Fontes alternativas e doses de nitrogênio no milho safrinha em sucessão à soja

Soratto, Rogério Peres; Pereira, Magno; Costa, Tiago Aparecido Mingotti da; Lampert, V. do N.

doi:10.1590/s1806-66902010000400002

Cited by 51 publications

(50 citation statements)

References 12 publications

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“…Similar results were obtained by Soratto et al (2010), who found no difference in the number of kernels per ear and 100-kernel weight between crops treated with ammonium sulfonitrate, ammonium sulfate, starea, and urea and by Valderrama et al (2011) and Maestrelo et al (2014), who concluded that the use of polymer-coated urea did not influence the agronomic characteristics or grain yield of irrigated corn in the soil-climatic conditions of lowaltitude Cerrado biome. However, in the 2014/15, Super N ® yielded a slightly higher 100-kernel weight compared with urea (Table 1).…”

Section: Resultssupporting

confidence: 79%

Economic analysis of corn inoculated with Azospirillum brasilense associated with nitrogen sources and doses

Galindo

Filho

Tarsitano

et al. 2017

SCA

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Azospirillum brasilense is a bacterium known for its biological nitrogen fixation (BNF) in corn 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 NBPT urease inhibitor might increase BNF in grasses. Therefore, the aim of this study was to determine the effect of inoculation with Azospirillum brasilense associated with N sources and doses in a Cerrado biome soil by evaluating the grain yield of irrigated corn in economic terms. The experiment was conducted in Selvíria, MS, Brazil under a no-till system on a Latossolo Vermelho distrófico (Oxisol). The experiment was set up as a randomized block design with four replications in a 2 × 5 × 2 factorial arrangement consisting of two sources of N (urea and urea with NBPT urease enzyme inhibitor) and five N doses applied as top-dressing (0, 50, 100, 150, and 200 kg ha -1 ), with and without the inoculation of seeds with A. brasilense. Inoculation with Azospirillum brasilense makes corn growth much more profitable, irrespective of the dose and source of N. Addition of 200 kg ha -1 N in the form of conventional urea coupled with inoculation with Azospirillum brasilense increases grain yield; however, the highest economic return is obtained with N applied at 100 kg ha -1 with conventional urea and inoculation. Key words: Fertilizer with improved efficiency. Nitrogen fertilization. No-tillage system. Total operational cost. Urea. Zea mays. ResumoO Azospirillum brasilense se destaca na fixação biológica de nitrogênio (FBN) em cultivo de milho. 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, beneficiando a FBN em gramíneas. Sendo assim, objetivou-se estudar o efeito da inoculação com Azospirillum brasilense, associado às doses e fontes de N, em solo de Cerrado, avaliando economicamente a produtividade de grãos de milho irrigado. O experimento foi desenvolvido em Selvíria -MS, em sistema plantio direto, em Latossolo Vermelho distrófico. O delineamento experimental foi em blocos

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Section: Resultssupporting

confidence: 79%

Economic analysis of corn inoculated with Azospirillum brasilense associated with nitrogen sources and doses

Galindo

Filho

Tarsitano

et al. 2017

SCA

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“…For ear length, each unit variation in seed distribution along the row promoted a reduction of 0.011 cm (Table 2), which is probably related to the reduction in SD, since plants with thinner stalks have lower reserve capacity and, as a result, the transport of nutrients to the ears is hampered (Soratto et al, 2010). In addition, EL is defined at an early stage, when corn plants have twelve fully expanded leaves (V12).…”

Section: Resultsmentioning

confidence: 99%

Production components of corn as function of seed distribution along the planting row

