Abstract
Effect of different weed management practices and plant growth-promoting rhizobacteria (PGPR) were evaluated in Jorhat (Assam) on weed dynamics, crop growth and yield in direct-seeded upland rice during 2018 and 2019. Results revealed that density and dry weight of weeds were the lowest with Pseudomonas fluorescens among PGPR treatments. The growth and yield attributing characters were significantly improved due to P fluorescens contributing to the highest grain and straw yield of rice. Single application of pretilachlor pre-emergence 0.75 kg/ha or application of pretilachlor pre-emergence 0.75 kg/ha followed by one hand weeding at 30 DAS resulted in least density and dry weight of weeds at initial stages of crop growth. The lowest values were recorded in three hand weedings done at 15, 30 and 45 DAS. Better growth and yield attributing characters of rice with three hand weedings at 15, 30 and 45 DAS resulted in the highest grain and straw yields. Combination of P fluorescens with either three hand weedings at 15, 30 and 45 DAS or pretilachlor pre-emergence 0.75 kg/ha followed by one hand weeding at 30 DAS was found to be superior with grain and straw yields along with similar trend in gross and net returns. However, the benefit: cost ratio was the highest in the combination of P fluorescens with pretilachlor pre-emergence at 0.75 kg/ha followed by one hand weeding at 30 DAS.
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Claims 9
Claim · model-written summary
Pseudomonas fluorescens produced the lowest weed density and dry weight among PGPR treatments.
- Taxon
- rice
Oryza sativat0 - Treatment
- Pseudomonas fluorescense0
- Interactor
- Pseudomonas fluorescens
.JPG?width=60)
Pseudomonas fluorescense0symbiont - Outcome
- density and dry weight of weedse0
- Direction
- loweste0
- Comparator
- PGPR treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“density and dry weight of weeds were the lowest with Pseudomonas fluorescens among PGPR treatments”
t0“rice”
Claim · model-written summary
P. fluorescens significantly improved rice growth and yield attributes and gave the highest grain and straw yield.
- Taxon
- riceOryza sativae0
- Treatment
- P fluorescense0
- Interactor
- P fluorescensPseudomonas fluorescense0symbiont
- Outcome
- growth and yield attributing characterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth and yield attributing characters were significantly improved due to P fluorescens contributing to the highest grain and straw yield of rice”
Claim · model-written summary
P. fluorescens gave the highest rice grain and straw yield.
- Taxon
- riceOryza sativae0
- Treatment
- P fluorescense0
- Interactor
- P fluorescensPseudomonas fluorescense0symbiont
- Outcome
- grain and straw yield of ricee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P fluorescens contributing to the highest grain and straw yield of rice”
Claim · model-written summary
Pretilachlor alone or followed by hand weeding gave the least early weed density and dry weight.
- Taxon
- riceOryza sativat0
- Treatment
- pretilachlor pre-emergence 0.75 kg/hae0
- Outcome
- density and dry weight of weedse0
- Direction
- leaste0
- Qualifier
- at initial stages of crop growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single application of pretilachlor pre-emergence 0.75 kg/ha or application of pretilachlor pre-emergence 0.75 kg/ha followed by one hand weeding at 30 DAS resulted in least density and dry weight of weeds at initial stages of crop growth”
t0“rice”
Claim · model-written summary
Three hand weedings gave the lowest weed density and dry weight.
- Taxon
- riceOryza sativat0
- Treatment
- three hand weedings done at 15, 30 and 45 DASe0
- Outcome
- density and dry weight of weedse1
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest values were recorded in three hand weedings done at 15, 30 and 45 DAS”
e1“density and dry weight of weeds were the lowest”
t0“rice”
Claim · model-written summary
Three hand weedings improved rice growth and yield attributes and produced the highest grain and straw yields.
- Taxon
- riceOryza sativae0
- Treatment
- three hand weedings at 15, 30 and 45 DASe0
- Outcome
- growth and yield attributing characters of ricee0
- Direction
- Bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Better growth and yield attributing characters of rice with three hand weedings at 15, 30 and 45 DAS resulted in the highest grain and straw yields”
Claim · model-written summary
Three hand weedings gave the highest rice grain and straw yields.
- Taxon
- riceOryza sativat0
- Treatment
- three hand weedings at 15, 30 and 45 DASe0
- Outcome
- grain and straw yieldse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three hand weedings at 15, 30 and 45 DAS resulted in the highest grain and straw yields”
t0“rice”
Claim · model-written summary
P. fluorescens combined with three weedings or pretilachlor plus one weeding was superior for grain and straw yields and gross and net returns.
- Taxon
- riceOryza sativat0
- Treatment
- Combination of P fluorescens with either three hand weedings at 15, 30 and 45 DAS or pretilachlor pre-emergence 0.75 kg/ha followed by one hand weeding at 30 DASe0
- Interactor
- P fluorescensPseudomonas fluorescense0symbiont
- Outcome
- grain and straw yieldse0
- Direction
- superiore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combination of P fluorescens with either three hand weedings at 15, 30 and 45 DAS or pretilachlor pre-emergence 0.75 kg/ha followed by one hand weeding at 30 DAS was found to be superior with grain and straw yields along with similar trend in gross and net returns”
t0“rice”
Claim · model-written summary
The P. fluorescens and pretilachlor plus one weeding combination had the highest benefit: cost ratio.
- Taxon
- riceOryza sativat0
- Treatment
- combination of P fluorescens with pretilachlor pre-emergence at 0.75 kg/ha followed by one hand weeding at 30 DASe0
- Interactor
- P fluorescensPseudomonas fluorescense0symbiont
- Outcome
- benefit: cost ratioe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“benefit: cost ratio was the highest in the combination of P fluorescens with pretilachlor pre-emergence at 0.75 kg/ha followed by one hand weeding at 30 DAS”
t0“rice”
The same questions in other papers
Pretilachlor · weed · Oryza sativa (rice)Results differ
146 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
146 papers more in this group
See all 150 papers →herbicide · weed · Oryza sativa (rice)Positive and negative results
578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative
- negative
- no effect
- negative
599 papers more in this group
See all 603 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.