Instestinal Digestibility Of Feed Protein For Ruminant Determined By The Mobile Nylon Bag Technique And Three-Step In Vitro Procedure

Rumen degradability of 11 feeds protein for ruminant was determined by nylon bag procedure. RUP instestinal digestibility of 11 feeds for ruminant was determined by the mobile nylon bag technique (MNBT) and three-step in vitro procedure. Factors including porosity of nylon bag, post-rumen sample quantity put in nylon bag, and rumen retention time that affect the MNBT were studied.1 Rumen efficiency degradability of CP of Corn Gluten Meal (CGM), soybean Meal (SBM), Cottonseed Meal-solvent (CMS), Rapseed Meal- solvent (RMS), Distillers Dried Grains with Solubles (DDGS), Peanut meal-expeller (PME), Corn Germ Meal (CGM), Beer Dregs (BD), Maize, Wheat Bran (WB), Rice Bran (RB), were 17.84%, 52.19%, 50.23%, 49.96%, 27.95%, 45.52%, 51.27%, 59.82%, 36.78%, 75.92%, and 67.73%, respectively.2 Porosity of nylon bag material used in the MNBT was 42μm, post-rumen sample quantity put in nylon bag used in the MNBT was 1.0 g, and rumen retention time was 16 h.3 RUP instestinal digestibilities of CGM, SBM, CMS, RMS, DDGS, PME, CGM, BD, Maize, WB, RB determined by the MNBT, were 90.60%, 96.21%, 81.90%, 82.31%,. 90.42%, 95.46%, 79.14%, 74.39%, 89.86%, 68.51%, and 58.65%, respectively.4 RUP instestinal digestibility of CGM, SBM, CMS, RMS, DDGS, PME, CGM, BD, Maize, WB, RB determined by the three- step in vitro procedure, were 90.60%, 96.21%, 81.90%, 82.31%, 90.42%, 95.46%, 79.14%, 74.39%, 89.86%, 68.51%, and 58.65%, respectively.5 The results of the three- step in vitro procedure with those of the MNBT had a good correlation (r=0.81).