The objective ofthis research was to evaluate swine slurry (SS) application on the agronomicand bromatologic characteristics of marandugrass. The following response variableswere determined: DM productivity, tillering, concentrations of DM, CP, NDF,and ADF, and in vitro DM digestibility (IVDMD). It was used a randomized blockdesign with nine treatments (fertilization) and four replications. Treatmentswere described as follows: T1 (liming); T2 (chemical fertilization 100,40 e 60 kg/ha of N P2O5 K2O); T3 (180 m³/haof SS 1x/year - fermented for 45 days); T4 (180 m³/ha of SS 2x/year); T5(180 m³/ha of SS 3x/year); T6 (180 m³/ha of SS 4x/year); T7 (180 m³/haof SS 5x/year); T8 (180 m³/ha of SS 1x/year - in natura); T9 (control).Means were compared using the Scott-Knott test. The liming was accomplishedapplying three metric tons of dolomitic limestone. Sources of nutrients in thechemical fertilization included ammonium sulphate, single superphosphate, andpotassium chloride. Cuts were performed every 45 days. A single applicationof swine slurry (SS) promoted greater number of tillers/m2, greaterDM accumulation, and better forage nutritive value for initial harvestings.Greater values of CP were found in treatments 3, 4, 8, and 9 during initialharvestings. The CP means ranged from 9.6 to 13.7%. The NDF concentration wasgreater at the second cut and NDF means ranged from 61.4 to 68.6%. The ADF concentrationwas lower at the first cut when SS was applied twice and five times per year.The ADF means ranged from 21.2 to 23.4%. The greatest IVDMD occurred at thefirst cut in treatments 3, 4 and 8 and IVDMD means ranged from 69.0 to 71.8%.
