nfluence of Treated Wheat Bran, with Effective Microorganisms- on an In vitro Digestibility and In sacco Degradability of a Mixed Ration

Abstract

This study assessed the impacts of including a treated wheat bran, with effective
microorganisms (EMWB), in a mixed diet on the chemical composition, in vitro
digestibility, and in sacco degradability of the dry matter (DM) and crude protein
(CP). The treatment consisted of 70% native pasture hay (NPH) and 30% concentrate
mixtures (wheat bran (35%), maize (20%), rice bran (21%), molasses (3%), niger
seedcake (4%), sunflower cake (11%), salt (3%), and limestone (3%)). This
concentrate mixture was substituted with different levels (0, 33, 66 and 100%) of
treated wheat bran forT1, T2, T3 and T4, respectively. The CP content was increased
(7.2, 9.1, 9.2 and 12.2% DM (SEM = 0.214), while the neutral detergent fiber (NDF)
content was decreased with an increasing level of EMWB (66.2, 64.3, 63.7 and 62.1
% DM (SEM = 0.117) for T1, T2, T3 and T4 respectively). Similarly, the contents of
both acid detergent fiber (ADF) and acid detergent lignin (ADL) showed a declining
trend with an increasing EMWB in the diet. The in vitro DM digestibility (IVDMD)
was in the order of T4 > T3 > T2 > T1 (54.9, 56.2, 59.7 and 74.4% (SEM = 0.169),
respectively. An inclusion of EMWB, in the diet enabled to improve the rapidly
degradable (a) and insoluble but potentially soluble (b) fractions of the diets.
Furthermore, the in sacco potential (PD) and effective degradability (ED) of DM and
CP increased with increasing levels of EMWB in the diet. The PD and ED for DM
ranged from 55 to 70% and 37 to 48%, respectively. Similarly, the PD and ED for
CP ranged 25 to 48% and 16 to 22%, respectively. The treatments with EMWB for
example T4 showed the most significant impact on enhancing the nutritive values and
degradability. Consequently, EMWB can completely substitute a commercial
concentrate mixture used in the current study, yielding better results.