Resposta do Milho Safrinha à Doses de Nitrogênio e de Fósforo

Sichocki, D.; Gott, R. M.; Fuga, Cícero Augusto Guimarães; Aquino, Leonardo Ângelo de; Ruas, Renato Adriano Alves; Nunes, Pedro Henrique Marques Paula

doi:10.18512/1980-6477/rbms.v13n1p48-58

Cited by 22 publications

(17 citation statements)

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“…Therefore, corn productivity is highly influenced by the availability of N in soil (Schroder et al 2000). Morais (2012) reports quadratic response of grain yield to N doses, with maximum yield 10,140 kg ha -1 achieved with the application of 260 kg ha -1 N. Sichocki et al (2014), evaluating maximum economic efficiency of five N doses in winter corn, also noted that corn yield increased with higher N rates, corroborating the results found in this study.…”

Section: Azospirillum Brasilensesupporting

confidence: 85%

Seed inoculation with Azospirillum brasilense and N fertilization of corn in the Cerrado biome

et al. 2016

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Section: Azospirillum Brasilensesupporting

confidence: 85%

Seed inoculation with Azospirillum brasilense and N fertilization of corn in the Cerrado biome

et al. 2016

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“…Figure 2B shows the weight of 1,000 grains, wherein the regression analysis showed linear effect for the hybrid and quadratic in the varietal, which showed maximum mass (373.59 g) obtained at a dose of 157.69 kg ha -1 of N. The hybrid had higher average grain yield per spike (639.72) at a dose of 213.18 kg ha -1 N, however, the varietal showed the maximum production (520.36) when subjected to the dosage 161.03 kg ha -1 N. These results show the morphological characteristics of genetic material, where the varietal corn, probably due to its greater hardiness, uses its reserves to produce larger size and mass grains, unlike hybrid corn, which has increased production of grains per spike but with smaller size and mass grains. Sichocki et al (2014) observed the same behavior mass of 1,000 grains of corn hybrids, which showed a steady increase in its mass with increasing nitrogen content coverage. However, the corn variety, despite its greater mass, found restrictions of absorption and utilization of nutrients, showing that doses above the maximum agronomic point become harmful, and can cause low economic return.…”

Section: Resultssupporting

confidence: 65%

Agronomic performance of hybrids and varieties of maize in function of nitrogen in coverage

Baitelle¹,

Vieira²,

Baroni³

et al. 2016

Afr. J. Agric. Res.

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This study aims to compare the agronomic performance and the productivity of the corn hybrid AG 1051 and the Incaper Capixaba 203 variety in function of different nitrogen (N) doses in coverage. The experiment was held at the Federal Institute of Espírito Santo -Campus Santa Teresa. The design was of randomized blocks and the treatments were arranged in a split plot scheme, with four repetitions. The plots were represented by two corn genotypes and the subplots consisted of five N doses coverage: 0, 60, 120, 180 and 240 kg ha -1 N. After flowering, the plant height, stem diameter, the height of ear insert and the number of leaves per plant were evaluated. After harvest, the number of grains per spike, the 1000 grain and grain productivity were evaluated. All N dosages influenced all the features evaluated for both genotypes, which showed an increase with the increasing dose of the nutrient. The differences between the genetic materials to all the analyzed variables, except in grain productivity were found. The N dose estimated provides greater productivity for average grain (8785.98 kg ha -1 ) for both genotypes 207.17 kg ha -1 of N.

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“…No entanto, deve-se atentar para o fato de que doses excessivas, principalmente de N, podem causar danos ambientais relacionados à perda de N na forma de N 2 O gasoso e de NO 3 que pode lixiviar para o lençol freático (PRIMAVESI et al, 2006). Sichocki et al (2014) afirmam que doses de N e de P não influenciaram o número de fileiras de grãos por espiga no cultivo de milho safrinha, no entanto, o número de grãos por fileira, o teor foliar de N, o teor foliar de P e a massa de mil grãos apresentaram aumento linear em resposta às doses de N. O aumento do número de grãos por fileira contribui para aumento da produtividade e o alto teor de N e de P contribui para maior taxa fotossintética e enchimento dos grãos, especialmente na fase reprodutiva.…”

Section: Resultsunclassified

Extração E Exportação De Macronutrientes Em Lavouras De Milho De Alta Produtividade

Oliveira

Clemente³

et al. 2019

Rev. Agro. Amb.

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RESUMO: O conhecimento da variabilidade da nutrição de plantas e da produtividade em áreas cultivadas com plantas de milho que apresentam alta produtividade pode fornecer importantes subsídios na racionalização do uso de insumos e auxiliar no manejo da fertilidade do solo. Essa pesquisa tem como objetivo determinar os padrões de extração e de exportação de nitrogênio (N), fósforo (P), potássio (K), cálcio (Ca), magnésio (Mg) e enxofre (S) por lavouras de milho de alta produtividade. Quinze talhões de milho cultivados sob sistema convencional e que apresentavam alto potencial produtivo foram amostrados no ano agrícola 2014/2015 na região do Alto Paranaíba (MG) e avaliaram-se a produtividade e a extração e exportação de N, P, K, Ca, Mg e S. Os acúmulos de N, P, K e S em grãos e extração total tiveram efeitos positivos na produtividade da cultura do milho. A massa de mil grãos foi o componente de produtividade mais importante na definição da produtividade.A extração e exportação de N, P, K e S aumentaram linearmente com o aumento da produtividade. Os resultados fornecem dados importantes sobre a absorção e partição de nutrientes dos híbridos atuais e permitem aprimorar as recomendações de adubação para produção de grãos de milho.ABSTRACT: Knowledge on the variability of plant nutrition and productivity in corn plantations with high productivity may provide important subsidies in the restructuring of inputs and in the management of soil fertility. Current research determines extraction and export standards of nitrogen, phosphorus, potassium, calcium, magnesium and sulfur in high productivity corn plantations. Fifteen corn rows cultivated within the traditional system, featuring high productivity, were sampled in the Alto Paranaíba, MG, Brazil, for the agricultural year 2014/2015, and the productivity, extraction and export of N, P, K, Ca, Mg and S were assessed. Accumulation of these macronutrients in the grains and total extraction had positive effects in corn productivity. Mass of one thousand grains was the most relevant productivity´s component. N, P, K and S extraction and export increased linearly with increase of productivity. Results provide important data on the absorption and partition of nutrients of hybrids and allow the improvement of fertilizing recommendations for corn production.

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Resposta do Milho Safrinha à Doses de Nitrogênio e de Fósforo

Cited by 22 publications

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Seed inoculation with Azospirillum brasilense and N fertilization of corn in the Cerrado biome

Seed inoculation with Azospirillum brasilense and N fertilization of corn in the Cerrado biome

Agronomic performance of hybrids and varieties of maize in function of nitrogen in coverage

Extração E Exportação De Macronutrientes Em Lavouras De Milho De Alta Produtividade

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