Produtos químicos e biológicos como bioestimulantes no crescimento inicial da soja

Abstract

Biostimulants are the junction of bioregulators, along with chemical compounds, that influence the hormonal activity of plants, managing to regulate responses to the environment, providing more developed plants with greater production. The objective of this work was to evaluate the biostimulant effect of chemical substances, algae extracts and biological agents used in the treatment of soybean seeds and their influence on the initial growth of plants. The experiment was conducted in a laboratory at the Federal Technological University of Paraná, Santa Helena Campus and also in a property in the same city. The experiment was carried out in a completely randomized experimental design, where ten treatments and three replications were performed, and a lot of soybean seeds of the Brasmax Coliseu i2x variety were evaluated. The ten treatments were performed using chemical compounds, algae extracts and biological products, in addition to their associations in the treatments. Germination tests, shoot and root seedling length, germination speed index and dry mass were performed in the laboratory. The experiment in an environment protected from pests, in pots lasted 35 days, after that, the plants were analyzed for stem diameter, height, number of trifoliums, root length, nodulation and dry mass. With the treatments not differing from the control in the variable abnormal seedlings, it was concluded that there was no phytotoxic effect of the treatments on the seeds in the laboratory tests. Regarding the initial performance of soybean plants, only the variable trifoils showed significant results with the treatments T3 (Treatment with commercial product based on Ecklonia maxima extract + Mo: 24.4 and Zn: 36.6 g l -1) and T9 (Treatment with product formulated based on Trichoderma harzianum, strain ESALQ - 1306 and commercial product based on Ecklonia maxima extract + Mo: 42.62, Zn: 317.16 and Cu: 66.6 g l -1), higher when compared to the control.