Uso de soprador contínuo com fluxo vertical de ar no beneficiamento de sementes de erva-mate
DOI:
https://doi.org/10.24221/jeap.8.3.2023.5548.190-203Keywords:
Ilex paraguariensis A.St.-Hil., South Dakota, tetrazolium test, seeds viability.Abstract
Ilex paraguariensis is mainly propagated by seeds, but the lots have a high percentage of empty and deteriorated seeds, making it important to investigate processing practices to increase the purity and initial viability of the lot. The objective of this work was to evaluate the potential of using a continuous blower with vertical air flow in the processing of yerba mate seeds. Seeds from seven mother-plants were exposed to vertical air stream at openings 0; 3.5; 4.5; 5.5; 6.5 and 7.5 cm, resulting in light (fin) and heavy (base) fractions. The percentage of unhealthy seeds (empty + deteriorated), viable, non-viable and a weight of a thousand seeds (WTS) retained in the base and blade of the blower were evaluated. The percentage of unhealthy seeds retained at the base of the blower reduced with the increase of the air flow opening, there was also a reduction in the fraction of viable seeds and for the percentage of non-viable seeds there was no difference. The WTS of all mother-plants had a significant increase in the fraction contained in the base as the opening increased. It is concluded that the use of the blower increases the physical and physiological quality of yerba mate seeds by promoting the removal of non-integral seeds (empty + degraded). The opening of 5.5 and 6.5 cm, with an average terminal velocity of 100 km h-1 are indicated for the cleaning of yerba mate seeds, considering the viability and the WTS obtained in this work.Downloads
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