Effects of micronutrients application on soybean yield

Abstract

Soil fertilization with micronutrients increases micronutrient levels in cultivated areas providing yield gains of different cultures in different production systems. Therefore, the objective of this study was to estimate the agronomic efficiency of a powder fertilizer (a source of micronutrient; 6.8% Mn, 3.9% Zn, 2.1% Fe, 1.2% Cu and 1.1% B), applied to the soil in the agronomic performance of the soybean crop. The experiment was carried out under field conditions, in an Oxisol. The random block design was used, with five treatments and four replicates. The treatments consisted of five doses of the fertilizer: 0, 33.33 kg ha-1, 66.66 kg ha-1, 133.32 kg ha-1 and 66.66 kg ha-1 + 1.4 ton ha-1 of calcium oxide. The contents of Mn, Zn and Fe increased in the soil in all treatments, but no effect was observed in leaf contents with the application. The levels of Zn and Mn are adequate. The dose 133.32 kg ha-1 leads to an increase in the productivity of soybean plants in the Cerrado biome.