Milho Safrinha Consorciado Com Urochloa ruziziensis e Produtividade da Soja em Sucessão

Alves, Valdecir Batista; Padilha, Neriane de Souza; Garcia, Rodrigo Arroyo; Ceccon, G.

doi:10.18512/1980-6477/rbms.v12n3p280-292

Cited by 12 publications

(13 citation statements)

References 6 publications

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“…Integrated production systems are considered innovative, aiming to maintain the sustainability of agricultural areas over the years. The adoption of intercropping systems makes crop rotation, increase of straw production for the no-tillage system, reduction of weed occurrence, and pasture supply during the off-season feasible (ALVES et al, 2013;CARMEIS FILHO et al, 2014;SILVA et al, 2015;MACHADO et al, 2017). These systems are complex and dynamic since there is more than one species occupying the same area, so the integration success depends on several factors.…”

Section: Influence Of Glyphosate Underdoses On the Suppression Of Panmentioning

confidence: 99%

“…In southwestern Goiás State, the integrated corn-grass cultivation is an agronomic technique that enables the production of corn grains and increases straw production in the soybean-corn succession in order to guarantee the sustainability of the no-tillage system over the years (OLIVEIRA et al, 2016;QUEIROZ et al, 2016;ALMEIDA et al, 2017). However, intercropped forages may compete with corn and interfere with grain yield, making this cultivation system economically unfeasible (ALVES et al, 2013;FERRAZZA et al, 2016). This competition may lead to a reduction of up to 45% in corn productivity (ADEGAS et al, 2011).…”

Section: Influence Of Glyphosate Underdoses On the Suppression Of Panmentioning

confidence: 99%

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Influence of glyphosate underdoses on the suppression of Panicum maximum cultivars

et al. 2018

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The use of herbicide underdoses allows minimizing the competition of grasses on annual crops, enabling simultaneous cultivation. In this context, the objective of this study was to investigate glyphosate underdoses on the suppression of the initial growth of three Panicum maximum cultivars aiming at the integrated cultivation, in addition to the effects of forage species on the incidence and development of weeds. Three field experiments were conducted. The experimental design was a randomized block design with four replications and eight treatments consisting of increasing glyphosate doses (0, 54, 108, 270, 378, 540, 756, and 1,080 g a.e. ha−1). An atrazine dose of 1,200 g a.i. ha−1 was added to each treatment. Plant phytotoxicity assessments were performed at 7, 14, 21, and 28 days after application. At 80 and 125 days after sowing, the assessments of total dry matter production, leaf dry matter, stem dry matter, and leaf to stem ratio were carried out, in addition to density and dry matter production of weed community. Glyphosate underdoses below 215, 65, and 90 g a.e. ha-1 have a potential to be investigated aiming at the management of P. maximum cv. Atlas, P. maximum cv. Mombasa, and P. maximum cv. Tanzania under intercropping. The three forage species are effective in suppressing weeds.

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Section: Influence Of Glyphosate Underdoses On the Suppression Of Panmentioning

confidence: 99%

Section: Influence Of Glyphosate Underdoses On the Suppression Of Panmentioning

confidence: 99%

Influence of glyphosate underdoses on the suppression of Panicum maximum cultivars

et al. 2018

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“…However, intercropping systems present competition among crop species, in addition to that naturally establish by the weed community. This competition, if not properly managed, can economically make this cropping system economically unfeasible (ADEGAS;VOLL;GAZZIERO, 2011;ALVES et al, 2013). According to Adegas, Voll and Gazziero (2011), corn grain yield can be reduced by up to 45% due to the competition if forage management is not carried out.…”

Section: Introductionmentioning

confidence: 99%

SUPPRESSION OF Urochloa brizantha AND U. ruziziensis BY GLYPHOSATE UNDERDOSES

et al. 2019

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Intercropping of Urochloa species with corn is an alternative to enable the no-tillage system, besides influencing weed community. Therefore, the investigation of underdoses of the herbicide glyphosate to manage grasses in intercropping systems, avoid grain yield losses, and make feasible intercropping in agricultural areas is important. This study aimed to evaluate glyphosate underdoses in the suppression of Urochloa brizantha cv. Marandu and Urochloa ruziziensis and weed control. Two tests were conducted under field conditions in a randomized block design with four replications and eight treatments consisting of increasing glyphosate doses (0, 54, 108, 270, 378, 540, 756, and 1.080 g a.e. ha−1). All treatments received a dose of 1.200 g a.i. ha−1 of atrazine. Evaluations of phytointoxication of brachiaria plants were carried out at 7, 14, 21, and 28 days after application. Moreover, total dry matter, leaf dry matter, stem dry matter, leaf to stem ratio, and canopy height of brachiaria plants and density and dry matter production of weed community were evaluated at 80 and 125 days after sowing. Glyphosate underdoses lower than 238 and 105 g a.e. ha−1 have potential to be investigated aiming at the management of U. brizantha cv. Marandu and U. ruziziensis, respectively.

