Determination of Chemical Composition and Dry Matter Degradation of Canola Straw by in situ Technique

This study was carried out to determine the chemical composition and ruminal degradability of canola Straw (CS). Samples were collected from several canola straw threshing farms in Moghan, Iran. Chemical composition for Dry Matter (DM), Crude Protein (CP), Organic Matter (OM), Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF) and Non-fibrous carbohydrate (NFC) of pooled samples were 93.33, 3.41, 25.3, 81.6, 62, and 9.1%, respectively. Degradation procedure was performed using nylon bags filled with 5 g of CS and suspended in the rumen of three fistulated Gezel rams for 0, 2, 4, 8, 16, 24, 48, 72 and 96 h and obtained data were fitted to a non-linear degradation model to calculate ruminal degradation characteristics. Results showed that soluble fraction (a) of CS were very low, especially in case of DM. Potential degradability (a + b) and effective degradability (Out flow rate 0.02h-1) were of CS for DM 23.4and 16.6, respectively. It is conclude that, CS has low DM degradability in the rumen. In this study, the nutrient composition of canola straw commonly grown or produced in mogan, iran. The results should help us better understand the nutrition potential of canola straw and provide basic information in ruminant feeding.