This experiment was conducted to determine the effects of different levels of enzyme on the chemical composition and fermentational properties of citrus pulp silage. In this experiment, the whole citrus pulp was manually chopped (3-4 cm length) and used as untreated or treated with enzyme for 0.1, 0.4, 1 g/kg fresh citrus pulp. The enzyme was a mix of several enzymes (Cellulase, Xylanase, Beta-glucanase, Pectinase, Phytase, and Alpha-amylase). Treatments were ensiled under anaerobic conditions for 6 weeks. Each treatment had 4 replicates. After 42 days, trial silages were evaluated for chemical composition and fermentational properties (pH and NH3-N concentration) and quality of silage estimated through the calculation of flieg point. The data was analyzed by SAS (2004) program and Proc GLM in a completely randomizing design. Means were separated by Duncan test at 0.05 probability level. There were no significant differences among treatments for DM%, EE, and NH3N (p>0.05). There were significant differences among treatments for NDF, ADF, Ash, pH, and quality (p<0.05). The control treatment had the best quality. This study showed that adding enzyme to citrus pulp silage decreases the NDF and ADF content of citrus pulp silage.

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