Approximately 70% of cultivated pastures in Brazil belong to the genus Urochloa, and most of these areas have some degree of degradation. The objective was to evaluate the productive potential of forage Urochloa Brizantha cv. Marandu in tropical conditions and under different levels of intensification via soil amendment. The experiment was conducted at the Federal University North of Tocantins (UFNT), University campus of Araguaína/TO, at the School of Veterinary Medicine and Zootechnics at the Nucleus for the Study of Ruminant Production in the Legal Amazon (NEPRAL). The experimental design was in randomized blocks, to evaluate four levels of fertilization intensification, with three replications, totaling 12 experimental units. At the beginning of the experiment, correction of the soil in the area was carried out, and soon after the reaction of the limestone and gypsum, the Marandu grass was established, as well as the phosphate fertilization with simple superphosphate at a dose of 40 kg / ha of P2O5 in all installments. After 30 days of sowing, a topdressing fertilization of 40 kg/ha of N and K2O was carried out via fertilizer formulated at 20:0:20 in all experimental plots. The criterion for cutting was according to the height of the forage, leaving a residue 50% plant height. The agronomic evaluations were carried out at the time of cutting, the harvested forage was separated from each component, each fraction was weighed separately and taken to the greenhouse, to determine the MST of the components. The data obtained were subjected to normality and homogeneity tests, followed by analysis of variance. For the structural components, there was no statistical difference in the structural variables of the treatments. There was a statistical difference in the DM of the components, in which an increase was observed in the low treatment. The best fertilization management for this work was not determined.
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