Table 2 Total volatile fatty acids (VFA) and VFA profile of in vitro fermentation from Trial 1.

From: Stable isotopes provide evidence that condensed tannins from sericea lespedeza are degraded by ruminal microbes

Item

Treatmentsa

SEM

P value

0SL

50SL

100SL

L

Q

Total VFA, mM

69.7

63.3

50.2

5.76

0.031

0.081

A:Pb

3.36

3.03

3.14

0.213

0.003

0.560

VFA molar proportions, mol/100 mol

 Acetate

70.3

69.8

72.1

1.08

0.173

0.001

 Propionate

20.9

23.0

22.9

1.02

0.001

0.032

 Butyrate

6.7

5.7

3.5

0.13

 < 0.001

 < 0.001

 BCVFA

1.2

1.4

1.0

0.17

0.461

0.075

  1. SEM, standard error of the mean; L, linear effect of SL inclusion; Q, quadratic effect of SL inclusion; BCVFA, branched-chain volatile fatty acids = isobutyrate + isovalerate + 2-methylbutyrate.
  2. aSL: sericea lespedeza [Lespedeza cuneata (Dum. Cours.) G. Don]  0SL: 0% (fresh weight basis) SL hay (100% bermudagrass hay); 50SL: 50% SL hay + 50% bermudagrass hay; 100SL: 100% SL hay (0% bermudagrass hay).
  3. bAcetate:propionate ratio.
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