Resposta do milho verde à inoculação com Azospirillum brasilense e níveis de nitrogênio

Araújo, Raul Matos; Araújo, Ademir Sérgio Ferreira de; Nunes, Luís Alfredo Pinheiro Leal; Figueiredo, Márcia do Vale Barreto

doi:10.1590/0103-8478cr20130355

Cited by 14 publications

(13 citation statements)

References 6 publications

(5 reference statements)

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“…In general, few effects were observed on the contents of nutrients in the leaf tissues, including leaf N content, which was expected to increase because some studies have highlighted that the use of A. brasilense, despite not replacing N fertilization, can influence the partial reduction of the fertilization, as observed by Araújo et al (2014). Gitti et al (2012b) found that, in the absence of N supply as top-dressing, seed inoculation with A. brasilense led to better N nutrition.…”

Section: Resultsmentioning

confidence: 99%

Doses and forms of Azospirillum brasilense inoculation on maize crop

Santini

Buzetti

Filho

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TIn search of a more sustainable agriculture, the use of beneficial microorganisms has been highlighted, because they are low-cost and can reduce the use of fertilizers and increase grain yield. The present study aimed to evaluate the efficiency of A. brasilense inoculation and the best form and dose of inoculation in maize, measuring the impact on some physical characteristics and on its nutrition. The experiment was conducted in a greenhouse, in Ilha Solteira, SP, Brazil, in a completely randomized design, with four replicates and eight treatments: 1) control; 2) Seed 1x; 3) Seed 2x; 4) Soil 1x; 5) Soil 2x; 6) Leaf 1x; 7) Leaf 2x; 8) Seed 1x + Leaf 1x, respectively representing in each treatment the site and dose of application (1x, dose recommended by the manufacturer; 2x, twice the dose recommended by the manufacturer). No differences were found in any physical characteristics evaluated between treatments; however, for nutrient contents in the leaf tissue, there was effect on Zn content. It was concluded that, regardless of the presence of A. brasilense inoculation, forms or dose (in hybrid DKB 350), in general, there were no improvements in the characteristics evaluated. Doses e formas de inoculação com Azospirillum brasilense na cultura do milho R E S U M O Microrganismos benéficos vem sendo amplamente aplicados na agricultura, por possuírem baixo custo e possibilitarem a redução da utilização de adubos e incrementos na produtividade de grãos. Com o presente trabalho, objetivou-se determinar o efeito de doses e formas de aplicação do inoculante Azospirillum brasilense na nutrição de planta e na produção da cultura do milho. O experimento foi realizado em casa de vegetação, no município de Ilha Solteira, SP, em delineamento inteiramente ao acaso, com quatro repetições e oito tratamentos: 1) Testemunha; 2) Semente 1x; 3) Semente 2x; 4) Solo 1x; 5) Solo 2x; 6) Foliar 1x; 7) Foliar 2x; 8) Semente 1x + Foliar 1x, sendo, respectivamente dentro de cada tratamento, o local e a dose de aplicação (1x, dose recomendada pelo fabricante; 2x, dobro da dose recomendada pelo fabricante). Não foram verificadas diferenças para os tratamentos avaliados, nas características avaliadas, já para as concentrações de nutrientes no tecido foliar, houve efeito somente para o Zn. Concluiu-se que, independente da presença de inoculação, da forma ou da dose de A. brasilense avaliada, no híbrido DKB 350, de modo geral, não houve melhorias nas características avaliadas e na nutrição da cultura do milho.

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Section: Resultsmentioning

confidence: 99%

Doses and forms of Azospirillum brasilense inoculation on maize crop

Santini

Buzetti

Filho

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…shoot dry matter to wheat. Araújo et al [9] also reported increases in the number of green corn ears when bacteria were associated with gradual nitrogen dosage, suggesting other growth promotion mechanisms, such as auxin production, already described to rhizobacteria Despite the lack of statistical significance, the inoculants A and B, with the two strains, showed compared to treatments without inoculation or fertilization and that with 60 kg N/ha (half topdressing) (Fig. 1).…”

Section: Wheat Growth and Production Parameters (A) Shoot Dry Weightmentioning

confidence: 87%

“…Besides burdening the budget, it can lead to environmental disturbances [6]. The biological N fixation (BNF) has been an important and viable alternative for several crops [7,8,9,10]. The technology of N-fixing bacteria inoculation is quite widespread [9,11].…”

Section: Introductionmentioning

confidence: 99%

“…The biological N fixation (BNF) has been an important and viable alternative for several crops [7,8,9,10]. The technology of N-fixing bacteria inoculation is quite widespread [9,11]. Several bacteria, such as Azospirillum brasilense, have been studied because it induces plant growth by mechanisms as BNF, phytohormone production, among others [7, 12,13].…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness of Azospirillum brasilense Inoculants to Wheat (Triticum aestivum) in the Micro-region of Curitibanos (SC)

