Effects of Exogenous Fibrolytic Enzyme Derived from Trichoderma reesei on Rumen Degradation Characteristics and Degradability of Low-Tannin Whole Plant Faba Bean Silage in Dairy Cows

The objectives of this study were to (1) determine the effect exogenous fibrolytic enzyme derived from Trichoderma reesei on dry matter (DM) and neutral detergent fibre (NDF) degradability whole plant faba bean silage (Snowbird), (2) evaluate effects (FETR) DM NDF degradation kinetics silage, (3) compare difference between in vitro approach (DaisyII incubation method) situ assay-biological (nylon bag technique) determination (DMD) (NDFD). was a mixture xylanase cellulase. treated with seven doses enzyme, 0 as control 0.25, 0.5, 0.75, 1, 1.25 1.5 mL FETR/kg silage. results obtained method show that cubically (p < 0.05) affected DMD quadratically 0.01) NDFD increasing level application. In by dosage enzyme. Correlation analysis DaisyII showed strong correlation (r = 0.98, p overall also satisfactory relationship 0.84, found NDFD. application great impact rumen decreasing undegradable fraction potential degradable effective content fiber. washable (W) (D) linearly increased treatments. Therefore, decreased Both bypass (BNDF) (EDNDF) conclusion, highly impacted characteristics could be used improve digestion dairy cows.