Bioestimulantes no tratamento de sementes de soja

• Autor(a) principal: Santos, Daniel Soares Vilela
• Data de Publicação: 2023
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFU
• Texto Completo: https://repositorio.ufu.br/handle/123456789/39339
• topic: Bioestimulantes; Biostimulants; Tratamento de sementes; Seed treatments; Soja; Soybean; CNPQ::CIENCIAS AGRARIAS

The study of the use of biostimulants in soybean cultivation is extremely important to improve productivity, seed quality and the sustainability of the agricultural sector. These studies contribute to the development of more efficient, economical and environmentally sustainable practices, ensuring a promising future for the soybean crop and for agriculture as a whole. In view of this, the present work aims to evaluate the use of biostimulants in the treatment of soybean seeds and their impact on germination, shoot size and root of soybean seedlings. The experiment was carried out at the Seed Technology Laboratory (LASEM) of the Federal University of Uberlândia, campus Umuarama, Uberlândia-MG. The experiment was set up on February 21 and analysis on February 28, 2023, in which the physiological quality of two commercial cultivars of early soybeans, Guepardo and Exata, treated with the bioregulator Stimulate®, Biomax Azum® and N-Haus®, in the following dosages according to their respective manufacturers. The inoculation of seeds were made in separate trays, in plastic bags and shaken for 1 (one) minute. Afterwards, the seed rests on the germination paper for hygroscopic balance The evaluation of the physiological quality of the seeds was carried out through germination tests, evaluation of seedling vigor, water content, length of the primary root and aerial part of the seedlings. The germination test was carried out by placing four subsamples of 50 seeds in rolls made with moistened paper and kept in a germinator at a constant temperature of 25 ± 2ºC. The first germination count was performed on the fifth day after the beginning of the experiment. Normal seedlings will be graded according to their strength and vigor. The length of the seedlings was evaluated with five repetitions of 20 seeds for each treatment, placed to germinate under the same conditions of the germination test. Cultivar Guepardo showed better values both for part of the root and germination, when using biostimulators Bradyrhizobium japonicum and Azospirillum, compared to cultivar Exata. The use of Stimulate® presented higher values in its use in the Guepardo cultivar, in relation to germination. However, further studies are needed to prove these hypotheses and better understand the variations in absorption and sensitivity to phytohormones between different cultivars.