ADUBAÇÃO FOLIAR (S, Mn e Zn) EM FEIJOEIRO COMUM IRRIGADO EM DIFERENTES ESTÁDIOS FENOLÓGICOS

Abstract

The bean plant is a nutrient-demanding plant due to its shallow root system and short cycle. Micronutrient deficiencies, especially manganese and zinc, can reduce metabolic activity due to the demand on physiological processes. Sulfur, too, often neglected, can also limit crop productivity. This study aimed to evaluate the performance of common bean cultivated with different doses of foliar fertilizer applied at two phenological stages. The statistical design adopted for this experiment was the DBC with four replications, where the treatments used were 5 doses of foliar fertilizer (0; 0.250; 0.500; 0.750; and 1 L ha-1) in two phenological stages of application (V4 and R5). As a source, the foliar fertilizer GRAIN SET® was used, which has 4% manganese, 3.14% sulfur and 1.50% zinc. The variables analyzed were: plant height (m), number of pods per plant, number of grains per pod, mass of 1000 grains (g) and yield (kg ha-1). In relation to the phenological stages V4 and R5, only the variable number of pods per plant had a significant difference. For the variables mass of a thousand grains and productivity there was a significant effect. The productivity was between 3437.59 and 5543.58 kg ha-1. This increase in productivity can be explained by the presence of zinc in the foliar fertilizer. The dose of 0.5 L ha-1 for mass of one thousand grains obtained the best performance at a weight of 285.40g.