Tratamento de sementes e adubação foliar no desenvolvimento e na produtividade da soja

Abstract

The increasing productivity of Brazilian soybean is related to scientific advances and the use of technologies in the production sector. Among these technologies is the application of foliar fertilizers and biostimulants, among others. The objective of this work was to evaluate the application of fungicides associated with Bradyrhizobium and Azospirillum, and cobalt and molybdenum in soybean seeds, as well as to evaluate the application of foliar fertilizers with macro and micronutrients at different stages of plant development on grain yield. The experiment was implemented at the Fazenda Experimental de Ciências Agrárias da Universidade Federal da Grande Dourados (UFGD), in the municipality of Dourados, MS, located at geographical coordinates of latitude 22º 14' S, longitude 54º 59' W and altitude 455 meters, in the 2021/2022 agricultural season. The soil of the experimental area is classified as Dystrophic Red Latosol with clayey texture. The experimental design used was a randomized block design with six treatments and four repetitions, and sowing of 28 rows. The soybean variety used was KWS 6316 IPRO. The determinations made were: accumulation of dry matter of the aerial part, plant height, number of branches per plant, insertion of the first pod, number of pods per plant, productivity and mass of hundred grains. Seeds treatment with fungicide, Bradyrhizobium, Azospirillum, Cobalt and Molybdenum increases soybean yield. Foliar fertilizer with bioregulator function, combination of magnesium and carboxylic acids promotes greater engraftment of soybean plants. Foliar application of macro and micronutrients at different stages of growth and development of soybean increases yields even under veranic conditions.