Uso de bioestimulantes a base algas marinhas para tratamento de sementes de soja

Abstract

Biostimulants have been used to improve the development and growth of plants, improving their reproductive potential and crop development, as they contribute to the hormonal balance of plants, improving expression of genetic potential. Therefore, the present study aimed to evaluate the influence on the treatment of soybean seeds with algae extracts, evaluating the germination and development of seedlings of the culture. For this, two biostimulants were applied from marine algae, the species Ascophyllum nodosum and Rhodophyta sp. Two experiments were carried out with two soybean cultivars, NS 5933 and TMG 7061. The treatments were formed by a 2 x 4 factorial. The first factor was formed by the products (algae extract) Ascophyllum nodosum and Rhodophyta sp. and the second factor formed by the dose of 0, 1, 2 and 4 mL kg-1 of soybean seed. A completely randomized design with 4 replications was used. For evaluation, germination speed index (IVG), shoot length (CPA), root system length (CSR), gap matter mass (MMF), dry matter mass (MMS), percentage of seedlings were monitored. normal (PN) and percentage of abnormal seedlings (PA). The results were analyzed with analysis of variance and Tukey's test (p<0.05). Algae extracts have little contribution to the potential of seed germination and growth of soybean seedlings. Thus, the use of algae biostimulants in the treatment of soybean seeds promoted few changes in the germination potential of soybean seeds, cultivars NS 5933 and TMG 7061.