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

Morteza REZAIE,Mohammad NASEHI,Taghi GHOORCHI,Nor Mohammad TORBATINEJAD

doi:10.3906/vet-1806-52

Abstract

This study was conducted to investigate the effects of different levels of green tea waste extract (GE) on ruminal degradability and intestinal digestibility of dry matter (DM), crude protein (CP), and starch of barley grain. Therefore, barley grain was treated with 0 as 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 GE was significantly lower compared to other treatments (Linear [L] P < 0.05). The lowest (a + b) fraction of CP degradability was found in the barley grain treated with 20% GE (L P < 0.05). The (a + b) fraction and effective degradability of starch in barley grain treated with 15% 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, processing barley grain with GE leads to a decrease of DM, CP, and starch degradability. The treatment of 10% GE improved intestinal digestibility of the aforementioned nutrients; therefore, it can be used to protect barley grain against ruminal degradability.

Highlights

In many parts of the world, barley grain (BG) is one of the main components of the concentrated elements of ruminant rations [1]
The highest fraction (a) of dry matter (DM) was that for 0GEBG; there was no significant difference compared to the 15GEBG group (Table 4)
Ruminal degradability The results of the present study indicate that green tea waste extract (GE) reduced the ruminal degradability of DM, crude protein (CP), and starch of BG

Summary

Introduction

In many parts of the world, barley grain (BG) is one of the main components of the concentrated elements of ruminant rations [1]. Many different processing methods, such as heating [5] and the use of formaldehyde [6], have been applied to protect proteins from ruminal degradation and to allow proteins to bypass the rumen to other digestive tract sectors. These processing methods may reduce intestine bioavailability of some amino acids like lysine, cysteine, tyrosine, and leucine [7,5]. Only a small amount of this starch enters the small intestine, which increases the risk of producing ruminal acidosis in livestock in whose diet a large amount of BG has been used. In the form of protected granules joined to proteins, is capable of establishing covalent bonds with aldehyde compounds due to their free amino acid groups; processing

Methods

Results

Conclusion