49, total VFA concentration of ~ 107 mM with ~ 17% of butyrate and a weak concentration of lactate

(3.4 mM; Table 3), in agreement with previous reports of butyric SARA [13, 40, 43]. Regarding the see more microbial composition and activities (Figure 3), total and cellulolytic bacteria and protozoa were not affected by probiotic supplementation. Feeding Lp + P and Lr + P NSC23766 nmr resulted in lower S. bovis and Prevotella spp. proportion (P < 0.05), while the decrease in Lactobacillus spp. proportion almost reached significance in P-fed wethers (P = 0.06). The treatment Lp + P reduced both total (data not shown) and specific amylase activities and increased specific xylanase activity (P < 0.05), whereas specific amylase selleck activity was numerically lower in wethers fed with Lr + P. These moderate microbiological shifts were accompanied by some changes in the fermentation patterns. Wethers supplemented with Lp + P and Lr + P had a higher pH nadir compared with C (+ 0.46 pH units; P < 0.05), but only Lp + P had higher mean ruminal

pH (+ 0.25 pH units, P < 0.05). The rise in pH was associated with a decrease in total VFA concentration (− 24%, P < 0.05), and butyrate proportion (P < 0.05) and an increase in acetate and minor VFAs (P < 0.05). Feeding P also reduced total VFAs (P < 0.05), and numerically changed individual VFAs proportions as did Lr + P. However, neither probiotic significantly affected mean ruminal pH. Figure 3 Effects of bacterial probiotic supplementation on the rumen microbial parameters during corn-induced butyric subacute acidosis. Acidosis was induced during 3 consecutive days. Protozoa, bacteria and polysaccharidase activities were quantified 3 h after acidosis induction on day 3. Bacterial species are expressed as % of total bacteria per gram of dry matter (DM). Polysaccharidase

activities are expressed as μmol of reducing sugar/mg protein/h. The treatments were identified as C = control without probiotic; P = Propionibacterium P63; Lp + P = L. plantarum + P63; Lr + P = L. rhamnosus + P63. Each single point is a mean of 4 data points from the 4-period Latin square. Error bars represent standard error of the means. Probiotic treatments that significantly differ from control are indicated by * for P ≤ 0.05. Figure 4 Effects of bacterial probiotic supplementation on Ribonucleotide reductase the rumen microbial parameters during beet pulp-induced propionic subacute acidosis. Acidosis was induced during 3 consecutive days. Protozoa, bacteria and polysaccharidase activities were quantified 3 h after acidosis induction on day 3. Bacterial species are expressed as % of total bacteria per gram of dry matter (DM). Polysaccharidase activities are expressed as μmol of reducing sugar/mg protein/h. The treatments were identified as C = control without probiotic; P = Propionibacterium P63; Lp + P = L. plantarum + P63; Lr + P = L. rhamnosus + P63.