Semeadora-adubadora: mecanismos de corte de palha e cargas verticais aplicadas

Silva, Paulo Roberto Arbex; Benez, Sérgio Hugo; Jasper, Samir Paulo; Masiero, Fabrício Campos; Riquetti, Neilor Bugoni

doi:10.1590/s1415-43662012001200015

Cited by 15 publications

(13 citation statements)

References 11 publications

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“…The use of smooth coulters reduced soil disturbance by 12.26% when compared with the offset fluted; there was no difference from the treatment without coulters. Mion et al (2009) and Silva et al (2012), while working with different coulters, also found statistical differences between soil disturbance caused by different types of coulters, and the offset fluted coulters also caused more disturbance than the smooth discs.…”

Section: Maximum Furrow Depthmentioning

confidence: 91%

“…Coulters also produce different effects, and according to Silva et al (2012), the offset fluted and smooth coulters generally increase disturbance of the seedbed soil, the effect of the former being more significant. Mion et al (2009) corroborated this statement, since they found significant differences in soil disturbance by these mechanisms, with 0.0015 m² values for 3 Disturbance of Ultisol soil based on interactions between furrow openers and coulters between the rotary planes of the discs, and 70 mm height for the point of contact.…”

Section: Methodsmentioning

confidence: 99%

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Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Francetto

Alonço

Brandelero

et al. 2016

Span. j. agric. res.

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The present study evaluated the effect of different associations between coulters and fertilizer furrow openers on soil disturbance, furrow depth and width, according to forward speed. The study was conducted on a farm in Santa Maria (Brazil/RS), in soil classified as sandy loam Ultisol. The experiment consisted of 24 combinations of treatments with three replications in a 2×3×4 factorial experiment. The combinations were formed by the interaction of the factors including: two types of furrow openers (hoe and double-disc), three types of coulters (no-coulter, smooth and offset fluted) and four levels of forward speed (1.11, 1.67, 2.22 and 2.78 m/s). Soil elevation and soil disturbance area profiles were obtained with the use of a micro profilometer, and disturbance values were calculated with the aid of computer software program Auto Cad. The disturbance area was not affected by speed; it was greater when using the hoe opener, and in association with the offset fluted coulter. Speed was inversely proportional to the depth of the furrows made by the hoe opener. Furthermore, the hoe caused the greatest furrow width (0.26 m) in comparison with the double-disc (0.24 m). The use of different coulters associated with furrow openers increased this variable (0.23 m for the no-coulter condition, 0.25 m with smooth and 0.26 m with offset fluted). The use of coulters combined with furrow openers reduces soil swelling, in approximately 8% for the smooth and 20% for the offset fluted.

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Section: Maximum Furrow Depthmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Francetto

Alonço

Brandelero

et al. 2016

Span. j. agric. res.

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“…Este resultado é explicado como decorrente do uso do disco de corte ondulado de 12 ondas, que possibilita maior mobilização do solo e, desta forma, exige maior força vertical para atingir maior profundidade (Silva et al, 2012), ou seja, maior massa por linha do que o disco duplo. - (1) Médias seguidas por letras iguais, na linha, não diferem entre si, pelo teste de Tukey, a 5% de probabilidade.…”

Section: Resultsunclassified

Escarificação do solo e sulcadores em semeadora para cultivo de milho em Planossolos

