The effect of varying levels of purified condensed tannins on performance, blood profile, meat quality and methane emission in male Bapedi sheep fed grass hay and pellet-based diet

Abstract

This study determined the effect of purified condensed tannin inclusion levels in a diet on production, haematological indices, blood biochemical components, meat quality and methane emission by yearling indigenous male Bapedi sheep on a grass hay and sheep pellet-based diet in a 28-day trial. The diets contained similar (P > 0.05) nutrients but with different (P < 0.05) purified condensed tannin supplementation levels. A complete randomized design was used. Twenty-four yearling male Bapedi sheep were assigned to four dietary treatments having different purified condensed tannin levels of 0 (GH80P20PCT0), 30 (GH80P20PCT30), 40 (GH80P20PCT40) and 50 (GH80P20PCT50) g/kg DM. A quadratic type of equation was also used to determine condensed tannin supplementation levels for optimal performance and methane emission reduction by sheep. Supplementing diets with purified condensed tannins did not affect (P > 0.05) diet intake, digestibility and live weight gain of male Bapedi sheep. Supplementing diets with purified condensed tannins did not affect (P > 0.05) blood components of male Bapedi sheep. Inclusion of condensed tannins in the diets did not affect (P > 0.05) Bapedi sheep meat pH and sensory attributes. However, supplementing diets with purified condensed tannins decreased (P < 0.05) methane emission by 51 to 60%. A 49.08 g supplementation level with purified condensed tannins per kg DM diet was calculated, with the use of quadratic equations, to result in the lowest methane emission by male Bapedi sheep. The meat of male Bapedi rams on diets containing 30, 40 or 50 g of purified condensed tannins per kg DM contained higher (P < 0.05) antioxidant activities than those from rams fed a diet without purified condensed tannins. These results indicate that purified condensed tannin supplementation levels of 0, 30, 40 or 50 g/kg DM diet had no adverse effects on growth performance, blood profiles and meat sensory attributes of male Bapedi sheep. However, supplementation levels of 30, 40 or 50 g of purified condensed tannins per kg DM diet reduced methane emission by 51 to 60%, and increased sheep meat antioxidant activity values. Supplementing diets with purified condensed tannins has the potential to reduce methane production and emission by sheep. However, long-term studies are recommended to ascertain the present findings.

— Invited Review — Translational gut microbiome research for strategies to improve beef cattle production sustainability and meat quality

“…Nutrient treatments (nitrate and lipid) that reduced methane emissions also did not adversely affect meat qualities such as tenderness, juiciness and so on [ 65 ]. Similary, tannins, known to have antioxidant properties, reduced methane emissions in sheep, but had no effect on Bapedi ram meat sensory attributes [ 66 ]. Mulberry supplementation has been reported to affect the meat quality.…”

Improving Shelf Life and Content of Unsaturated Fatty Acids in Meat of Lambs Fed a Diet Supplemented with Grape Dregs

“…However, Yagoubi et al [24] have previously reported that the dressing percentage and net meat percentage of Dorper and Small-Tailed Han F1 hybrid lambs were 49% and 80%, respectively, which were higher than those observed in this work. It was also found that the carcass weight decreased substantially when the sheep were fed diets containing tannins [25], and it was inferred that the thin carcass of sheep could be due to an improved protein content of carcass. Nevertheless Priolo et al [26] hypothesized that feeding tannins to lambs could lead to malnutrition of lambs.…”

RUMEN METHANE PRODUCTION AND ITS REDUCTION USING NUTRITIONAL FACTORS (review)

“…Эффект подавления выделения этого газа за счет ВМР связан в основном с антимикробными свойствами ВМР (80). Растения производят множество вторичных соединений, среди которых большое внимание уделялось конденсированным дубильным веществам (81,82) и сапонинам (83). Три основных растительных соединения, эффективных для снижения выбросов метана in vitro, -это конденсированные дубильные вещества, сапонины и эфирные масла (84).…”