The effect of green tea waste extract on ruminal degradability and intestinal digestibility of barley grain

Abstract

This study was conducted to investigate the effects of different levels of green tea waste extract (GE) on ruminal degradabilityand intestinal digestibility of dry matter (DM), crude protein (CP), and starch of barley grain. Therefore, barley grain was treated with 0as control, and 5%, 10%, 15%, and 20% of GE. The potential of DM degradability (a + b) of barley grain treated with 15% and 20% of GEwas significantly lower compared to other treatments (Linear [L] P < 0.05). The lowest (a + b) fraction of CP degradability was found inthe barley grain treated with 20% GE (L P < 0.05). The (a + b) fraction and effective degradability of starch in barley grain treated with15% and 20% of GE were significantly lower than those in other treatments (L and quadratic [Q] P < 0.05). The highest intestinal DM,CP, and starch digestibility were associated with barley grain treated with 10% GE (L and Q P < 0.05). Based on recent results, processingbarley grain with GE leads to a decrease of DM, CP, and starch degradability. The treatment of 10% GE improved intestinal digestibilityof the aforementioned nutrients; therefore, it can be used to protect barley grain against ruminal degradability