Desempenho fisiológico de sementes de soja inoculadas com microrganismos e tratadas com complexos nutricionais

Abstract

Soybean is the most economically significant grain-producing crop in Brazil. For the production of grains, several inputs are needed, of which the seeds stand out, they carry the genetics for the production and will give rise to the plant in the field. The success of a grain production field depends directly on the quality of the seeds. Seed treatment with pesticides and seed inoculation with nitrogen-fixing bacteria is na established practice. New technologies for the treatment of seeds with nutritional complexes and microorganisms have had supporters in the market. Thus, the objective of this work is to evaluate the effect of seed treatment with nutritional complexes and inoculation with microorganisms on their physiological quality. The experiment was carried out at the Seed Analysis Didactic Laboratory of the Federal Technological University of Paraná, Dois Vizinhos campus. To carry out the treatments, soybean seeds of the SoyTech™ BS 2606 IPRO cultivar were used. The treatments consisted of three commercially formulated nutritional complexes, namely: Pack Seed®, Ultra Mn Max®, Twin Pack Max® and three products for inoculation of seeds with diferente microorganisms, namely: Streptomyces sp. Azospirillum brasilense and Pseudomonas fluorescens. Seed treatment was performed manually and the tests to evaluate the physiological quality of the seeds were germination, seedling length, dry mass, and emergence speed index. A completely randomized design was used to conduct the trial, with four replications for each treatment. After obtaining the data, they were submitted to analysis of variance (ANOVA) and to the Tukey average comparison test at 5% probability, using the Sisvar computer system. The treatments did not promote an increase in germination. For seedling performance, treatments with Pack Seed® and Twin Pack Max® fertilizers promoted an increase in the emergence speed index and resulted in greater seedling length.