Perdas na colheita mecanizada de soja: uma análise quantitativa e qualitativa

Holtz, Vandoir; Reis, Elton Fialho dos

doi:10.1590/s0034-737x2013000300007

Cited by 30 publications

(22 citation statements)

References 7 publications

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“…Reis (2013) observed that there is alteration in the level of damage to the seeds during the mechanized harvest of soybean under the influence of seed temperature, which is also associated with the water content in the grain. The higher the temperature of the seeds, the higher the probability of occurring mechanical damages to the seeds, either in the mechanism of cut and supply or in the threshing system.…”

Section: Resultsmentioning

confidence: 99%

Physical and physiological quality of soybean seeds at three speeds of the harvester

Paixão

Chrispin

Silva

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe mechanized harvesting of soybean is a fundamental tool in the production process of this crop and, if not performed properly, it can result in severe mechanical damage to the seeds, causing significant losses at harvest, particularly due to reduced quality. Thus, this study aimed to evaluate the physical and physiological quality of soybean seeds at three speeds of the harvester, using statistical process control. The experiment was carried out in the municipality of Conceição das Alagoas-MG, Brazil, with three travel speeds: 4.5, 5.0 and 5.5 km h -1 . The seed samples were collected at 20 min intervals for 3 h of operation, with a total of 9 samples for each speed. The evaluations were performed based on the following parameters: grain temperature, water content, concave opening, cylinder rotation, mechanical damage and electrical conductivity. The physical and physiological quality of the seeds was dependent on the displacement speed of machine. The highest speed led to lower mechanical damage and higher vigor of soybean seeds.Qualidade física e fisiológica das sementes de soja em três velocidades da colhedora R E S U M O A colheita mecanizada de soja é fundamental no processo produtivo desta cultura e, caso não seja realizada adequadamente, poderá resultar em danos mecânicos severos às sementes, acarretando prejuízos significativos na colheita, particularmente devido à redução da qualidade. Neste sentido se objetivou, neste trabalho, avaliar a qualidade física e fisiológica das sementes de soja em três velocidades da colhedora, por meio do controle estatístico de processo. O experimento foi realizado em área agrícola, no município de Conceição das Alagoas, MG, com três velocidades de deslocamento da colhedora (4,5; 5,0 e 5,5 km h -1 ). As amostras de sementes foram coletadas em intervalos de 20 min durante 3 h de operação, totalizando nove amostras para cada velocidade. As avaliações foram realizadas a partir dos seguintes parâmetros: temperatura das sementes, teor de água, abertura do côncavo, rotação do cilindro, danos mecânicos e condutividade elétrica. A qualidade física e fisiológica das sementes foi influenciada pela velocidade de deslocamento da máquina. A maior velocidade apresentou menor valor de dano mecânico e maior vigor das sementes de soja. Key words:Glycine max (L.) Merrill mechanical damage vigor control charts Palavras-chave:Glycine max (L.) Merrill dano mecânico vigor cartas de controle

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Section: Resultsmentioning

confidence: 99%

Physical and physiological quality of soybean seeds at three speeds of the harvester

Paixão

Chrispin

Silva

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…Costa et al (1979) observed that the speed regulation of the threshing cylinder and the distance between it and the concave are essential to product quality and loss reduction. Similarly, for Holtz & Reis (2013), the forward speed and reel speed can be decisive in the cutting table losses. According to these authors, both immediate and latent mechanical damage are originated at the time of threshing, i.e.…”

Section: Resultsmentioning

confidence: 99%

Monitoring of Soybean Mechanical Harvesting as a Function of Plot Shapes

et al. 2017

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Information on harvester performance is important in the management and optimization of mechanized agricultural systems. In this sense, the aim of this study was to monitor the operation quality of soybean mechanical harvesting in different plot shapes by means of statistical process control. The harvest was carried out in an agricultural area of a farm located in Uberaba, MG, Brazil, with an experimental design based on the assumptions of statistical quality control and 18, 28, and 24 replications for irregular, rectangular, and trapezoidal plots, respectively. The variables and/or quality indicators of harvester performance were forward speed, engine speed, cylinder speed, and concave opening. The lowest variation occurred in the irregular plot for the quality indicators forward speed and engine speed of harvester. Engine speed and the concave opening of harvester were unstable for all plot shapes. Only the cylinder speed of the soybean harvester presented process stability during operation for the three plot shapes.