Giacomeli

Marchesan

Sartori

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a escarificação mecanizada do solo e diferentes sulcadores, em semeadora, para cultivo de milho em Planossolos. Dois experimentos foram realizados em campo, em dois locais: Santa Maria e Formigueiro, RS. Um delineamento experimental de blocos ao acaso foi utilizado, com quatro repetições e tratamentos de escarificação do solo (ESC) e semeadura direta, com os seguintes sulcadores: haste sulcadora (HS), haste sulcadora e mecanismo de acomodação do sulco (HAS), disco duplo desencontrado (DD) e disco ondulado (DO). Em Santa Maria, foi adicionado o tratamento semeadura em camalhão com haste (CA). Os seguintes parâmetros foram avaliados: densidade, porosidade e macroporosidade do solo; resistência do solo à penetração mecânica (RP); distribuição do sistema radicular; e produtividade de grãos. Em Formigueiro, os tratamentos ESC, HS e HAS resultaram em menor densidade e maior macroporosidade do solo, nas camadas de 0,05-0,10 e 0,10-0,20 m. A RP foi menor no tratamento ESC e no sulco da HS até 0,15 m, onde as raízes se desenvolveram melhor. A produtividade de grãos de milho em Planossolos é maior quando a semeadura é realizada sobre camalhão, solo escarificado ou semeadura direta, com haste sulcadora na semeadora.Termos para indexação: Zea mays, camada compactada, camalhão, haste sulcadora, rotação de culturas, semeadura direta. Deep tillage and furrow opener seeders for corn cropping in PlanosolsAbstract -The objective this work was to evaluate deep tillage and different furrow opener seeders for growing corn in Planosols. Two experiments were carried out in the field, in two different locations: Santa Maria and Formigueiro, in the state of Rio Grande do Sul, Brazil. A randomized complete block experimental design was used, with four replicates, and treatments of deep tillage (DP) and no-till, using different seed-furrow openers: shank (SH); shank plus furrow accommodation mechanism (SHA); double disk (DD); and notched disk (ND). In Santa Maria, the raised-bed treatment using shank was added (RBS). The following parameters were evaluated: soil bulk density, porosity, and macroporosity; soil penetration resistance (RP); root system distribution; and grain yield. In Formigueiro, the DP, SH, and SHA treatments resulted in lower bulk density and higher soil macroporosity in the 0.05-0.10 and 0,10-0.20-m soil depths. The RP was lower in the DP treatment and in the furrow of the SH treatment until 0.15 m, where roots developed better. Corn grain yield in Planosols is greater when sowing is carried out using raised bed, deep tillage, or no-till using shank in the seeder.

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“…Levien et al (2011), also concluded that the opening of grooves through the use of hoe type furrow opener increases the demands of tractive force in relation to the employment of the double-disc. Evaluating the straw cutting mechanisms, Silva et al (2012) showed that the offset fluted coulters need a higher horizontal force to break the resistance of the soil in comparison to the smooth disc, possibly because of the design of the disc and its dynamic action on the soil and contact area are different. Besides that, Germino and Benez (2006) concluded that the presence of disc does not change the traction demands by hoe opener, being 0.77 kN for situations with disc and 0.78 kN for the conditions without the mechanism.…”

Section: Introductionmentioning

confidence: 99%

Specific demands to the traction of cutting discs and furrow openers for the no-tillage system

Francetto¹,

Alonço²,

Carpes³

et al. 2016

Aust J Crop Sci

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The objective of this study was to identify the specific demands to the traction considering the work depth and the soil area mobilized by different associations between crop residue coulter discs and fertilizer furrow openers of crop planters, for the no-tillage system, subject to the ground speed. This experiment was conducted in a farm in the city of Santa Maria (Brazil -Rio Grande do Sul), in a soil classified as Red Ultisol with sandy loam texture. The experiment consisted of 24 combinations of treatments, in a factorial design of 2x3x4. The treatments were obtained by the interaction of furrowers (hoe furrow opener and double-disc opener) with three arrangements in relation to the cutting discs (without disc, smooth and offset fluted coulter) and speeds (1.11, 1.67, 2.22 and 2.78 m s -1 ). The combination of mechanisms was possible through the coupling in a mobile tool holder structure and by using an instrumented tractor as a power source. There was a significant influence of all factors on the variables. The double-disc presented the highest specific demand due to the depth, with 24.08 kN m -1 , while the hoe opener required 19.09 kN m -1 . For the need of traction per mobilized soil area, the double-disc opener also had superior requirement, 9.94% higher. Therefore, the hoe opener is more efficient in the use of traction. The use of cutting discs integrated with this furrow opener reduced the extension of the demands and provided lower speed influence, while the opposite happens for the double-disc furrow opener. Regardless of the combination, an increment of variables was observed with the increase of speed.

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Semeadora-adubadora: mecanismos de corte de palha e cargas verticais aplicadas

Cited by 15 publications

References 11 publications

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Escarificação do solo e sulcadores em semeadora para cultivo de milho em Planossolos

Specific demands to the traction of cutting discs and furrow openers for the no-tillage system

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