Balbinot

Gordechuk

Eutrópio

et al. 2020

JEAI

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Aims: This work aimed to evaluate the effectiveness of A. brasilense inoculants to the development of wheat at the southern part of Brazil. Study Design: The experimental design was randomized block with twelve treatments, containing two liquid inoculants with the A. brasilense strains Ab-V5 and Ab-V6, with or without nitrogen fertilization and five replicates. The plot area was 4m per 6m and thirty-two rows. The seeds inoculation was performed according to the manufacturer's recommendation, and manual sowing. The top-dressing N fertilization was Urea (Super N- 45%N) at 20 days after emergence (DAE), at 120 kg ha-1 (full dosage) or 60 kg ha-1 (half dosage). Place and Duration of Study: The experiment was performed in a farm in Curitibanos county in Santa Catarina state, Brazil. The experiment was carried out on July to November 2016. Methodology: At 45 DAE, it was performed flag leaves N content Tedesco, et al. [1]. At 115 DAE, it was performed dry shoot weight, plant height, ear sizes, grain N contents and grain yield. The results were submitted to variance analysis (ANOVA) and media compared by Scott-Knot's test at 5% of significance. Results: There was no statistical difference for shoot dry weight, plant height, ear size and yield. The N leaf content was greater with Ab-V5 inoculation and half N dosage (HC5 - 109% higher than the control). The N grain content was greater with the two strains (inoculant B) without, half and full N dosage (WC56 - 51%, HCB56 - 76% and CB56 - 65%, respectively). Conclusion: A. brasilense strains had the ability to increase wheat N accumulation with lower N fertilizing, suggesting their potential as growth inducers, emphasizing the importance of further studies to confirm and understand the mechanisms involved.

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“…É vantajoso o aumento do diâmetro do colmo com a aplicação de N, pois esta característica morfológica é uma das que mais têm sido relacionadas com acamamento e quebramento da planta de milho (Kappes et al, 2013). As doses de N em cobertura promoveram incremento com ajuste quadrático sobre a produtivida- a eficiência de Azospirillum com incremento na produção, sendo esta superior a 30% em relação ao tratamento controle sem inoculação (Araújo et al, 2014).…”

Section: Os Aumentos Verificados No Diâmetro Do Colmo Das Plantas De unclassified

USO DE Azospirillum brasilense PARA O AUMENTO DA EFICIÊNCIA DA ADUBAÇÃO NITROGENADA EM MILHO

Matos¹,

Oliveira²,

Pietroski³

et al. 2017

RBMS

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RESUMO -Objetivou-se com este trabalho avaliar o efeito da adubação nitrogenada em cobertura na presença e na ausência de bactérias do gênero Azospirillum brasilense em milho safrinha. O experimento foi realizado na safrinha de 2015, em um solo classificado como Latossolo Vermelho Amarelo distrófico, no município de Alta Floresta-MT.O delineamento experimental utilizado foi em blocos ao acaso, em arranjo fatorial 4 x 2, com quatro repetições. Os tratamentos consistiram de ausência e presença de Azospirillum e quatro doses de N em cobertura (0, 35, 70, 105 kg ha -1 ). Foram avaliados a altura de plantas, a altura de inserção da espiga, o comprimento de entrenó, o diâmetro do colmo, o comprimento da espiga, o diâmetro da espiga, a massa de sabugo, o diâmetro do sabugo, o número de grãos por fileira e o número de fileiras por espiga, a massa de 100 grãos e a produtividade de grãos. Na associação de Azospirillum com N, houve incremento linear no diâmetro do colmo e no número de grãos por fileira. As doses de N em cobertura apresentaram ajuste quadrático, em que a produtividade aumentou em 15% com a dose de 69,33 kg ha USE OF Azospirillum brasilense TO INCREASE THE EFFICIENCY OF NITROGEN FERTILIZATION ON CORNABSTRACT -This study aims to evaluate the effect of nitrogen fertilization in top dress with and without the Azospirillum brasilense bacteria with interim-harvest of corn. The experiment was completed during 2015's interim harvest on a soil classified as Distrophic Red Yellow Latosol in Alta Floresta, MT. The experiment was conducted using a 4x2 factorial arrangement in random blocks, with four repetitions. The treatments were both with and without the Azospirilllum and four doses of top dress Nitrogen (0, 35, 70, 105 kg ha -1 ). Were evaluated the plant's height, the ear of the corn insertion height, the length of the internode, the diameter of the stalks, the length of the ear, the diameter of the ear, the corncob mass, the corncob diameter, the number of kernels per row and the rows per corncob, the 100 kernels weight and the kernels productivity. In the association between Azospirillum and nitrogen, there was linear increase at the diameter of the stalks and the numbers of kernels per row. The dosage of top dress nitrogen promoted an increase of 15% at the production with 69.33 kg ha -1 of nitrogen in topdress.

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Resposta do milho verde à inoculação com Azospirillum brasilense e níveis de nitrogênio

Cited by 14 publications

References 6 publications

Doses and forms of Azospirillum brasilense inoculation on maize crop

Doses and forms of Azospirillum brasilense inoculation on maize crop

Effectiveness of Azospirillum brasilense Inoculants to Wheat (Triticum aestivum) in the Micro-region of Curitibanos (SC)

USO DE Azospirillum brasilense PARA O AUMENTO DA EFICIÊNCIA DA ADUBAÇÃO NITROGENADA EM MILHO

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