Skip to main content

Table 2 Effect of diet (D) and period (P) on volatile fatty acid (VFA) levelsa in rumen fluid

From: Examination of the molecular control of ruminal epithelial function in response to dietary restriction and subsequent compensatory growth in cattle

  RES ADLIB Significance
Period 1 Period 2 Period 1 Period 2 SEMb D P D*Pc
Molar Proportions, mmol/L VFA
Acetic Acid 60.9 67.79 52.14 77.57 6.875 0.942 0.024 0.186
Propionic Acid 13.98 28.44 20.1 34.75 2.506 0.018 <0.001 0.968
N-Butyric Acid 10.5 11.09 6.02 13.84 1.895 0.653 0.033 0.064
Iso-Butyric Acid 1.84 0.15 1.1 0.54 0.202 0.351 <0.001 0.562
N-Valeric Acid 0.88 2.18 1.38 2.87 0.261 0.029 <0.001 0.708
Iso-Valeric Acid 2.31 1.55 2.31 1.97 0.244 0.386 0.029 0.388
Total, mmol/L VFA 90.42 111.18 83.04 131.55 9.831 0.513 0.001 0.167
Acetate:Propionate Ratio 4.4 2.4 2.6 2.2     
  1. aRuminal fluid samples were taken from 5 different points within the rumen of each bull at slaughter and VFA levels were measured using an automated gas chromatograph
  2. bSEM, standard error of the mean
  3. cD*P, diet × period interaction