PS2-26. Intestinal and Total Track Organic Matter Digestion of Newly Developed Value-added Blended Fat Stimulated Feed Product in Ruminants in Comparison with Commercial Protein and Energy Feeds.

Abstract The objectives of this study were to compare commercial protein and energy products with the newly developed value-added blended fat stimulated feed product (BFSFP) on intestinal and total track organic matter digestion in ruminants. Three-batches samples of the newly developed value-added blended fat stimulated feed products BFSFP1, BFSFP2 and BFSFP3 were developed. The only difference among the three BFSFP tested was batch. Three samples of barley grain (n = 3) and canola meal (n = 3) were obtained from Canadian Feed Research Center (CFRC, University of Saskatchewan, Canada). Intestinal and total track organic matter digestion in lactating dairy cattle were determined using three-step approach. The treatment design was a one-way structure with three feed treatment levels (i = 1 (BFSFP), 2 (Barley), 3 (canola meal). The experimental design was a Randomized Complete Block Design (RCBD) with the feed treatments as a fixed effect (i = 1 (BFSFP, n = 3), 2 (Barley, n = 3), 3 (canola meal, n = 3) and the experimental runs as a random block effect. The results showed that compared with commercially available energy-rich and protein-rich feeds, the newly developed BFSFP was lower in the intestinal digestibility of rumen bypass OM (%dBOM) than protein rich feed of canola meal and but higher than energy rich feed of barley grain (53.0% vs. 60.0% vs. 44.5%, P < 0.01). It also had higher the intestinal digestible rumen bypass OM content (IDBOM) than barley grain (227 vs. 173 g/kg DM, P < 0.01) but higher than the protein rich feed of canola meal (256 g/kg DM). For total tract digestible OM (TDOM in g/kg DM), the newly developed BFSFP was lower (P < 0.01) than canola meal but higher (P < 0.01) than barley grain (738 vs. 757 vs. 763 g/kg DM, respectively). In conclusion, the BFSFP differs in intestinal and total track organic matter digestion compared to the commercially available energy-rich and protein-rich feeds.