Desempenho e características construtivas de um protótipo de dosador pneumático para sementes de arroz

Reis, Ângelo Vieira dos; Forcellini, Fernando Antônio

doi:10.1590/s0100-69162009000200009

Cited by 3 publications

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“…Contrary to the results obtained by FERREIRA et al (2010), REIS & FORCELLINI (2009) performing functional tests in precision mechanical metering, concluded that the seed level in the tank and the longitudinal slope of the seed drill did not affect significantly the seeds dosage.…”

Section: Introductioncontrasting

confidence: 79%

“…Agríc., Jaboticabal, v.36, n.5, p.839-845, set./out. 2016 844 Carrying out tests on seeds obtained in the output conducting tube, and in this study, REIS & FORCELLINI (2009) found that the increase in the metering speed reduced the average level of damage to the rice seeds. In the tangential velocities of 0.36; 0.79 and 1.08 km h -1 , the average damages were 4.2; 3.3 and 2.9%, respectively.…”

Section: Resultsmentioning

confidence: 56%

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Sowing performance by a metering mechanism of continuous flow in different slope conditions

et al. 2016

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ABSTRACT:One of the reasons for the success of a productive culture is the correct sowing. Therefore, the seeds must be properly dosed, deposited and not damaged by the metering mechanism of the seed drill. So, the aim of this study was to evaluate in a simulator the sorghum seed deposition by a metering mechanism with continuous flow in different conditions of slope and sowing speed, and evaluate the quality of the deposited seeds assessing mechanical damage and germination. The experiment was carried out at the College of Agricultural Sciences, UNESP in Botucatu-SP, being used a simulator equipped with seed metering mechanism of helical channelled rotor type. The experimental design was randomized in a 3 x 2 factorial arrangement with six replications. The factors were three lateral slopes drill, 3%, 8% and 16%, and two sowing speed, 4 and 10 km h -1 . For the damage and germination variables we added a control treatment whose seeds were evaluated without being distributed by the metering mechanism. The results indicate that increasing the lateral slope and working speed reduce the rate of seed deposition. The metering mechanism provides mechanical damage and contributes to the reduction of seed germination.

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Section: Introductioncontrasting

confidence: 79%

Section: Resultsmentioning

confidence: 56%

Sowing performance by a metering mechanism of continuous flow in different slope conditions

et al. 2016

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Deposição E Danos Mecânicos Em Sementes De Sorgo Utilizando Um Mecanismo Dosador De Fluxo Contínuo Em Ensaio De Bancada

Correia

Silva²,

Sousa

et al. 2014

EnergAgric

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RESUMO:O presente trabalho teve por objetivo avaliar o comportamento da deposição e os danos mecânicos em sementes de sorgo utilizando um mecanismo dosador de fluxo contínuo em diferentes condições de inclinação e velocidade. O trabalho foi realizado na Fundação Agrária de Pesquisa Agropecuária -(FAPA) e na Faculdade de Ciências Agronômicas da UNESP de Botucatu -SP, onde respectivamente foram coletadas as sementes depositadas por um mecanismo dosador e realizada a análise de qualidade verificando a porcentagem de danos mecânicos. Para o estudo o mecanismo dosador foi submetido à condição de três velocidades e três inclinações de trabalho, sendo 4,7 e 10 km h -1 e inclinação de 3%, 8% e 16%. Para a avaliação de danos mecânicos foi utilizado tratamento testemunha, sendo sementes não depositadas pelo mecanismo dosador. Os resultados obtidos no ensaio foram submetidos ao teste de Tukey (p≤0,05), sendo as variações das médias avaliadas pelo teste F ao nível de 5 % de significância. Os resultados mostraram interação entre o fator inclinação e velocidade de trabalho, sendo concluído que para menor inclinação o aumento da velocidade de trabalho do mecanismo dosador reduz a taxa de deposição de sementes. Quanto maior a inclinação de trabalho do mecanismo dosador, menor a deposição de sementes. O mecanismo dosador propicia danos mecânicos às sementes depositadas, independente da condição de inclinação e velocidade do mecanismo dosador. PALAVRAS-CHAVE:Semeadora-adubadora, simulador, declividade. DEPOSITION AND MECHANICAL DAMAGE TO SORGHUM SEEDS USING A TEST BENCH OFCONTINUOUS FLOW FEEDER MECHANISMABSTRACT: This study aimed to evaluate the behavior of the deposition and mechanical damage in seeds using a continuous flow metering system under different slope and speed. Part of the study was conducted at Agricultural Research Foundation Agricultural -(FAPA), where seeds that are deposited by a metering system were collected, and the quality analysis verifying the percentage of mechanical damage were conducted at the Faculty of Agricultural Sciences, UNESP, city of Botucatu-SP. The mechanism deposition was subjected to three different speed conditions (4, 7, and 10 km h -1 ) and three differents working slopes, ( 3%, 8%, and 16%). The results were submitted to Tukey test (p ≤ 0.05), and an analysis of variance with F test at 5% significance level was performed. The results showed interaction between the slope factor and speed of work, and concluded that for flattening increases the working speed of the feeder mechanism reduces the rate of seed deposition. The steeper the slope of the metering mechanism work, the lower the seed deposition. The metering system provides mechanical damage to the seeds deposited, regardless of the condition of slope and speed of the feeder mechanism.

