Abstract
The lack of studies on the benefits of growth-promoting bacteria associated with sources and doses of nitrogen fertilizers in maize in tropical regions has raised many doubts on the use of nitrogen management, as well as recommendation for the adequate dose for maize production. Therefore, the objective of this study was to evaluate the effect of the doses and sources of nitrogen associated with the absence and presence of seed inoculated with Azospirillum brasilense in the contents of N, P, K, Ca, Mg and S in the roots, culm and leaf of maize plants. It was used a completely randomized design, in a 4 x 2 x 2 factorial scheme, consisting of four nitrogen doses (0; 60; 120; and 180 kg ha-1 of N), two sources of N (common urea and urea treated with urease inhibitor) and absence and presence of inoculation with Azospirillum brasilense, with four replications. The results identified that the N doses positively influenced the concentration of N, P, and S in the culm of maize plants. The use of urea with urease inhibitor was not efficient in optimizing nitrogen fertilization, providing similar accumulations of macronutrients to common urea. The inoculation with Azospirillum brasilense promoted a concentration of 10.4% of N in the stem when compared to urea without inoculation. Seed treatment with Azospirillum brasilense at a concentration of 1 g / kg of seed at a dose of 180 kg ha-1 of N provided a higher content of macronutrients in corn, regardless of the sources of common urea or urea treated with a urease inhibitor
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Claims 6
Claim · model-written summary
Nitrogen dose positively influenced culm nitrogen concentration.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results identified that the N doses positively influenced the concentration of N, P, and S in the culm of maize plants”
Claim · model-written summary
Nitrogen dose positively influenced culm phosphorus concentration.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results identified that the N doses positively influenced the concentration of N, P, and S in the culm of maize plants”
Claim · model-written summary
Nitrogen dose positively influenced culm sulfur concentration.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results identified that the N doses positively influenced the concentration of N, P, and S in the culm of maize plants”
Claim · model-written summary
Urease-inhibited urea produced similar macronutrient accumulation to common urea.
- Treatment
- urea with urease inhibitore0
- Outcome
- accumulations of macronutrientse0
- Direction
- similare0
- Comparator
- common ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of urea with urease inhibitor was not efficient in optimizing nitrogen fertilization, providing similar accumulations of macronutrients to common urea”
t0“maize”
Claim · model-written summary
Azospirillum inoculation produced 10.4% stem N concentration relative to urea without inoculation.
- Treatment
- inoculation with Azospirillum brasilensee0
- Interactor
- Azospirillum brasilense
Azospirillum brasilensee0symbiont - Outcome
- concentration of 10.4% of N in the steme0
- Direction
- promotede0
- Value
- 10.4%e0
- Comparator
- urea without inoculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation with Azospirillum brasilense promoted a concentration of 10.4% of N in the stem when compared to urea without inoculation”
t0“maize”
Claim · model-written summary
Azospirillum seed treatment with 180 kg ha-1 N raised maize macronutrient content regardless of urea source.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Seed treatment with Azospirillum brasilense at a concentration of 1 g / kg of seed at a dose of 180 kg ha-1 of Ne0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- content of macronutrientse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment with Azospirillum brasilense at a concentration of 1 g / kg of seed at a dose of 180 kg ha-1 of N provided a higher content of macronutrients in corn, regardless of the sources of common urea or urea treated with a urease inhibitor”
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