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| The aim of this study was to investigate the effect of ammonia and fermentation treatment on Cymbopogon nardus L. waste as a substitute for Pennisetum purpureum grass on the nutritional profile and macronutrient digestibility under in vitro conditions. Seven rations (3 replications) were formed CN0 (100% P. purpureum), ACN1 (25% ammoniated C. nardus + 75% P. purpureum), ACN2 (50% ammoniated C. nardus + 50% P. purpureum), ACN3 (100% ammoniated C. nardus), FCN1 (25% fermented C. nardus + 75% P. purpureum), FCN2 (50% fermented C. nardus + 50% P. purpureum), and FCN3 (100% fermented C. nardus). A completely randomized design was used in this study and data integration was done using analysis of variance with posthoc Tukey’s test. The results obtained show that the nutritional profiles of ACN1 and FCN1 were slightly different from CN0. In vitro digestibility (%) of dry matter (IVDMD) and organic matter (IVOMD) after 48 h of incubation showed high significant differences (P < 0.001) among the treatments. There was no significant difference (P > 0.05) between CN0, ACN1 and FCN1 on digestibility of CP (IVCPD), NDF (IVNDFD), ADF (IVADFD) and cellulose (IVCLD). In conclusion, ammonia and fermentation treatment on C. nardus waste can be utilized as a substitute for P. purpureum at a level of 25% in a ruminant ration.

journal of animal health and production

Ammonia and Fermentation Treatment of Cymbopogon nardus L. Waste as a Substitution of Grass: Effect on Nutritional Profile and Ruminal in vitro Digestibility