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Influência Da Inclinação Do Terreno E Velocidade De Operação Na Semeadura De Sorgo Por Semeadora De Fluxo Contínuo

et al. 2015

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RESUMO: O objetivo deste trabalho foi avaliar quantitativa e qualitativamente a deposição de sementes de sorgo na semeadura por fluxo contínuo em diferentes velocidades de deslocamento e inclinação do terreno. O trabalho foi realizado na Fazenda Lageado, pertencente a Faculdade de Ciências Agronômicas/UNESP de Botucatu/SP. Foram utilizadas sementes de sorgo Qualimax AG1040 e uma semeadora modelo SHM15/17 de fluxo contínuo com mecanismo dosador das sementes do tipo rotor acanalado helicoidal. Os resultados demonstraram que quando maior a velocidade e a inclinação do terreno, a quantidade de sementes depositadas pelas semadora é reduzida. Para velocidade de 7 km h -1 e inclinação do terreno maior que 13% a deposição de sementes foi reduzida em até 22,5%. Os danos mecânicos nas sementes não são influenciados pelo aumento da velocidade da semeadora de fluxo contínuo e a inclinação do terreno, a ocorrência de danos às sementes é causad pela forma de funcionamento do mecanismo dosador. PALAVRAS-CHAVE:Relevo do terreno, deposição, danos mecânicos em sementes. ABSTRACT:The objective of this study was to evaluate quantitatively and qualitatively the deposition of sorghum seeds at sowing by continuous flow at different speeds of displacement and inclination of the land. The study was conducted at Lageado Farm, belonging to the Fculty of Agricultural Sciences/UNESP in Botucatu/SP. Were used sorghum seeds Qualimax AG1040 and a seeder model SHM15/17 of continuous flow. The results showed that the greater the speed and the slope, the amount of seeds is deposited by reduced seeder in continuous flow. To speed of 7 km h -1 and most field gradient 13% to deposition of seed was reduced to 22,5%. Mechanical damage to the seeds are not influenced by increasing the speed of continuous flow sower and the inclination of the land, the occurrence of damage to the seeds is causad the way of functioning of the metering system..

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Desempenho e características construtivas de um protótipo de dosador pneumático para sementes de arroz

Cited by 3 publications

References 1 publication

Sowing performance by a metering mechanism of continuous flow in different slope conditions

Sowing performance by a metering mechanism of continuous flow in different slope conditions

Deposição E Danos Mecânicos Em Sementes De Sorgo Utilizando Um Mecanismo Dosador De Fluxo Contínuo Em Ensaio De Bancada

Influência Da Inclinação Do Terreno E Velocidade De Operação Na Semeadura De Sorgo Por Semeadora De Fluxo Contínuo

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