USO DE ADITIVOS NA EFICIÊNCIA DA ADUBAÇÃO FOLIAR EM CANA-DE- AÇÚCAR (Saccharum officinarum L.)

Abstract

The objective of this study was to evaluate the effect of foliar fertilizer rates with macronutrients and micronutrients on second-cut sugarcane, with and without additives. The experiment was carried out in the experimental area of the Denusa Mill, in Jandaia, Goiás, Brazil, using the CTC9001 variety. The soil in the region is a Eutrophic Red Latosol, with a pH of 5.9, and received basic fertilization with P and K at the opening of the planting furrows. A randomized complete block design was used, in a 4x5 factorial model with four replicates, consisting of four foliar products and five different rates (0 (control), 2, 4, 8, and 16 L ha-1), applied on December 10, 2021, to second-cut sugarcane. The following parameters were evaluated: number of tillers (NP), average stem diameter (DM), stem height (AC), productivity, total recoverable sugar (ATR), percentage of apparent sucrose in the broth (POL), broth purity (Purity) and fiber content (Fiber). The results showed that foliar fertilization did not influence the parameters NP, DM, AC, POL, PURITY and FIBER. On the other hand, the PROD variable showed a differentiated response according to the treatments, indicating a positive effect of the combined use of nutrients and biostimulants, with an average increase of 3 t ha⁻¹ in relation to the control, regardless of the dose applied.