In vitro protein protection of protein meals using Bioprotect and tannin extract from red grape marc

Protecting crude protein in the rumen may reduce extensive protein degradation and ammonia emission and increase available bypass protein in ruminants. This experiment was conducted to determine the effect of two Bioprotect (15 and 30 mL/kg dry matter (DM)) and two tannin extract (TE) (20 and 40 g/kg DM) inclusion rates on protein protection and in vitro fermentation characteristics of canola and soybean meals incubated for 24 h using an ANKOM in vitro gas production system. The treated canola and soybean meals produced lower soluble protein (fraction ‘a’) and larger slowly degradable protein (fraction ‘b’) than its untreated counterparts, p