BIOESTIMULANTES SOBRE O POTENCIAL FISIOLÓGICO DE SEMENTES DE SOJA

Abstract

Soybeans are the most important cereal for Brazil due to the area planted and their global importance as a source of oil and protein in animal and human food. The use of seed treatment (ST) products is essential to ensure that they express their physiological quality and vigor in the field. In this context, the aim of this study was to assess the physiological potential of soybean seeds treated with commercial nutritional or physiological products. The seeds were subjected to five products frequently used to treat soybean seeds. The treatments were: T0: no seed treatment (control); T1: Nitrogen, Phosphorus, Potassium, Molybdenum and Total Organic Carbon; T2: Cobalt and Molybdenum; T3: Cobalt, Molybdenum, Zinc; T4: Cobalt, Molybdenum, Nickel and Algae Extract. To assess the quality of the seeds, various tests were carried out, the main ones being: dry mass of leaves, plant height; emergence in the field; average time taken to reach maximum emergence; emergence speed index and emergence speed coefficient. A completely randomized design (DIC) was used, with five treatments and four replications. There was no statistical difference for the emergence and emergence speed index. Seeds subjected to treatments T2 and T4 showed superior results in terms of leaf dry mass, stem dry mass and plant height. In general, there was no increase in the physiological quality of soybean seeds submitted to treatments with micronutrients and biostimulants.