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“…Em plantio direto, as plantas provavelmente sofreram os efeitos da imobilização do No sistema de manejo convencional do solo com aplicação de quantidade adequada de N às plantas, o consórcio da árvore mulateiro e do capim-xaraés não acarretou perdas para as plantas de milho, o que indica que, nesse sistema, a dinâmica de N é mais eficiente do que no plantio direto. Valores próximos ao observado no presente trabalho foram encontrados por Alves et al (2013), em cultivo consorciado de milho e braquiária, independentemente da densidade populacional da forrageira na área, o que confirma a não interferência na absorção e no acúmulo de N pelas plantas de milho. Ao se comparar o plantio direto ao convencional, observou-se menor acúmulo de clorofila foliar no plantio direto, tanto no tratamento controle quanto nas doses de 50 e 150 kg ha -1 de N. A possibilidade de haver menor disponibilidade de N no solo em plantio direto afeta diretamente a quantidade desse nutriente nos tecidos da planta, o que pode influenciar os ganhos de produção.…”

Section: Resultsunclassified

Adubação nitrogenada em milho e capim-xaraés sob plantio direto e preparo convencional em sistema agrossilvipastoril

Bravin

Oliveira

2014

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o desempenho agronômico das culturas do milho e do capim-xaraés (Urochloa brizantha 'Xaraés') em consórcio, cultivadas em plantio direto e convencional, em sistema agrossilvipastoril, com a aplicação de diferentes doses de nitrogênio em cobertura. O experimento foi conduzido em área de cultivo de milho com a espécie florestal mulateiro (Calycophyllum spruceanum). Utilizou-se o delineamento experimental de blocos ao acaso, com arranjo em parcelas subdivididas, com dois sistemas de manejo do solo (plantio direto e convencional com grade pesada) alocados nas parcelas e com cinco doses de adubação nitrogenada em cobertura (0, 50, 100, 150 e 200 kg ha -1 de N), nas subparcelas, o que totalizou dez tratamentos. A produtividade de grãos de milho respondeu linearmente à aplicação de N em área de plantio convencional. Em área de plantio direto, a dose de 165 kg ha -1 de N em cobertura foi necessária para a obtenção de produtividades satisfatórias. A adubação nitrogenada em cobertura na cultura do milho, até a dose de 200 kg ha -1 de N, não influencia o rendimento do capim-xaraés em consórcio nas entrelinhas, após a colheita do milho.Termos para indexação: Brachiaria brizantha, Zea mays, adubação de cobertura, consórcio, integração lavoura-pecuária, manejo do solo. Nitrogen fertilization in maize and xaraés palisade grass under no-tillage and conventional tillage in an agrosilvopastoral systemAbstract -The objective of this work was to evaluate the agronomic performance of the maize and xaraés palisade grass (Urochloa brizantha 'Xaraés') crops in intercropping, grown in no-tillage and conventional tillage, in an agrosilvopastoral system, with the application of different nitrogen topdressing rates. The experiment was conducted in a maize crop area with the forest species "mulateiro" (Calycophyllum spruceanum). The experimental design was randomized complete blocks, in a split-plot arrangement with two systems of soil management (no-tillage and conventional tillage with heavy disk) allocated to the plots and five rates of nitrogen topdressing (0, 50, 100, 150, and 200 kg ha -1 N) to the subplots, totaling ten treatments. Maize grain yield responded linearly to N application in area of conventional tillage. In no-tillage area, the dose of 165 kg ha -1 N topdressing was necessary to obtain satisfactory yields. Nitrogen topdressing in maize crop until the dose of 200 kg ha -1 N does not influence xaraés palisade grass yield when intercropped between the lines, after maize harvest.

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Milho Safrinha Consorciado Com Urochloa ruziziensis e Produtividade da Soja em Sucessão

Cited by 12 publications

References 6 publications

Influence of glyphosate underdoses on the suppression of Panicum maximum cultivars

Influence of glyphosate underdoses on the suppression of Panicum maximum cultivars

SUPPRESSION OF Urochloa brizantha AND U. ruziziensis BY GLYPHOSATE UNDERDOSES

Adubação nitrogenada em milho e capim-xaraés sob plantio direto e preparo convencional em sistema agrossilvipastoril

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