ADUBAÇÃO COMPLEMENTAR DE MANGANÊS NA CULTURA DE CANA-DE-AÇÚCAR

Abstract

Sugarcane stands out as one of the most important agricultural crops economically, its production is linked to availability of macro and micronutrients in the soil. Manganese (Mn) is the second most required micronutrient by the plant. The present study aimed to evaluate the effect of different doses of manganese on development, productivity, technological and biometric attributes in two sugarcane cultivars. This study was conducted at the Federal Institute of Goiano - Campus Ceres, in the Research Unit in Cana-de-Açúcar, in collaboration with the CRV Industrial Plant. The experimental design used was the completely randomized in subdivided plots, being the plot, 2 cultivars (RB92579 and SP801816), and the subplots, 4 doses of manganese (0; 5.0; 10 and 15 kg ha-1), with three repetitions. The variables evaluated were plant height (AP), number of leaves (NF), stem diameter (DC), leaf area (AF), yield of stems (PRO), stock pol (PC), apparent sucrose content (POL) fiber content (Fiber), reducing sugars total (ART), reducing sugars (AR). The data obtained were submitted to analysis of variance. There were differences for the cultivar factor for leaf area, leaf width, broth pol and apparent sucrose content, but there was no interaction between cultivar and dose or isolated factor dose. The biometric variables (AP, DC, NG, NF, LF and CF) as technological (ATR, TSS, PC, FIBER, ART, PBU, AR, PRZ and BRIX) did not demonstrate significance. The yield of stems was not influenced by the treatments evaluated.