Desempenho de três semeadoras-adubadoras de plantio direto para a cultura do milho

Santos, Ariston Pinto; Volpato, Carlos Eduardo Silva; Tourino, Maria Cristina Cavalheiro

doi:10.1590/s1413-70542008000200030

Cited by 19 publications

(16 citation statements)

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“…OFC is directly related to the displacement velocity of the set, the effective working width of the seeder and operation efficiency; thus, with the increment in the displacement velocity, there is a direct relationship for the increase in OFC. These results corroborate those of Santos et al (2008), who observed increase in OFC with the increase in velocity, working with velocities of 4.9, 6.5 and 7.9 km h -1 .…”

Section: Resultssupporting

confidence: 91%

Operational performance of a tractor-seeder according to the velocity and working depth

Macedo

Nicolau

Nascimento

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe sowing process is one of the most important steps in agricultural production chain, requiring a good efficiency in order to avoid seed and plant population losses. In order to achieve a satisfactory performance of the seeder, the agricultural implement needs to be properly adjusted. Therefore, the present study aimed to verify both the operational performance and sowing quality of the agricultural equipment, depending on different working depths and different operating velocities. The experimental design was a factorial, with two theoretical velocities and three working depths. The velocity of 6.8 km h -1 achieved both a good operating consumption and a low fuel consumption per working area and when associated with working depth of 0.05 m provided better operational performance. However, the operating velocity of 4.8 km h -1 made it possible to increase the number of normal spacing of seeds, an improved quality of sowing and the possibility of greater population.Desempenho operacional do conjunto trator-semeadora em função da velocidade e profundidade de trabalho R E S U M O O processo de semeadura é uma das etapas mais importantes dentro de uma cadeia produtiva, necessitando da maior eficiência a fim de evitar perdas de sementes e, consequentemente, população de plantas. A forma de se obter desempenho satisfatório do conjunto trator-semeadora é através da adequação do conjunto mecanizado; assim, objetivou-se verificar o desempenho operacional e a qualidade de semeadura do conjunto trator-semeadora de precisão em função de diferentes profundidades da haste sulcadora e velocidades operacionais. O experimento consistiu no delineamento em blocos no esquema fatorial 2 x 3 sendo duas velocidades teóricas e três profundidades de trabalho da haste sulcadora. A velocidade do conjunto a 6,8 km h -1 obteve o melhor consumo operacional e o menor consumo por área trabalhada e, quando associada com a haste sulcadora a 0,05 m, proporcionou melhor desempenho operacional do conjunto trator-semeadora porém a velocidade de 4,8 km h -1 possibilitou o aumento do número de espaçamentos normais das sementes, uma melhora na qualidade de semeadura e a possibilidade de uma população maior de plantas.

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Section: Resultssupporting

confidence: 91%

Operational performance of a tractor-seeder according to the velocity and working depth

Macedo

Nicolau

Nascimento

et al. 2016

Rev. bras. eng. agríc. ambient.

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“…Médias seguidas pela mesma letra minúscula na coluna e letra maiúscula na linha não diferiram entre si pelo teste de Tukey a 5% de probabilidade. Santos et al (2008), comparando diferentes sistemas de preparo do solo em relação ao gasto energético, em diferentes velocidades de semeadura, verificaram que a velocidade de 9 km.h -1 foi a que apresentou o maior gasto de energia na barra de tração. Verifica-se, na Tabela 2, que os valores para a força de tração não diferiram nas velocidades estudadas para SD, e que a operação de semeadura no tratamento GPL requereu uma menor força de tração.…”

Section: Resultsunclassified

Demanda Energética De Máquinas Agrícolas Na Implantação Da Cultura Do Sorgo Forrageiro

Rodrigues¹,

Gamero²,

Nascimento³

2011

EnergAgric

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“…However, the use of the shank has become commonplace even in areas without high levels of soil compaction resulting in problems such as excessive soil mobilization, encouragement of erosion and increased weed growth in the sowing row (Reis et al, 2006), as well as increased fuel consumption (Santos et al, 2008) and resulting in increases to production costs.…”

Section: Introductionmentioning

confidence: 99%

Effect of seed-furrow openers on soybean root growth in compacted Oxisol

Modolo¹,

Dedordi²,

Vargas³

et al. 2017

Afr. J. Agric. Res.

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This study aimed to evaluate the effects of seed-furrow openers and soil compaction on parameters such as sowing quality and root growth of soybean. The experiment was conducted using a randomized blocks experimental design with split plots, with the plots arranged by compaction level (1.16, 1.20, 1.22 and 1.26 Mg m -3 ) and the subplots by type of furrow opener (double disk and shank type). Root growth was assessed at three depths (0.00-0.10; 0.10-0.20 and 0.20-0.30 m) in the sowing line and interrow. The sowing quality data means were compared using the Tukey test (p≤0.05), while the root growth data means were compared using the LSD test (p≤0.05). Penetration resistance increased with increasing soil compaction to a depth of 0.20 m. The sowing depth and mobilized soil area were not affected by soil compaction levels. The type of furrow opening mechanism only influenced the sowing depth, with greater depth achieved using the double disc. Neither the seedfurrow openers nor the level of soil compaction significantly influenced soybean root growth when evaluated in the sowing line. The type of furrow opening mechanism did not influence any of the evaluated parameters. Soil compaction altered soybean root growth in the interrow, but did not impede rooting. Regardless of the assessment depth in the interrow, there was a reduction in root volume, length, surface area and diameter with increased soil density.

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Desempenho de três semeadoras-adubadoras de plantio direto para a cultura do milho

Cited by 19 publications

References 0 publications

Operational performance of a tractor-seeder according to the velocity and working depth

Operational performance of a tractor-seeder according to the velocity and working depth

Demanda Energética De Máquinas Agrícolas Na Implantação Da Cultura Do Sorgo Forrageiro

Effect of seed-furrow openers on soybean root growth in compacted Oxisol

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