claim · model-written summary
Weed density and biomass responded strongly to weed control and fertilizer rates.
- Taxon
- rice
Oryza sativat0 - Treatment
- weed control methods and fertilizer ratese0
- Interactor
- weede0weed
- Outcome
- weed density and weed biomasse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed density and weed biomass were strongly influenced by weed control methods and fertilizer rates.”
t0“Rice”
Claim · model-written summary
Unweeded plots with 140:36:43 kg NPK had higher weed density.
- Taxon
- riceOryza sativat0
- Treatment
- 140:36:43 kg NPK ha-1e0
- Interactor
- Weede0weed
- Outcome
- Weed densitye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed density was higher in unweeded plots with 140:36:43 kg NPK ha-1.”
t0“Rice”
Claim · model-written summary
Echinichloa crusgalli was the dominant weed species.
- Taxon
- riceOryza sativat0
- Interactor
- Echinichloa crusgalli (L.) P. Beauv.e0weed
- Outcome
- dominant speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the species Echinichloa crusgalli (L.) P. Beauv. was the dominant species.”
t0“Rice”
Claim · model-written summary
Three hand weedings controlled the most weeds.
- Taxon
- riceOryza sativat0
- Treatment
- Three hand weedinge0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three hand weeding controlled maximum weeds.”
t0“Rice”
Claim · model-written summary
Herbicides controlled weeds with over 80 and 70% effectiveness.
- Taxon
- riceOryza sativat0
- Treatment
- herbicidee0
- Interactor
- weedse0weed
- Outcome
- controlling weedse0
- Direction
- effectivee0
- Value
- 80 and 70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uses of herbicide for controlling weeds were above 80 and 70% effective.”
t0“Rice”
Claim · model-written summary
Rice grain yield correlated negatively with weed density.
- Taxon
- riceOryza sativat0
- Interactor
- weede0weed
- Outcome
- grain yielde0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strong negative correlation was recorded between grain yield and weed density.”
t0“Rice”
Claim · model-written summary
Herbicide with one hand weeding and 160:46:53 kg NPK yielded 81- 104% more grain than no weeding.
- Taxon
- riceOryza sativat0
- Treatment
- Herbicide with one hand weeding and BRRI weeder in combination with 160:46:53 kg NPK ha-1e0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 81- 104%e0
- Comparator
- no weedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicide with one hand weeding and BRRI weeder in combination with 160:46:53 kg NPK ha-1 produced about 81- 104% higher grain yield than no weeding.”
t0“Rice”
Claim · model-written summary
Weed free plots with 160:46:53 kg NPK yielded 112% more.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed free plot produced 112% higher yield with 160:46:53 kg NPK ha-1.”
t0“Rice”
Claim · model-written summary
Yield was similar across fertilizer doses with herbicide and one hand weeding and BRRI weeder.
- Taxon
- riceOryza sativat0
- Treatment
- herbicide with one hand weeding and BRRI weedere0
- Outcome
- yielde0
- Direction
- similare0
- Comparator
- fertilizer dosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“herbicide with one hand weeding and BRRI weeder treated plot produced similar yield irrespective of fertilizer doses.”
t0“Rice”
Claim · model-written summary
Yield and yield components had a strong positive linear relationship.
- Taxon
- riceOryza sativat0
- Organ / stage
- yield componentse0
- Outcome
- yielde0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strong positive and linear relationship was found in case of yield and yield components.”
t0“Rice”
Claim · model-written summary
Herbicide with hand weeding and 120:26:33 kg NPK gave higher net return of 1145 $/ha.
- Taxon
- riceOryza sativat0
- Treatment
- Herbicide with one hand weeding and 120:26:33 kg NPK ha-1e0
- Outcome
- net returne0
- Direction
- highere0
- Value
- 1145 $/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicide with one hand weeding and 120:26:33 kg NPK ha-1 gave higher net return (1145 $/ha).”
t0“Rice”
Claim · model-written summary
Herbicide weed management with reduced fertilizer had a higher benefit cost ratio.
- Taxon
- riceOryza sativat0
- Treatment
- herbicide based weed management with reduced rate of fertilizere0
- Outcome
- benefit cost ratioe0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The benefit cost ratio was also higher in herbicide based weed management with reduced rate of fertilizer.”
t0“Rice”
Claim · model-written summary
Herbicide with one hand weeding and reduced fertilizer is proposed for lower costs and satisfactory yield.
- Taxon
- riceOryza sativat0
- Treatment
- herbicide with one hand weeding and 120:26:33 kg NPK ha-1e0
- Outcome
- reducing production cost in dry season along with satisfactory grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Direct seeded culture using herbicide with one hand weeding and 120:26:33 kg NPK ha-1 could be an option for reducing production cost in dry season along with satisfactory grain yield.”
t0“Rice”
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