DOSES DE COBRE EM APLICAÇÃO FOLIAR NA SOJA

Abstract

In order to evaluate and understand the contribution of micronutrients to be established and the potential of this form of application to promote plant growth, enabling greater use of these fertilizers, the objective of the work was to evaluate the height of plants, the height of insertion of the first pod, number of branches per plant, dry mass of the aerial part, number of pods per plant, mass of grains per plant, mass of a thousand grains and finally the total productivity and productivity per sack of soybeans subjected to different dosages of Copper via foliar application. The study was carried out under field conditions in Chapadão do Sul – MS. The experimental design used was randomized blocks with five treatments and five replications. The treatments were: T1, control (without doses of Cu), T2, 5g of CuEDTA, T3, 7.5g of CuEDTA, T4, 10g of CuEDTA and T5, 15g of CuEDTA. The data obtained were subjected to analysis of variance (p < 0.05) and, when significant, the means were compared using the Tukey test (p < 0.05). Sisvar, version 4.3, was used for statistical analyses. The use of Copper (Cu) via foliar application favored plant height, insertion height of the first pod, number of branches per plant, dry mass of the area, number of pods per plant, mass of thousand grains, productivity and productivity in sacks. In the range of 8.75g of Cu, the best values for plant height, number of branches per plant and dry mass of the aerial part were obtained.