Silva

Cunha

Almeida

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C THigh corn yields in high-tech systems are related to proper crop implementation. This study aimed to evaluate the effects of variability in the distribution of seeds along the planting row on corn production components. The study was conducted under Cerrado conditions in the municipality of Urutaí, GO, Brazil. The experimental design was randomized blocks in a 5 x 2 factorial scheme, with four replicates. The effects of five coefficients of variation (0, 20, 40, 60 and 80%) of non-uniformity in the spatial distribution of seeds along the planting row of two corn hybrids (P30F53HX and P3646HX) were evaluated. No interactions were observed for the analysed corn variables. However, as the non-uniformity in seed distribution along the planting row increased, stalk diameter, hundred-grain weight, number of rows per ear, number of kernels per row and ear length decreased. Additionally, linear reductions were observed in corn grain yield with the increase in the coefficient of variation of the spatial distribution of seeds along the planting row. Between the hybrids, the 30F53HX showed higher hundred-grain weight.

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“…Da mesma forma, porém estudando doses de nitrogênio no milho safrinha em sucessão à cultura da soja, Soratto et al (2010) observaram que o diâmetro do colmo foi incrementado pela elevação das doses de nitrogênio em cobertura, independentemente da fonte utilizada.…”

Section: Resultsunclassified

Produtividade do minimilho em função das adubações nitrogenada e potássica

et al. 2014

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Effect of nitrogen and potassium fertilization on baby corn yieldThere is a lack of information regarding nitrogen and potassium fertilization on the production of baby corn. When ears are collected before grain formation, the amounts of required nutrients can be differentiated. This study evaluated the response of baby corn at different nitrogen and potassium fertilization rates in a medium texture soil in the region of Maringá PR Brazil. Data for adequate nutrient recommendation are produced for the crop, avoiding losses and environmental contamination. The experiment was conducted in the Iguatemi Experimental Farm during the summer harvest of 2010-2011 and the second corn crop of 2011. The experiment was arranged in a 4x4 factorial randomized block design with a, with 4 rates of nitrogen (0, 50, 75 and 100 kg ha Há grande carência de informações quanto à adubação com Nitrogênio e Potássio para a produção de minimilho. Quando colhido antes do início da formação de grãos, as quantidades de nutrientes exigidas podem ser diferenciadas. Por essa razão, o presente trabalho teve por objetivo avaliar a resposta do minimilho às adubações nitrogenada e potássica em solo de textura média na região de Maringá, gerando dados que possibilitam a recomendação da aplicação de doses adequadas desses nutrientes para a cultura, evitando os desperdícios e a contaminação ambiental. Os experimentos foram conduzidos na Fazenda Experimental de Iguatemi, na safra verão 2010/2011 e safrinha 2011. O delineamento experimental para os dois experimentos foi blocos casualizados no esquema fatorial 4 x 4, utilizando-se quatro doses de nitrogênio (N) (0, 50, 75 e 100 kg ha ), aplicadas 50% na semeadura e 50% em cobertura no estádio V6 de desenvolvimento. O cultivar de milho-pipoca utilizado foi o IAC 125, híbrido triplo top cross, de ciclo precoce. Para as condições em que foi realizada a pesquisa, o potássio e a interação NK não influenciaram a altura de plantas e o comprimento das espiguetas comerciais na safra verão. A máxima produtividade de minimilho, na safra verão, foi obtida com a aplicação de 64,35 kg ha -1 de nitrogênio, não havendo incremento na produtividade com a aplicação de potássio. Na safrinha, a maior produtividade foi alcançada com a combinação das doses 60,9 e 51,23 kg ha -1 de nitrogênio e potássio, respectivamente. Palavras-chave:Zea mays L., adubação, componentes de rendimento.

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Fontes alternativas e doses de nitrogênio no milho safrinha em sucessão à soja

Cited by 51 publications

References 12 publications

Economic analysis of corn inoculated with Azospirillum brasilense associated with nitrogen sources and doses

Economic analysis of corn inoculated with Azospirillum brasilense associated with nitrogen sources and doses

Production components of corn as function of seed distribution along the planting row

Produtividade do minimilho em função das adubações nitrogenada e potássica

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