Avaliação nutricional e de produtividade da soja em função da adubação foliar

Abstract

Soybean (Glycine max (L.) Merrill) has been establishing itself, over the years, as the main crop in the country, concentrating a large part of its production in the Brazilian Cerrado region. This, in turn, has low natural fertility in its soils, which gives the need for good fertilization management so that this legume can obtain significant increases in productivity. Due to this fact, foliar fertilization becomes an important tool to enhance the productivity of soybeans, based on this, the objective was to evaluate the increments in productivity provided by foliar fertilization of soybeans: carried out from the vegetative phase to the reproductive stage. The experiment was carried out at Fazenda Rio Grande, county of Mineiros - GO, evaluating the 2019/2020 crop of the medium cycle cultivar Brasmax Foco Ipro, in a soil of the type Red Oxisoil. The treatments were arranged in 2,800 x 50 m plots with an experimental area of 140 acres, totaling 6 treatments analyzed, each with 4 replications, where 5 were applied foliar nutrients and 1 was used as a control treatment. Data were collected during the stages of R2, R6 and R8, in which nutritional analyzes of the diagnostic leaves, biometric data, thousand-grain weight and yields (estimated and actual) were performed. The insertion of foliar fertilizers was positive in treatments T4 and T5, in which were applied: Boron, Manphos (N; P2O5; S; B; Cu; Mn; Zn) + Animo (Ni; Mo) and; Manphos + Krista Mag (N; Mg), respectively. Despite not being significant, the productivity increments observed for these treatments increased by 6.37% and 4.95%, respectively, in the real productivity, in relation to the control treatment. At the end of the work, it was concluded that there was no significant difference for the evaluated treatments, in relation to the control treatment.