Produtividade da soja em resposta à aplicação foliar de micronutrientes

Foliar fertilization with micronutrients can improve the nutritional status of soybean plants and can enhance grain yield, especially when grown in the Cerrado region. This study aimed to evaluate the agronomic efficiency of using foliar fertilizers based on the micronutrients Cu, Zn, Mn, Mo and Co during the vegetative and reproductive stages as an alternative to enhance soybean yield in tropical Cerrado soil. The experimental design used was randomized blocks, in a 3 × 5 factorial scheme, with four replications. The treatments consisted of the cultivation of three soybean cultivars (ST 797 IPRO, BMX Bônus IPRO and BMX Única IPRO) and the application of four micronutrient-based foliar fertilizers [Maxi Zinc® (Zn), Nodulus Premium 125® (Mo, Co), NHT Complet® (Cu, Mn, Zn) and Broadacre Black® (Cu, Mn, Mo, Zn)] and the control treatment (no application). Based on the results, it was observed that the application of the foliar fertilizers NHT Complet® and Broadacre® Black were the best options, as they resulted in an increase in plant height, first pod insertion height, pod weight and grain yield for the soybean cultivars ST797 IPRO, BMX Bônus IPRO and BMX Única IPRO. The soybean cultivars ST 797 IPRO and BMX BÔNUS IPRO have greater grain production potential for the Cerrado region in years with drought during the reproductive stage.