| Popis: |
The knowledge about the physical characteristics of seeds, whether coated or not, is essential for the design of machines and equipment. Therefore, the objective of this work was to determine the physical characteristics of colza (Brassica napus L.) seeds coated with bentonite, gypsum and kaolin, treated with fungicide (carboxin + thiram) and aqueous extract of black pepper (Piper nigrum L.). The untreated colza seeds were submitted to the coating process using bentonite, gypsum and kaolin as fillers, and as treatment products were used as fungicide (carboxin + thiram) and an aqueous extract of black pepper which were added to an aqueous solution of 30% PVA glue (cementing mixture). Then the physical characteristics were determined: diameter, number of times increased, porosity, angle of repose, resistance, classification in sieves and weight of one thousand seeds. The experiment was organized in a completely randomized design and arranged in a factorial scheme. The means, when necessary, were compared by the Scott-Knott test. The colza seeds coated with bentonite presented greater diameter, number of times increased, porosity, angle of repose and weight of a thousand seeds, followed by gypsum and kaolin. The treatment products had little influence on the physical characteristics of the coated seeds. Key words: Brassica napus L., diameter, resistance, weight of one thousand seeds. |
