Abstract
The use of plant growth-promoting diazotrophic bacteria as an alternative to increase nitrogen (N) availability and contribute to its use by corn can be a less costly and ecologically more viable option. Thus, this study aimed to evaluate the effects of the inoculation with Azospirillum brasilense and Herbaspirillum seropedicae in association with N fertilization on the N use efficiency and its biological fixation by corn, in field conditions, using the 15N-isotope technique. A randomized-block design was used, with nine treatments and six replicates. The following parameters were evaluated: grain productivity, dry matter production, accumulated N in plant, percentage of N from the fertilizer, total N from the fertilizer, use efficiency of N applied as fertilizer and percentage of biological N fixation. Results show that N fertilization associated with A. brasilense and H. seropedicae inoculations influences positively grain productivity in corn. The inoculation with A. brasilense and H. seropedicae combined with 30 and 120 kg ha-1 of N promotes a reduction of N percentages in corn grains and shoot. The increase in N dose associated with the inoculation of A. brasilense and H. seropedicae promotes an increase in the N from the fertilizer in corn grains and shoot and reduces the N use efficiency by the crop. Using the 15N natural abundance technique, it was found that the inoculation with A. brasilense and H. seropedicae contributed, respectively, with in average 19.40% and 9.49% of the N required for the development of corn plants. Key words: Zea mays L., Azospirillum brasilense, Herbaspirillum seropedicae, 15N, biological nitrogen fixation.
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Claims 8
Claim · model-written summary
Azospirillum brasilense inoculation with N fertilization positively influenced corn grain productivity.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- N fertilization associated with A. brasilensee0
- Interactor
- A. brasilense
Azospirillum brasilensee0symbiont - Outcome
- grain productivitye0
- Direction
- positivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results show that N fertilization associated with A. brasilense and H. seropedicae inoculations influences positively grain productivity in corn”
e1“inoculation with Azospirillum brasilense and Herbaspirillum seropedicae”
Claim · model-written summary
Herbaspirillum seropedicae inoculation with N fertilization positively influenced corn grain productivity.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- H. seropedicae inoculationse0
- Interactor
- H. seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- grain productivitye0
- Direction
- positivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results show that N fertilization associated with A. brasilense and H. seropedicae inoculations influences positively grain productivity in corn”
Claim · model-written summary
Inoculation with both bacterial species at 30 kg N per hectare reduced nitrogen percentages in corn grain and shoot.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 30e0
- Interactor
- A. brasilenseAzospirillum brasilensee0symbiont
- Second interactor
- H. seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- N percentages in corn grains and shoote0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation with A. brasilense and H. seropedicae combined with 30 and 120 kg ha-1 of N promotes a reduction of N percentages in corn grains and shoot”
Claim · model-written summary
Inoculation with both bacterial species at 120 kg N per hectare reduced nitrogen percentages in corn grain and shoot.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 120 kg ha-1 of Ne0
- Interactor
- A. brasilenseAzospirillum brasilensee0symbiont
- Second interactor
- H. seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- N percentages in corn grains and shoote0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation with A. brasilense and H. seropedicae combined with 30 and 120 kg ha-1 of N promotes a reduction of N percentages in corn grains and shoot”
Claim · model-written summary
Higher nitrogen dose with bacterial inoculation increased fertilizer-derived N in corn grain and shoot.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increase in N dosee0
- Interactor
- A. brasilenseAzospirillum brasilensee0symbiont
- Second interactor
- H. seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- N from the fertilizer in corn grains and shoote0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in N dose associated with the inoculation of A. brasilense and H. seropedicae promotes an increase in the N from the fertilizer in corn grains and shoot”
Claim · model-written summary
Higher nitrogen dose with bacterial inoculation reduced crop nitrogen-use efficiency.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increase in N dosee0
- Interactor
- A. brasilenseAzospirillum brasilensee0symbiont
- Second interactor
- H. seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- N use efficiency by the crope0
- Direction
- reducese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in N dose associated with the inoculation of A. brasilense and H. seropedicae promotes an increase in the N from the fertilizer in corn grains and shoot and reduces the N use efficiency by the crop”
Claim · model-written summary
Azospirillum brasilense contributed an average 19.40% of the nitrogen required for corn development.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- inoculation with A. brasilensee0
- Interactor
- A. brasilenseAzospirillum brasilensee0symbiont
- Outcome
- N required for the development of corn plantse0
- Value
- 19.40%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inoculation with A. brasilense and H. seropedicae contributed, respectively, with in average 19.40% and 9.49% of the N required for the development of corn plants”
Claim · model-written summary
Herbaspirillum seropedicae contributed an average 9.49% of the nitrogen required for corn development.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- H. seropedicaee0
- Interactor
- H. seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- N required for the development of corn plantse0
- Value
- 9.49%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inoculation with A. brasilense and H. seropedicae contributed, respectively, with in average 19.40% and 9.49% of the N required for the development of corn plants”
The same questions in other papers
Azospirillum brasilense · yield · Zea mays (maize)Results differ
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- no effect
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See all 53 papers →Herbaspirillum seropedicae · yield · Zea mays (maize)Results agree
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inoculation · yield · Zea mays (maize)Positive and negative results
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See all 538 papers →fertilization · yield · Zea mays (maize)Positive and negative results
3,484 papers in the same direction as this paper · 338 in the opposite direction · 85 reporting no difference from an alternative
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See all 3,908 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.