The study was conducted to evaluate the effects of ginger (Zingiber officinale) and turmeric (Curcuma longa) mix supplementation on chemical composition, anti-nutritional factors, in vitro total gas characteristics and methane reduction potential. Six goats fed a mixed diet of Pannicum maximum (60% DM) and standard concentrates (40% DM) for 14 days were used as sources of inoculum. Treatments were T1 (Concentrate diet), T2 (concentrate diet + 1g/kg ginger), T3 (concentrate diet + 1g/kg turmeric powder), T4 (concentrate diet + 0.5g/kg ginger powder + 0.5g/kg turmeric powder). There were significant differences (P < 0.05) in all the nutrients evaluated except crude protein. Non-fibre carbohydrate (NFC) was highest (19.56% DM) in T3 (Concentrate diet + 1g/kg turmeric powder) and lowest in T1 (concentrate diet). Condensed tannins (CT) and saponins were higher in T4 (4.68 and 2.32 % DM) respectively, while the lowest CTs and saponnins were obtained for T1. The total gas production (GP24) steadily increased and was most pronounced (P<.0.05) in T3 (27.00 mL/200mg DM). Methane reduction potential (18%), organic matter digestibility (52.11%) and microbial protein supply (10.06%) were also highest (P<.0.05) in T3 relative to other diets. The findings revealed either ginger or turmeric and their combination in total meal ration supplementation maintained CT and saponins within acceptable limits, improved degradability (%DM) and methane reduction potential, qualifying them as suitable phytogenic feed additives for ruminants.
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