INFLUÊNCIA DO TRATAMENTO DE SEMENTES COM BIOESTIMULANTES EM CULTIVARES DE SOJA

Abstract

Soybean cultivation is of great importance for the agricultural scenario in Brazil and the world. With this in mind, techniques have been developed to improve the development of culture. Among them, the treatment of seeds with biostimulants, nutrients and amino acids, aiming to improve productivity, seed quality and sustainability in the agricultural sector. With this, the objective was to evaluate the effect of biostimulants via seed treatment, on the germination and development of soybean seedlings. The experiment was conducted at the Laboratory of the Federal Institute Goiano - Campus Posse. Two commercial biostimulants were used to treat seeds of soybean cultivars M8349 IPRO and M8372 IPRO. To evaluate the agronomic parameters, the germination test, the cold test, the electrical conductivity test, the vigor test in a sandbox and the seedling length and dry mass test were carried out. A completely randomized design was used in a factorial scheme (3x2) + 2, with soybean cv. M8349 IPRO + Biostimulant 1; soybean cv. M8372 IPRO + Biostimulant 1; soybean cv. M8349 IPRO + Biostimulant 2; soybean cv. M8372 IPRO + Biostimulant 2; soybean cv. M8349 IPRO (control) and soybean cv. M8372 IPRO (control) with four repetitions. The data were subjected to analysis of variance and the Tukey and Dunnet tests at 5% probability. The application of biostimulants has different effects on soybean cultivars, which may be influenced by plant genetics. The use of Biostimulant 2 and Biostimulant 1 did not exert significant gains in electrical conductivity, in the cold test, root length and root dry matter in soybean cultivars. The use of Biostimulant 1 had a different effect than Biostimulant 2 on the emergence speed index. The use of Biostimulant 1 and Biostimulant 2 significantly increased the germination of cultivar M8349 IPRO. Cultivar M8372 provided a significant gain in aerial part dry mass when treated with Biostimulant 2, as well as a significant increase in aerial part length for both biostimulants.