Efeito da aplicação de diferentes doses de boro na cultura do repolho

The cabbage Brassica oleracea var. capitata of the Brassicaceae family, is an extremely important crop, ensuring the food security of many Brazilian families, due to its large amount of nutrients. It also has a social character, as a result of the opportunity for labor, being carried out most of the time by small farmers and family farming. There is a large discrepancy between the levels of productivity obtained in the different producing regions of Brazil. The incidence of defects interferes directly and continuously in the quality and commercialization of this vegetable. Brassicas have a high boron requirement, inadequately supplying this micronutrient can limit production as well as marketing. Thus, this work aimed to evaluate the effect of applying different doses of boron on the cabbage crop. The experiment was carried out in the experimental area of the Federal Institute of Education, Science and Technology of Minas Gerais, Campus Bambuí. The experimental design used was randomized blocks, with treatments consisting of five doses of boron (0;2;4;6; and 8 kg ha-1), with four replications. The plots consisted of four 1.6 m rows spaced 0.8 x 0.3 m. The following evaluations were carried out: total weight, average weight, commercial weight, longitudinal diameter, transversal diameter, circumference, number of internal leaves, number of external leaves, compactness, number of plants with head, number of plants without head and dry sample. Under the conditions in which this experiment was conducted, there was no statistical difference with the application of different doses of boron between treatments.