a decreasing trendP < 0.05
All 3 silages showed a decreasing trend in the CH 4 production, CH 4 to total gas ratio, acetate to propionate, acetate, and butyrate concentrations ( P < 0.05), whereas the CH 4 production, CH 4 to total gas ratio, and butyrate concentrations in both bacteriocin-producing strain-treated silages were lower than those in the MTD/1 treated silage.