Qualidade fisiológica de sementes peletizadas de cubiu (Solanum sessiliflorum Dunal)

Abstract

The objective of this study was to evaluate the effect of different recovery materials on the physiological quality of cubiu seeds. This was evaluated with three binder materials (manioc starch, inert talc and dolomitic limestone) and two binder polymers (polyvinyl acetate and gum arabic) with a 30% concentration, and artificial dye finishing. The experimental design was completely randomized, in factorial scheme 3 (agglomerates) x 2 (binders), and additional treatment (bare seeds), containing four replicates and experimental units of fifty seeds/pellets. The seeds were evaluated for: yield; seed/pellet diameter; thousand seed weight; number of seeds per pellets; germination; germination speed index; mean germination time, seedling length; fresh and dry mass of the seedling and emergence. In general, pelletizing increased the weight and diameter of the propagation unit. The physical barrier applied to the seeds by the pelletization did not influence the germination, but delayed the germination rate in relation to the bare seeds, and this effect was not observed in seedling emergence. The coating with dolomitic limestone and polyvinyl acetate presented the best results of germination and vigor.