DESEMPENHO PRODUTIVO DO FEIJOEIRO COMUM SOB DIFERENTES DOSES E FONTES DE BORO EM DUAS SAFRAS

Abstract

An iron-rich food that is present in the diet of the population is beans (Phaseolus vulgaris L.), cultivated in diverse production systems and Brazilian regions. Among the factors that influence the production of this crop, mineral nutrition is one of the most important. Thus, the present work aimed to evaluate the agronomic characteristics and yield of common bean submitted to different sources and doses of boron, comparing two years of evaluation. The experimental design was a randomized block design in a 4x3 factorial scheme, with four doses of boron (0, 1, 2, 3 kg ha-1) and three sources: boric acid, borax and ulexite. The variables analyzed were plant height, stem diameter, number of pods per plant, number of branches per plant, number of grains per pod, one thousand grain mass and final yield. Data were subjected to analysis of variance and means compared by Tukey test at 5%. The application of boric acid at doses 1 and 2 kg of B ha-1 and ulexite at 2 kg of B ha-1 promoted superior results for the mass of one thousand grains in the 2019 crop, with averages of 284, 37 g, 278.79 g and 284.67 g, respectively. The dose of 2 kg ha-1 for 2018 and 2.1 kg ha-1 for 2019 provided higher yields in their respective years, regardless of the source of boron.