Produtividade do milho em resposta à aplicação de nitrogênio e inoculação das sementes com Azospirillum spp

Cavallet, Luiz Ermindo; Pessoa, Antonio Carlos dos Santos; Helmich, Jaime José; Helmich, P. R.; Ost, Charles Fabiano

doi:10.1590/s1415-43662000000100024

Cited by 51 publications

(54 citation statements)

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“…During the next growing season (2012/2013), inoculation had no effect on most variables, with one exception; GY was significantly affected, thus demonstrating the effectiveness of the bacteria in increased yield of the corn crop, which can best be explained by the plant nutrition (Table 2, growing season 2012/2013). The results obtained in this study are similar to those reported by Cavallet et al (2000), which concluded that inoculation of corn seed with Azospirillum spp. resulted in a significant increase in yield of corn grain.…”

Section: Resultssupporting

confidence: 92%

“…Concentrations of S were below critical levels (1.5-3.0 g kg -1 ), with exception of the nitrogen levels of 60, 90, and 120 kg ha -1 N delivered in topdressing (Table 2, Although there was no significant difference in FCI due to inoculation of corn seed (Table 2, Regarding the growth of corn crop (Table 3), in the growing seasons 2011/2012, it appears that inoculation of corn seed with A. brasilense increased PH and HEI, whereas in the growing seasons 2012/2013, it increased only PH. These results corroborate those obtained by Cavallet et al (2000) that describe the effect of A. brasilense bacteria on the growth of grasses, attributing this fact to the physiological mechanisms, genotype of the seed used, increase growth of lateral and adventitious roots, increased activity of photosynthetic enzymes, and increased nitrogen assimilation, which may have increased the yield of both dry matter and grain. Inoculation and nitrogen fertilization had no effect on the BDS, PP, EL, and ED during either of the two growing seasons (Table 3).…”

Section: Resultssupporting

confidence: 90%

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Inoculation of Diazotrophic Bacteria and Nitrogen Fertilization in Topdressing in Irrigated Corn

et al. 2016

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-Corn is a nitrogen-intensive crop, and the use of management practices such as inoculation of the seed with diazotrophic bacteria, which can maximize crop productivity and reduce the need of nitrogen fertilizers, may result in lower production costs. The present study aimed to evaluate the effect of inoculation of corn seed with Azospirillum brasilense and controlled addition of nitrogen to topdressing on the nutrition, production components, and productivity of crop grain. The experimental design was a randomized block design, with four replications in a 2 × 5 factorial scheme. The treatments consisted of inoculation or not of corn seed with A. brasilense (at 100 mL per 25 kg of seed) and five nitrogen (N) levels in topdressing (0, 30, 60, 90, and 120 kg N ha -1 from urea [45% N]) were applied when the corn was in the phenological growth stage V6. Foliar macronutrients, foliar chlorophyll index (FCI), production components, and yield of corn grain were valuated. Inoculation of corn seeds with A. brasilense increased plant height and grain yield. Fertilization in topdressing, with N levels up to 120 kg ha -1 , linearly increased the foliar nutrients and productivity of corn cultivated in the spring/summer in the low-altitude Cerrado region of Brazil.Keywords: Azospirillum brasilense. Zea mays. nitrogen. no-tillage system. INOCULAÇÃO DE BACTÉRIA DIAZOTRÓFICA E ADUBAÇÃO NITROGENADA DECOBERTURA EM MILHO IRRIGADO RESUMO -O milho é uma cultura exigente em nitrogênio e a utilização de práticas de manejo como a inoculação das sementes com bactérias diazotróficas, poderão maximizar a produtividade da cultura, atrelados a redução do uso de adubos nitrogenados, podendo refletir em menor custo de produção. O presente trabalho objetivou avaliar o efeito da inoculação de sementes de milho com Azospirillum brasilense e adição controlada de nitrogênio em cobertura sobre a nutrição, componentes da produção e produtividade de grãos da cultura. O delineamento experimental foi o de blocos casualizados, com quatro repetições, em esquema fatorial 2 x 5. Os tratamentos foram constituídos pela inoculação ou não das sementes do milho com A. brasilense (dose de 100 mL para 25 kg de sementes) e cinco doses de nitrogênio (N) em cobertura (0, 30, 60, 90 e 120 kg N ha -1 fonte ureia [45% N]) foram aplicadas quando o milho estava no estádio fenológico V6. Teores de macronutrientes foliares, o índice de clorofila foliar (FCI), os componentes da produção e a produtividade de grãos do milho foram avaliados. Constatou-se que a inoculação das sementes de milho com A. brasilense incrementou a altura de plantas e a produtividade de grãos. A adubação em cobertura, com a dose de até 120 kg N ha -1 , aumentou linearmente os teores nutricionais foliares e a produtividade de grãos do milho irrigado cultivado na primavera/ verão na região de Cerrado de baixa altitude do Brasil.Palavras-chave: Azospirillum brasilense. Zea mays. nitrogênio. sistema plantio direto.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 90%

