Produtividade Do Trigo Irrigado Submetido À Aplicação De Nitrogênio E À Inoculação Com Azospirillum Brasilense

Nunes, Pedro Henrique Marques Paula; Aquino, Leonardo Ângelo de; Santos, Lauana Lopes dos; Xavier, Felipe Oliveira; Dezordi, Luciel Rauni; Assunção, Natália Silva

doi:10.1590/01000683rbcs20150354

Cited by 39 publications

(35 citation statements)

References 15 publications

(21 reference statements)

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“…In contrast, studies demonstrate that the inoculation does not contribute to the increase in production components, yield and N supply for the wheat crop (Rodrigues et al, 2014, Nunes et al, 2015.…”

Section: Introductionmentioning

confidence: 92%

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Alves

Arf

Ramos

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe use of Azospirillum brasilense in the wheat crop still presents contradictory results; thus, it is necessary to identify ideal conditions to obtain satisfactory results. The objective of this study was to investigate the interaction between Azospirillum brasilense and nitrogen doses in a wheat cultivar, conducted with irrigation in the Cerrado region of Mato Grosso do Sul. The experimental design was randomized blocks with a 4 x 2 factorial scheme, four nitrogen doses (0, 40, 80 and 120 kg ha -1 ) applied as top-dressing, associated or not with inoculation of wheat seeds with Azospirillum brasilense. The results show that there was no interaction between N and inoculation. The isolated effect of Azospirillum brasilense promotes an increase in plant height and number of grains per spike. Nitrogen doses promotes significant increases in leaf N content, plant height, number of grains per spike, number of spikes per square meter and grain yield. The conditions under which the experiment was conducted favored the development of the crop, not interfering with grain yield due the inoculation with Azospirillum brasilense. Trigo irrigado submetido à inoculação comAzospirillum brasilense e doses de nitrogênio em cobertura R E S U M O A utilização de Azospirillum brasilense na cultura do trigo ainda apresenta resultados contraditórios, sendo necessário identificar as condições ideais para se obter resultados satisfatórios. Objetivou-se, com o trabalho, investigar a interação entre Azospirillum brasilense e doses de nitrogênio em trigo na região de Cerrado Sul-Mato-Grossense. Adotou-se um delineamento em blocos casualizados com esquema fatorial 4 x 2, sendo quatro doses de nitrogênio (0, 40, 80 e 120 kg ha -1 ) aplicadas em cobertura, associadas à inoculação ou não de sementes de trigo com Azospirillum brasilense. Os resultados mostram que não houve interação entre as doses de N e a inoculação. O efeito isolado do Azospirillum brasilense proporcionou aumento na altura de plantas e número de grãos por espiga. As doses de nitrogênio promoveram incrementos significativos no teor de N foliar, altura de plantas, número de grãos por espiga, número de espigas por metro quadrado e produtividade de grãos. As condições em que o experimento foi conduzido favoreceram o desenvolvimento da cultura, não interferindo na produtividade de grãos em função da inoculação com Azospirillum brasilense. Key words:Triticum aestivum L. nitrogen fertilization plant growth-promoting bacteria Cerrado Palavras-chave:Triticum aestivum L. adubação nitrogenada bactérias promotoras do crescimento de plantas Cerrado

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Section: Introductionmentioning

confidence: 92%

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Alves

Arf

Ramos

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…Nitrogen fertilization is one of the highest costs of the production process of non-leguminous crops (Nunes et al, 2015). Wheat, corn, and rice crops utilize approximately 60 % of the N fertilizer produced in the world (Espíndula et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Galindo

