Study of Chemical Composition, Quality and Ruminal Degradability Parameters of Silaged Orange Pulp with Wheat Straw and Urea

The experiment was carried out to evaluate the effect of wheat straw and urea additives on chemical composition, quality characteristics and ruminal degradability parameters of dry matter, neutral detergent insoluble fiber and crude protein orange pulp silage, in a completely randomized design, using nylon bag technique in the form of fore treatments (citrus pulp 1. without additive, 2. with 40% wheat straw, 3. with 38.5% wheat straw and 1.5 % urea, 4. with 37% wheat straw and 3% urea). Results showed that treatment 2 had the highest score on visual assessment of silage. Treatment 1 and 4 had the lowest (3.53) and highest (4.36) pH respectively. Adding wheat straw to orange pulp increased dry matter (DM), ash and neutral detergent fiber (NDF), decreased non fiber carbohydrate (NFC) and ether extract. Urea increased crude protein, pH and NH3-N contents and decreased NFC. Flight point in treatments 1, 2, 3 and 4 were 90.72, 113.64, 94.54 and 82.75, respectively. Treatment 1 had the highest dry matter,s a, b and a. Adding wheat straw and urea significantly decreased dry matter degradability compared to the control treatment. Treatment 2 had the lowest protein,s a and a but adding wheat straw decreased protein degradability. Treatments 1 and 3 and treatment 2 had the highest and lowest NDF,s a respectively, treatment 3 and treatments 1 had the highest and lowest NDF,s b and a therefore additives increased NDF degradability. The results showed that with mixture of orange pulp, wheat straw and urea, can be prepared high quality silage; but through increasing urea more than 1/5 %, for improving the quality of silage soluble carbohydrate source is required. So, with increasing the urea the level of citrus pulp should be increased.