TRATAMENTO DE SEMENTES DE SOJA, COM BAIXO E ALTO VIGOR, UTILIZANDO ESTIMULANTE DE CRESCIMENTO

Abstract

Several strategies have been adopted to to increase the quality of seed development, such as seed treatment with organomineral fertilizers (micronutrients and amino acids). Therefore, this study aims to evaluate the effects of organomineral fertilizer treatment on seeds, containing micronutrients and amino acids, in soybean seeds of high and low vigor, on seedling physiological performance. The experiment was conducted in the Seed Analysis Laboratory at IF Goiano, Iporá Campus – Goiás. The treatments consisted of applying six doses of the commercial product “Agressive Desperta,” a mixed organomineral fertilizer (0; 1; 2; 3; 4, and 5 ml per kg of seeds), to two batches of soybean seeds (high and low vigor). High-vigor seeds were freshly harvested seeds of high physiological quality, while low-vigor seeds were obtained using the accelerated aging method, by placing the seeds in a BOD incubator at 45°C with relative humidity of 100% for 48 hours. Treated seeds were allowed to dry on paper towels for one hour. To evaluate the effect of seed treatment with different masses and treated with organomineral fertilizer, the following tests were conducted: First germination count; Germination percentage; Germination speed index; Seedling length; Seedling dry mass; Field seedling emergence; Seedling emergence speed index. The experimental design was completely randomized, with four replications and a factorial arrangement of 2 (high and low seed vigor) x 6 (doses of organomineral fertilizer). The experimental data were subjected to analysis of variance, and when only the seed treatment factor was significant, the averages of the characteristics were subjected to polynomial regression, defining the best fit according to the combination of significance and highest determination coefficient.