Época de aplicação foliar de K e Mg na cultura da soja e seus efeitos nos teores de óleo, proteína e produtividade

Abstract

Soy is the raw material for several products, being one of the main crops sown in Brazil. Its high productivity is linked to several management techniques, among them the supply of nutrients that can be done via soil or leaf. Foliar fertilization has grown in recent years, making it an option for supplying or supplementing nutrients. The objective of this work is to evaluate the foliar application of a product containing K and Mg in different reproductive stages of soybean culture. The experiment was carried out at the Antolin farm, in the municipality of Dourados, under the coordinates 22o13’53.6 ”S 54o59’52.1” W. The work was conducted in a randomized block design with 3 treatments (R2-R4; R4-R5.2; control) and 7 repetitions, totaling 21 experimental units. The variety of soybean used was M6410IPRO of undetermined growth type. The variables analyzed were: number of pods per plant, number of grains per pod, mass of 1000 grains, productivity, oil content and protein content. The analysis of variance and means were compared using the Tukey test (p=0.05). The applications in the reproductive stages of soy provided an increase in the mass of 100 grains. There was an increase in the production components in the application carried out in the R2-R4 stage, in relation to the control when compared to the application made in R4-R5.3.