Aplicação de cobalto e molibdênio no crescimento vegetativo da soja

Abstract

Nutrients play a key role in the maintenance and / or attainment of high yields in the soybean crop. Advanced agricultural techniques have considerably increased soybean yield, but have led to the depletion of micronutrients in soils without adequate replenishment. Thus, the objective of this work was to determine the soybean yield components as a function of different doses and times of application of Cobalt (Co) and Molybdenum (Mo) via leaf. The experiment was conducted at the Celeste Farm, in Vera - Mato Grosso. Two applications of Co and Mo were made in the culture with the following doses of 0, 50, 100, 150 and 300 mL, the first application occurred in the V5 stage (fourth fully developed trifoliate leaf), and the second application in R2 (flowering full). A single cultivar BRS811CRR was used in 40 plots of 11.25 m². The following variables were evaluated: plant height, dry mass, one hundred grain mass, number of pods per plant, grains per pod and productivity . The agronomic characteristics of the plants were not altered by the application of molybdenum cobalt via leaf, in the different stages of development of the soybean crop.