SUBSTÂNCIAS BIOESTIMULANTES VIA TRATAMENTO DE SEMENTES NA CULTURA DA SOJA

Abstract

Biostimulants are defined as a mixture of organic substances, plant extracts, plant regulators and other substances such as amino acids, nutrients and vitamins. Its application can, depending on its composition, concentration, proportion of substances and the way of application, stimulate plant growth. Based on the hypothesis that biostimulant substances used in seed treatment can influence the growth and productive potential of soybean crops, the aim of this study was to evaluate the use of biostimulant substances based on algae extract, amino acids and phytohormones in the treatment of seeds, in the edaphoclimatic conditions of the cerrado region. The experiment was carried out in an area designated for experimentation belonging to the farm of the Faculty of Agronomy at the University of Rio Verde - UniRV. The experimental design used was randomized blocks with four replications. The treatments were composed of 4 isolated substances, at a dose of 1.0 mL kg-1 of seed: 1 - Red algae; 2 - Brown algae; 3 – Amino acids; 4 – Phytohormones; and 5 – Control. The morphological variables (stem diameter, number of nodes, plant height, leaf area, number of pods and number of grains), chlorophyll index, mass of 1000 grains and grain productivity were determined. The data were subjected to analysis of variance and cases of significance to the Tukey mean test. The use of biostimulants in seed treatment promoted changes in morphological parameters, chlorophyll indices and grain productivity.

KEYWORDS: amino acids, seaweed extract, phytohormones.