Abstract
The aim of the research was to examine the effect of rhizospheric bacteria Azotobacter chroococcum, Pseudomonas fluorescens (strains 1 and 2) and Bacillus subtilis on the growth and yield of onion and on the microorganisms in the rhizosphere of onion. The ability of microorganisms to produce indole-acetic acid (IAA), siderophores and to solubilize tricalcium phosphate (TCP) was also assessed. The experiment was conducted in field conditions, in chernozem type of soil. Bacillus subtilis was the best producer of IAA, whereas Pseudomonas fluorescens strains were better at producing siderophores and solubilizing phosphates. The longest seedling was observed with the application of Azotobacter chroococcum. The height of the plants sixty days after sowing was greater in all the inoculated variants than in the control. The highest onion yield was observed in Bacillus subtilis and Azotobacter chroococcum variants. The total number of bacteria and the number of Azotobacter chroococcum were larger in all the inoculated variants then in the control. The number of fungi decreased in most of the inoculated variants, whereas the number of actinomycetes decreased or remained the same.
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Claims 9
Claim · model-written summary
Bacillus subtilis produced the most IAA.
- Interactor
- Bacillus subtilis
Bacillus subtilise0symbiont - Outcome
- Bacillus subtilis was the best producer of IAAe0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus subtilis was the best producer of IAA”
Claim · model-written summary
Pseudomonas fluorescens strains produced more siderophores and solubilized more phosphates.
- Interactor
- Pseudomonas fluorescens
.JPG?width=60)
Pseudomonas fluorescense0symbiont - Outcome
- producing siderophores and solubilizing phosphatese0
- Direction
- bettere0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Pseudomonas fluorescens strains were better at producing siderophores and solubilizing phosphates”
Claim · model-written summary
Azotobacter chroococcum application produced the longest onion seedlings.
- Treatment
- application of Azotobacter chroococcume0
- Interactor
- Azotobacter chroococcumAzotobacter chroococcume0symbiont
- Outcome
- longest seedlinge0
- Direction
- longeste0
Not reportedTaxonComparator
Verbatim
e0“The longest seedling was observed with the application of Azotobacter chroococcum”
Claim · model-written summary
All inoculated variants had taller onion plants than control sixty days after sowing.
- Treatment
- all the inoculated variantse0
- Outcome
- height of the plantse0
- Direction
- greatere0
- Qualifier
- sixty days after sowinge0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“The height of the plants sixty days after sowing was greater in all the inoculated variants than in the control”
Claim · model-written summary
Bacillus subtilis variant had among the highest onion yields.
- Taxon
- onion
Allium cepae0 - Treatment
- Bacillus subtilise0
- Interactor
- Bacillus subtilisBacillus subtilise0symbiont
- Outcome
- onion yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest onion yield was observed in Bacillus subtilis and Azotobacter chroococcum variants”
Claim · model-written summary
Azotobacter chroococcum variant had among the highest onion yields.
- Taxon
- onionAllium cepae0
- Treatment
- Azotobacter chroococcume0
- Interactor
- Azotobacter chroococcumAzotobacter chroococcume0symbiont
- Outcome
- onion yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest onion yield was observed in Bacillus subtilis and Azotobacter chroococcum variants”
Claim · model-written summary
Total rhizosphere bacteria and Azotobacter chroococcum counts rose in all inoculated variants versus control.
- Treatment
- all the inoculated variantse0
- Outcome
- total number of bacteria and the number of Azotobacter chroococcume0
- Direction
- largere0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“The total number of bacteria and the number of Azotobacter chroococcum were larger in all the inoculated variants then in the control”
Claim · model-written summary
Rhizosphere fungi decreased in most inoculated variants.
Not reportedTaxonComparator
Verbatim
e0“The number of fungi decreased in most of the inoculated variants”
Claim · model-written summary
Rhizosphere actinomycetes decreased or remained the same in inoculated variants.
Not reportedTaxonTreatmentComparator
Verbatim
e0“the number of actinomycetes decreased or remained the same”
The same questions in other papers
Azotobacter chroococcum · yield · Allium cepa (onion)Positive and negative results
1 paper in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
Bacillus subtilis · yield · Allium cepa (onion)Results agree
2 papers in the same direction as this paper
- positive
- positive
inoculation · growth · Allium cepa (onion)Results differ
88 papers in the same direction as this paper · 10 in the opposite direction
- positive
- no effect
- negative
95 papers more in this group
See all 99 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.