The objective of this work was to evaluate organic fertilizer (bird manure) in the production and nutritional quality of grass Urochhloa brizantha cv Paiaguás during the rainy season in East Panama. Four, three and two cuts were made every 30, 40 and 50 days, applied with a single urea fertilization, to the grass Urochhloa brizantha cv. Paiaguás, in a randomized complete block experimental design in divided plots with four replications to evaluate behavior and yield, leaf-stem ratio of Urochhloa brizantha cv. Paiaguás. Cutting frequencies did not significantly affect the dry matter content of Urochhloa brizantha cv. Paiaguás both in the leaf and stem portion. For the leaf and stem portion, the dry matter yields did not differ significantly, however, they increased as the cutting intervals increased. In the yield of dry matter (kg/ha) according to days of cutting in the different cutting frequencies, significant differences were only presented when cuts were made at 30 days. Crude protein in both portions did not detect significant differences as a result of the three cutoff frequencies. In the leaf and stem portion, the highest crude protein contents were found in the lowest cut frequencies studied. The effect of cutting frequencies of 30, 40 and 50 days on phosphorus content did not show significant differences in the leaf and stem portions. For the leaf portion in the calcium content, it was observed that there were no significant differences due to the effect of the cutting frequencies. In the stem portion there was a significant difference in the intervals of evaluated cuts. There was no significant effect between the frequencies of cuts at 30, 40 and 50 days in both the leaf and stem portions in the variable potassium content (%).