Densidade do solo no ambiente solo-semente e velocidade de emergência em sistema de semeadura de milho

Reis, Elton Fialho dos; Schaefer, C. E. G. R.; Fernándes, Haroldo Carlos; Naime, J. de M.; Araújo, Eduardo Fontes

doi:10.1590/s0100-06832006000500003

Cited by 15 publications

(12 citation statements)

References 12 publications

(14 reference statements)

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“…No entanto, a população de plantas foi 14% superior nos tratamentos com uso de hastes, na média das avaliações efetuadas aos 30 e 50 dias após a semeadura (Tabela 1). REIS et al (2006), trabalhando em um Latossolo argiloso, concluíram que a densidade do solo na linha de semeadura foi menor para as hastes sulcadoras em comparação aos discos duplos, o que resultou em uma maior porcentagem de emergência de plantas de milho. A quantidade de plantas acamadas e quebradas foi 48% maior no tratamento com discos duplos, resultado, provavelmente, do menor grau de enraizamento em função do menor volume de solo mobilizado pelo sulcador de adubo.…”

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Semeadura direta de milho com dois tipos de sulcadores de adubo, em nível e no sentido do declive do terreno

et al. 2011

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Semeadura direta de milho com dois tipos de sulcadores de adubo, em nível e no sentido do declive do terreno

et al. 2011

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“…In this sense, even in no-tillage system, the furrow opener mechanisms (FAGANELLO et al, 2008) and soil firming mechanism of seeders (SILVA et al, 2005) may cause different behaviors on the soil compaction. REIS et al (2006) report that the use of different opening mechanisms of the furrow, as double discs and furrow plough may promote differences in soil-seed. Similarly, SILVA et al (2005), studying the effect of three different soil firming mechanism with vertical pressures in the sowing of maize, found that the level of load applied to the soil firming mechanism and the mechanism type may cause changes in physical attributes of the soil, causing soil compaction.…”

Section: Introductionmentioning

confidence: 99%

Oxisol resistence to penetration in no-till system after sowing

et al. 2011

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If inappropriately conducted, management and sowing practices may compromise the environment and the profitability of the agricultural activity. The aim of this study was to analyze the furrow opener mechanisms action and the level of load applied to soil firming mechanism in no-till, on the Oxisol resistance to penetration during soybean sowing, under three soil moistures. The experiment was arranged in split-split plot design, in which the plots were composed by three soil moistures (23.8; 25.5 and 27.5% b.s.), two furrow opener mechanisms subplots (double disks and furrow plough) and the split-split plot of three levels of load applied to soil firming mechanism (12.2; 18.5 and 24.1 kPa), according to randomized blocks design, with three replications. The soil moisture provided different resistance behavior to penetration with the depth, on the seedbed, independently of the furrow opener and the level of load applied to soil firming mechanism. The furrow plough use provided less soil resistance to penetration when compared to the double disk furrow opener, on the seedbed, independently of the soil moisture and the level of load applied to soil firming mechanism. The pressure applied by soil firming mechanism of 18.5 kPa provided the lower resistance to penetration, when the furrow plough was used. The soil resistance to penetration was less on the sowing line than on between rows, with 20 cm deep.KEYWORDS: furrow opener mechanism, soil firming mechanism, soil compaction. RESISTÊNCIA DE UM LATOSSOLO VERMELHO DISTROFÉRRICO À PENETRAÇÃOEM SISTEMA PLANTIO DIRETO APÓS SEMEADURA RESUMO: Práticas de manejo e semeadura mal conduzidas podem comprometer o meio ambiente e a rentabilidade da atividade agrícola. O objetivo deste trabalho foi estudar a ação de mecanismos sulcadores e a pressão da roda compactadora de uma semeadora-adubadora em plantio direto, na resistência de um Latossolo Vermelho distroférrico à penetração (RP), durante a semeadura da soja, sob três teores de água do solo. O experimento foi desenvolvido em esquema de blocos casualizados, arranjado em esquema de parcelas subsubdivididas, sendo as parcelas constituídas de três teores de água do solo (23,8; 25,5 e 27,5% b.s.), as subparcelas de dois mecanismos sulcadores (discos duplos e haste sulcadora) e as subsubparcelas de três pressões da roda compactadora (12,2; 18,5 e 24,1 kPa), com três repetições. O teor de água do solo promoveu diferença na RP com a profundidade, no leito de semeadura, independentemente do sulcador e da pressão da roda compactadora. O uso de haste sulcadora proporcionou menor RP comparada com o sulcador disco duplo, no leito de semeadura, independentemente do teor de água e da pressão da roda compactadora. A pressão aplicada pela roda compactadora de 18,5 kPa proporcionou as menores resistências do solo à penetração, quando a haste sulcadora foi usado. A RP foi menor na linha de semeadura do que na entrefileiras, até 20 cm de profundidade.

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“…The monitoring of this parameter becomes important, since its influence will only occur after germination, which makes the correction costly and difficult (Reis et al, 2006). Averages followed by different letters on the line differ from one another by the Tukey test (P < 5%).…”

Section: Resultsmentioning

confidence: 99%

Distribution of Maize Seed in a Seeding Line Prototype Using Microcontrolled Data Acquisition Systems

2017

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ABSTRACT:The aim of this study was evaluate the longitudinal distribution of maize seeds using a seeding line prototype, whit a microcontroller data acquisition system, at different speeds and types of horizontal feeder discs. Initially it was constructed a prototype simulator of seeding line, in the laboratory, and mounted two systems of microcontroller data acquisitions with infrared sensors for maize seeds counting. A test was conducted in a completely randomized design in split plots with factorial scheme of treatments 5 x 2 x 2, being the parcel two types of microcontroller data acquisition systems (infrared sensors in parallel and an diffuse infrared sensor), the factors were two feeder discs of maize seeds (inclined and normal) and five sowing speeds (3.0, 4.0, 5.0, 6.0, and 8.0 km h -1 ), with three replications, totaling 60 plots. The results showed that the data acquisition systems presented efficiency higher than 93% in the perception of the seeds. The lower speeds provided a seed distribution closer to the desired. The spacing average error between seed with the microcontroller data acquisition system with diffuse sensor was 0.0206 meters and the system with infrared sensors in parallel was 0.0158 meters.

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Densidade do solo no ambiente solo-semente e velocidade de emergência em sistema de semeadura de milho

Cited by 15 publications

References 12 publications

Semeadura direta de milho com dois tipos de sulcadores de adubo, em nível e no sentido do declive do terreno

Semeadura direta de milho com dois tipos de sulcadores de adubo, em nível e no sentido do declive do terreno

Oxisol resistence to penetration in no-till system after sowing

Distribution of Maize Seed in a Seeding Line Prototype Using Microcontrolled Data Acquisition Systems

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