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“…Ainda, sementes expostas às condições de campo, por período prolongado, após o estádio R8, apresentam redução na qualidade (Holtz e Reis, 2013).…”

Section: Resultsunclassified

Qualidade de sementes de soja convencional e Roundup Ready (RR), produzida para consumo próprio e comercial

Melo

Brandão

Nóbrega³

et al. 2016

Rev. Ciênc. Agr.

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A garantia de sementes com elevado vigor e boa qualidade é fundamental para o sucesso de qualquer cultura. Sementes com baixo vigor podem apresentar dificuldades na germinação e emergência em campo, sob condições não favoráveis, como a falta de umidade ou baixas temperaturas. Portanto, os produtores, na tentativa de reduzir custos de produção, têm separado grãos da safra produzida para serem utilizados como sementes e isso tem sido cada vez mais frequente. Assim, este trabalho teve como objetivo avaliar o potencial fisiológico de sementes de soja Roundup Ready com sementes convencionais, e comparar sementes "salvas", produzidas por um produtor com sementes comerciais. As sementes foram caracterizadas em laboratório (pureza, massa de mil sementes e teor de água), submetidas a testes de vigor (envelhecimento acelerado, teste de frio e condutividade elétrica), teste de germinação, emergência em areia, índice de velocidade de emergência, crescimento de plântulas, comprimento de raízes e parte aérea das plântulas e matéria fresca e seca. Foi possível identificar maior pureza nas sementes comerciais do que nas sementes "salvas". Os lotes das cultivares convencionais apresentaram potencial fisiológico superior às cultivares de soja Roundup Ready, porém, entre as sementes "salvas" e comerciais não houve diferença quanto ao vigor.Palavras-chave: germinação, pureza, sistema de produção, teste de vigor. A B S T R A C TThe guarantee of seeds with high vigor and good quality is the most important characteristic for the success in soybean cropping. Seeds with low vigor may show some difficulty on germination and field emergence, mainly under adverse conditions, such as moisture deficiency or low temperatures. Thus, this study aimed at evaluating the physiological potential of Roundup Ready (RR) and conventional soybean seeds, 'saved' by a farmer as well as commercial seeds. Nevertheless, some farmers, in an attempt to reduce production costs, have already separated cropped grains produced to be used as seeds and it has been increasingly common. So, this trial aimed at evaluating the physiological potential of Roundup Ready soybean seeds with conventional seeds, and compare the 'saved' seeds, produced by a farmer with commercial seeds. The seeds were characterized in the laboratory (purity, mass of thousand seeds and moisture content). Vigor (accelerated aging, cold test and electrical conductivity test), germination test, emergence on sand, emergence speed index, seedling growth, roots and shoots length of seedlings as well as fresh and dry matter were determined. It was possible to identify that the commercial seeds showed higher purity when compared to the saved ones. Plots of conventional cultivars showed higher physiological potential, and there was no difference concerning the vigor between the 'saved' seeds and commercial ones.

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Perdas na colheita mecanizada de soja: uma análise quantitativa e qualitativa

Cited by 30 publications

References 7 publications

Physical and physiological quality of soybean seeds at three speeds of the harvester

Physical and physiological quality of soybean seeds at three speeds of the harvester

Monitoring of Soybean Mechanical Harvesting as a Function of Plot Shapes

Qualidade de sementes de soja convencional e Roundup Ready (RR), produzida para consumo próprio e comercial

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