Drying simulation of canola seeds (Brassica napus) with prediction of germination / Simulação de secagem de semestes de canola (Brassica napus) com previsão de germinação




The main objective of this research work is to study of the reduction of germination loss in canola seeds after drying. The experimental procedure based on hermetic storage was used to determine the mathematical model of the germination reduction (SIGMA) for the actual drying conditions. The procedure consists in storing canola seeds hermetically in aluminum pouches, and immersed in water-bath at temperatures of 50°C, 60°C and 70°C, for a range of time periods, and the germination were determined. These data were used to determinate the experimental values of SIGMA function resulted from the multiple regression, presenting high correlation coefficient, and the parameters of this model were applied for the model of equation for canola seeds. This model was included in an existing drying simulation program. Canola seeds, with 21% of moisture content, were dried at 51°C, 61°C and 67 ºC, to validate the mathematical model of simulation, as function of the drying conditions. Higher drying temperatures resulted in higher losses of viability, however, the germination losses were slight lower for 61°C and 67°C. For drying at 51°C, the slope of the canola seeds were not perceptible. The values of germination of canola seeds during drying at 51°C, were higher than estimated germination at the same conditions, however this is not bad, because the simulation presents lower output than the actual germination. Drying temperature of 61°C and 67°C presented high correlation between the experimental points and the drying model. This publication present results to define the time for the drying process to preserve the seed germination.


germination canola sementes - armazenamento canola sementes - secagem drying

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