Doses de Boro e Nitrogênio em diferentes sistemas de cobertura na cultura da Beta Vulgaris L.

Abstract

The present study sought to evaluate the yield components of the red beet crop when submitted to different mulching systems and the presence or not of fertilization with boron and nitrogen. The experiment was conducted on a private property, located in the municipality of Campina das Missões, Linha Doze (12th Line) - RS, Brazil. The climate of the region is characterized as Cfa. The soil was classifiel as Haplic Dystrudept. The design used was completely randomized (CRD - DIC in Portuguese), bifactorial, with the first factor being soil cover (with and without cover) and the second factor doses of boron and nitrogen [4B - 100N; 0B - 100N, 4B - 0N; 0B - 0N (witness)], with three repetitions totaling 24 experimental units. The evaluated parameters were: green mass of the aerial part and roots, dry mass of the aerial part and roots, length and diameter of the roots, total soluble solids content and productivity. For the conditions carried out in this experiment, in all parameters evaluated, no significant interaction was observed between the factors of soil cover and fertilization rates. The mulching factor showed a significant increase only for the fresh mass averages of the aerial part. The fertilization factor showed a significant increase for the averages of the aerial part height, root length, green mass and dry mass of the aerial part, green mass and dry mass of the roots and productivity. The supply of nitrogen and boron provided the highest averages for all parameters evaluated.