Inoculation of Diazotrophic Bacteria and Nitrogen Fertilization in Topdressing in Irrigated Corn

et al. 2016

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“…na cultura do milho em condições de campo, também não encontraram benefícios consistentes da utilização das bactérias diazotróficas sobre a produtividade. No entanto, Cavallet et al (2000) e Hungria (2010) obtiveram ganhos de produtividade na ordem de 17 e 9 %, respectivamente, com o uso da bactéria Azospirillum spp. em milho.…”

Section: Resultsunclassified

Desempenho Agronômico Do Milho Em Razão Do Tratamento De Sementes Comazospirillumsp. E Da Aplicação De Doses De Nitrogênio Mineral

Sangoi

Silva

Mota

et al. 2015

Rev. Bras. Ciênc. Solo

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“…Azospirillum bacteria are reported as promoting plant growth mainly because of the production of plant protection hormones (Okon & Labandera-Gonzalez, 1994). Cavallet et al (2000) found that inoculation with an Azospirillum spp-based commercial product increased corn grain yield in 17% on average. Reis Júnior et al (2008) reported the effect of inoculation with A. amazonense on the accumulation of root dry matter, which was different for the corn genotypes evaluated.…”

Section: Introductionmentioning

confidence: 99%

Growth and yield of corn hybrids in response to association with Azospirillum brasilense and nitrogen fertilization

et al. 2015

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Growth and yield of corn hybrids in response to association withAzospirillum brasilense and nitrogen fertilization 1 There is a growing interest in optimizing the positive effects of the association between Azospirillum bacteria and corn crop in order to reduce the use of nitrogen fertilizers. This study aimed to evaluate the inoculation efficiency of an A. brasilense-based commercial product in association with different rates of nitrogen fertilization in two corn genotypes. The experiment was arranged in a 2 x 2 x 5 factorial randomized block design, with four replications. The treatments consisted of two corn hybrids (30F53 and CD386); with and without inoculation with a commercial product based on A. brasilense and five nitrogen rates (0, 40, 80, 120 and 160 kg ha -1 ). The variables plant height, basal stem diameter, leaf area, shoot dry matter, leaf nitrogen content, length and diameter of the cob, weight of 100 grains and grain yield were evaluated. Inoculation with A. brasilense provided increases of 11 and 12% in leaf area and shoot dry matter, respectively. There were differences in the response of the corn hybrids for most variables and the increase in nitrogen supply provided increments in the growth and yield of corn.

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Produtividade do milho em resposta à aplicação de nitrogênio e inoculação das sementes com Azospirillum spp

Cited by 51 publications

References 4 publications

Inoculation of Diazotrophic Bacteria and Nitrogen Fertilization in Topdressing in Irrigated Corn

Inoculation of Diazotrophic Bacteria and Nitrogen Fertilization in Topdressing in Irrigated Corn

Desempenho Agronômico Do Milho Em Razão Do Tratamento De Sementes Comazospirillumsp. E Da Aplicação De Doses De Nitrogênio Mineral

Growth and yield of corn hybrids in response to association with Azospirillum brasilense and nitrogen fertilization

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