Study on rumen degradability characteristics of baled total mixed ration

Two dairy cows fitted with rumen cannulas were selected to study the effect of baled ensiling, concentrate to forage ratio (C/F), and moisture content on rumen degradibility characteristics of total mixed ration (TMR) using rumen nylon bag method. The results showed that baled ensiling increased dry matter (DM),crude protein (CP) and neutral degradation fiber (NDF) rumen disappearance and effective degradability of TMR (P0.05). Rumen disappearance rate and effective degradability of DM and CP increased with concentrate content of TMR increasing (P0.05).Compared with 40% and 50% moisture groups, effective degradability of CP were higher (P0.05) in 60% moisture, while no difference was observed between 40% and 50% moisture groups. It indicated that the baled ensiling could increase rumen disappearance and effective degradability of TMR nutrients（P0.05）.Along with the increase of C/F, rumen nutrient disappearance and effective degradability increased（P0.05）, and the effects of moisture content were varied on rumen disappearance and effective degradability of different TMR nutrients.