Vitaminas atuando como promotores de crescimento em soja

Abstract

Vitamins are bioinputs that act in plant metabolism and contribute to various phases such as chlorophyll synthesis, energy production, respiration, carbon assimilation and gas exchange. They therefore have the potential to improve the productivity of various crops. The aim of this study was therefore to investigate the effect of the vitamins thiamine, nicotinamide and pyridoxine, applied alone or in combination, on the growth and productivity of soybeans. The experimental design was a randomized block trial with 13 treatments and four replicates. The treatments consisted of the combination of three vitamins, thiamine, nicotinamide and pyridoxine, applied via foliar application at stage V6 (vegetative stage). The plant height, the height of the first pod set, the number of branches and nodes per plant, the number of pods per plant, the number of grains per pod, the grain mass per plant, the mass of a thousand grains and the grain productivity were evaluated. The use of vitamins alone or in combination led to a 17.3 % increase in the number of pods per plant, a 22.4 % increase in grain mass per plant, a 4.3 % increase in thousand-grain mass and a 9.7 % increase in grain yield. It was found that the vitamins thiamine, nicotinamide and pyridoxine caused higher values for the traits number of pods per plant, grain mass per plant, thousand-grain mass and soybean grain yield when applied alone or in combination. Only the number of pods per plant showed a positive correlation with the increase in soybean grain yield, but the traits plant height and number of nodes per plant also showed a positive correlation with the soybean production components. Keywords: Glycine max L., growth promoters, vitamins