Desempenho inicial de plantas de soja em função de níveis de qualidade fisiológica e de tratamentos de sementes

Abstract

The use of seeds of high physiological quality is essential for the success of the crop. Allied to this, technologies are sought to maximize the potential of seeds. One of these technologies is the treatment with chemical and/or biological products of diverse action. Thus, the objective was to evaluate the influence of soybean seed treatment with chemical and/or biological products, in lots with superior and inferior physiological quality. The experiment was carried out using soybean seeds of the cultivar 8473RSF RR DESAFIO. A completely randomized design was adopted, in a 2 x 5 factorial scheme, corresponding to two lots with different levels of vigor (upper and lower) and five seed treatments, with four replications. The experiment was implanted in plastic bags for seedlings using two seed lots with high and medium physiological quality. Previously, the seeds were treated with the following products and combinations: Control, Standak top®, Standak top® + Bradyrhizobium + Azospirillum, Standak top® + Bradyrhizobium + Azospirillum + Stimulate® and Standak top® + Bradyrhizobium + Azospirillum + Ascophyllum nosodum. The variables were root, shoot and seedling/plant length at 7, 14 and 21 days after emergence. For the parameters evaluated, there was no effect of the quality and seed treatment factors, possibly due to the favorable conditions that occurred during the study.