Abstract
Nitrogen fixation ability in free-living condition is one of the properties of diazotrophic bacteria that Azotobacter is one of the famous genera of diazotrophs. Evaluation of nitrogen fixation efficiency can be measured by different methods, such as difference method and plant inoculation. Thus, N2 fixation ability of 18 bacterial isolates such as Azotobacter was measured using completely randomized design with three replications. Bacterial liquid culture was added to bagasse- perlite as a carrier and disinfected seeds were inoculated with prepared inoculants. Treatments were included, negative controls (including carrier without bacteria and without carrier), positive controls (using urea equal to 50% and 100% of fertilizer recommendation) and pots inoculated with bacterial inoculants. Results showed that expect wet weight and nitrogen concentration of root, all measured parameters were significantly influenced by treatments. Other measured parameters such as shoot wet and dry weight, root dry weight, total wet and dry weight, height, diameter and chlorophyll index, were significantly influenced by 50% and 100% fertilizer treatment and highest mean was recorded in these treatments, while among bacterial treatments A. chroococcum 14SP-Ι, A. chroococcum 16SP-2 and Pseudomonas sp. 34SP-Ш were effective. The highest total nitrogen content and nitrogen translocation factor were observed in plants which inoculated by A. chroococcum 16SP-2 that caused an increasing of 32% and 148% compared to negative control (without carrier and bacteria). Also, the highest nitrogen fixation efficiency was measured in 16SP-2 isolate equal to 39.47% by difference method.
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Claims 6
Claim · model-written summary
Inoculation with A. chroococcum 16SP-2 increased maize total nitrogen content by 32% relative to the negative control
- Treatment
- inoculated by A. chroococcum 16SP-2e1
- Interactor
- A. chroococcum 16SP-2Azotobacter chroococcume1symbiont
- Outcome
- total nitrogen contente1
- Direction
- increasinge1
- Value
- 32%e1
- Comparator
- negative control (without carrier and bacteria)e1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Inoculation”
e1“The highest total nitrogen content and nitrogen translocation factor were observed in plants which inoculated by A. chroococcum 16SP-2 that caused an increasing of 32% and 148% compared to negative control (without carrier and bacteria)”
Claim · model-written summary
Inoculation with A. chroococcum 16SP-2 increased maize nitrogen translocation factor by 148% relative to the negative control
- Treatment
- inoculated by A. chroococcum 16SP-2e1
- Interactor
- A. chroococcum 16SP-2Azotobacter chroococcume1symbiont
- Outcome
- nitrogen translocation factore1
- Direction
- increasinge1
- Value
- 148%e1
- Comparator
- negative control (without carrier and bacteria)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Inoculation”
e1“The highest total nitrogen content and nitrogen translocation factor were observed in plants which inoculated by A. chroococcum 16SP-2 that caused an increasing of 32% and 148% compared to negative control (without carrier and bacteria)”
Claim · model-written summary
The 16SP-2 isolate had the highest nitrogen fixation efficiency, 39.47% by the difference method
- Material
- 16SP-2 isolatee2
- Interactor
- 16SP-2e2symbiont
- Outcome
- nitrogen fixation efficiencye2
- Value
- 39.47%e2
- Qualifier
- by difference methode2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Inoculation”
e2“the highest nitrogen fixation efficiency was measured in 16SP-2 isolate equal to 39.47% by difference method”
Claim · model-written summary
Among the bacterial treatments, the Azotobacter and Pseudomonas isolates named in the abstract were effective on maize
- Outcome
- effectivee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Inoculation”
e3“were effective”
Claim · model-written summary
50% and 100% fertilizer treatments significantly raised the measured growth parameters of maize, with highest means in these treatments
- Treatment
- 50% and 100% fertilizer treatmente4
- Outcome
- Other measured parameterse4
- Direction
- highest meane4
- Qualifier
- shoot wet and dry weight, root dry weight, total wet and dry weight, height, diameter and chlorophyll indexe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Inoculation”
e4“Other measured parameters such as shoot wet and dry weight, root dry weight, total wet and dry weight, height, diameter and chlorophyll index, were significantly influenced by 50% and 100% fertilizer treatment and highest mean was recorded in these treatments”
Claim · model-written summary
All measured maize parameters were significantly influenced by treatments, except root wet weight and root nitrogen concentration
- Outcome
- all measured parameterse5
- Direction
- significantly influencede5
- Qualifier
- expect wet weight and nitrogen concentration of roote5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Inoculation”
e5“Results showed that expect wet weight and nitrogen concentration of root, all measured parameters were significantly influenced by treatments”
The same questions in other papers
Azotobacter chroococcum · nutrient: content · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- positive
- positive
inoculation · nutrient: content · Zea mays (maize)Positive and negative results
287 papers in the same direction as this paper · 16 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- no effect
302 papers more in this group
See all 306 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.