Filho

Buzetti

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The biological nitrogen fixation (BNF) process in grasses is caused by diazotrophic bacteria, particularly Azospirillum brasilense. However, studies are lacking on BNF efficiency to define how much mineral nitrogen (N) can be applied to achieve more sustainable high yields. Furthermore, there should be an analysis of whether urea with the urease enzyme inhibitor NBPT is less harmful, benefiting BNF in grasses. The objective of this study was to evaluate the effect of N sources and N rates associated with inoculation with Azospirillum brasilense regarding foliar diagnosis and leaf chlorophyll index (LCI), agronomic efficiency (AE), and corn grain yield in the Cerrado (Brazilian tropical savanna) region. The experiment was conducted in a no-tillage system in a Latossolo Vermelho Distroférrico (Oxisol). A randomized block experimental design was used with four replications in a 2 × 5 × 2 factorial arrangement as follows: two N sources -urea and Super N, urea with urease enzyme inhibitor NBPT [N -(n-butyl thiophosphoric triamide)]; five N rates (0, 50, 100, 150, and 200 kg ha -1 ) applied in topdressing; and two seed inoculation treatments, one with and one without A. brasilense. N rate positively influenced the LCI and concentrations of N, S, and Mn in leaves, and may increase the concentrations of P, Cu, and Fe; however, higher N rates can reduce AE. The N sources had similar effects, and therefore urea is recommended for N fertilization. Inoculation with A. brasilense decreased leaf concentration of Fe and increased LCI, leaf concentration of P, AE, and corn grain yield; the use of this diazotrophic bacterium is therefore viable even when high rates of N are applied.

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“…Likewise, Nunes et al (2015) studying inoculation with A. brasilense in soils with high and low availability of N and Galindo et al (2015) studying times of application of A. brasilense via leaf also did not observe any effect of inoculation on the productive components and wheat grains yield. It is worth mentioning that bacteria of the genus Azospirillum are native to the soil (SALA et al, 2007), so it is possible that these were found in high densities in the soils under study and, thus, emulating the effect of inoculation.…”

Section: Productivity Of Wheat Grainsmentioning

confidence: 93%

“…However, although most of the research involving seed inoculation using Azospirillum ssp. have reported some benefits relating to the phytohormonal effect, nitrogen fixation potential, and drought tolerance, the increase in grain yields of wheat was not always observed (FERREIRA et al, 2014;GALINDO et al, 2015;NUNES et al, 2015). This indicates that additional studies of this nature are important.…”

Section: Introductionmentioning

confidence: 99%

Technical and economic feasibility of irrigated wheat as a function of nitrogen doses, sources, and inoculation with Azospirillum brasilense

Galindo

Filho

Tarsitano

et al. 2018

SCA

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Azospirillum brasilense is a bacterium known for its biological nitrogen fixation (BNF) in wheat crops. However, there is a lack of comprehensive research defining how much mineral N should be applied to maximize the efficiency of BNF and attain high, economically sustainable yields. Moreover, it would be interesting to investigate whether adding urea with N-(n-butyl) thiophosphoric triamide (NBPT) urease inhibitor might increase BNF in grasses. The objective was to study the effect of inoculation with A. brasilense, associated with varying doses and sources of N, and economically evaluating the yield of irrigated wheat. The experiment was conducted in Selvíria -MS in crop years 2014 and 2015 in Oxisol soil type that was not-tilled. The experimental design was a randomized block with four replications, in a 2 × 5 × 2 factorial scheme, where 2 N sources (urea and Super N -urea with urease inhibitor enzyme), 5 nitrogen fertilization doses in top-dressing (0, 50, 100, 150, and 200 kg ha -1 ), were applied to wheat crops with or without the inoculation of A. brasilense. Our results showed that the supply of N through Super N was not economically superior to the use of conventional urea; therefore, we recommend the use of urea because of the ease of acquisition. The application of 140 kg ha -1 of N combined with inoculation with A. brasilense showed higher grain yield. However, the 50 kg ha -1 dose of urea in the absence of inoculation provided greater economic viability in wheat cultivation, but was not sufficient to ensure high profitability with grain productivity. Key words: Triticum aestivum. Nitrogen fertilization. Total operational cost. No tillage system. ResumoO Azospirillum brasilense se destaca na fixação biológica de nitrogênio (FBN) em cultivo de trigo. Contudo, faltam maiores pesquisas para definição do quanto se pode aplicar de N mineral quanto à eficiência da FBN, para alcançar altas produtividades economicamente sustentáveis. Além disso, seria interessante analisar se a ureia com inibidor da enzima urease NBPT pode ser menos prejudicial,

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Produtividade Do Trigo Irrigado Submetido À Aplicação De Nitrogênio E À Inoculação Com Azospirillum Brasilense

Cited by 39 publications

References 15 publications

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Technical and economic feasibility of irrigated wheat as a function of nitrogen doses, sources, and inoculation with Azospirillum brasilense

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