Akademik Veri Yönetim Sistemi
REVUE DE MEDECINE VETERINAIRE, cilt.161, sa.1, ss.3-9, 2010 (SCI-Expanded)
The objective of this in vitro experiment was to examine the potential effects of inulin (0, 2 and 4%) at different forage / concentrate ratio (20 / 80, 40 / 60 and 60 / 40) on rumen fermentation variables during 48h long incubation. Fermentation Of pore inulin produced lower lactate and acetate but higher propionate and butyrate than the basal Mixture leading to high total ruminal VFA concentrations. Ruminal fluid pH and NH3-N concentration linearly increased, whereas lactate concentration quadratically decreased as the forage proportion increased (P < 0.01) but these parameters were not significantly affected by the inulin addition. The total VFA concentrations quadratically decreased with increasing forage proportion and were associated with the increase of acetate proportion and the decreases of butyrate, isobutyrate and isovalerate proportions (P < 0.001 to 0.05). The inulin effect on the VFA production was dependent of the forage/concentrate ratio of the mixture (P < 0.05) but this fructan exhibited no significant effect by itself on the overall and specific ruminal VFA formation. The total gas production mainly produced front insoluble but slowly fermentable portion of the mixture linearly decreased as forage proportion increased (P < 0.001) whereas it linearly increased with increasing inulin dosage (P < 0.01). In conclusion, the inulin addition exerts only minimal modifier effect on rumen fermentation.