1:20 PM - 1:30 PM
[III-20-17] Dietary Grains and Condensed Tannin Interact on Goat Rumen and Blood OBCFA: Variations in Ruminal Precursors Made the Difference
This experiment was carried out to test the interactions of dietary grains and condensed tannin (CT) on the rumen and plasma OBCFA of goats. A 2 × 2 treatment with 2 grains (corn or barley) and 2 CT levels (0 or 2% wt/wt) was applied and resulted in 4 diets. Then diets were tested using eight Japanese Shiba × Saanen goats allocated in a replicated 4 × 4 Latin square design. The results showed that CT inclusion induced lower ADFom and aNDFom, but higher fat digestibility in BA than CN (P < 0.01). Inclusion of CT induced lower butyrate, valerate, iso-butyrate but higher iso-valerate in BA compared with CN (P < 0.05), and CT reduced isoleucine, leucin, valine and total branched-chain amino acids (P < 0.05) only in BA but not in CN. The interaction between grain and CT was not significant on amylolytic and cellulolytic microbial flora (P > 0.05). In the rumen, lower C15:0, iso-C17:0, C17:0, total OCFA and OBCFA (P < 0.01) in BA than CN after CT inclusion was observed. In the plasma. Inclusion of CT increased anteiso-C15:0 and iso-C17:0 in BA (P < 0.01). In summary, grains and CT interacted differently on rumen and plasma OBCFA, but only exert beneficial effect in plasma of CN.