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Table 4 Effects of CO2 and temperature treatments on in vitro VFA at 24 and 48 h of wheat straw

From: The effect of increased atmospheric temperature and CO2 concentration during crop growth on the chemical composition and in vitro rumen fermentation characteristics of wheat straw

Index, mmol/L Time, h CK CO2 TEM CO2 + TEM S.E.M P- Value2
TVFA1 24 17.52 ± 0.17a 15.04 ± 0.02b 16.90 ± 0.38a 12.42 ± 0.23c 0.63 *
48 38.83 ± 1.96a 34.95 ± 0.30ab 37.11 ± 1.41a 32.50 ± 1.07b 0.91 *
Acetate 24 11.10 ± 0.29a 9.18 ± 0.23b 10.32 ± 0.30a 6.95 ± 0.07c 0.52 *
48 23.97 ± 0.94a 21.17 ± 0.45bc 22.23 ± 0.73ab 19.17 ± 0.63c 0.61 *
Propionate 24 4.94 ± 0.14 4.54 ± 0.26 5.12 ± 0.47 4.19 ± 0.32 0.17 ns
48 11.37 ± 0.61 10.65 ± 0.19 11.42 ± 0.53 10.24 ± 0.41 0.25 ns
Butyrate 24 1.33 ± 0.12 1.14 ± 0.03 1.25 ± 0.11 1.10 ± 0.08 0.07 ns
48 2.98 ± 0.37 2.49 ± 0.07 2.81 ± 0.20 2.43 ± 0.11 0.12 ns
Acetate : propionate 24 2.25 ± 0.10 2.04 ± 0.18 2.06 ± 0.25 1.68 ± 0.13 0.1 ns
48 2.11 ± 0.04 1.99 ± 0.06 1.95 ± 0.06 1.88 ± 0.05 0.03 ns
  1. a,b,c Values within a column with different superscript letters are significantly different (P < 0.05)
  2. 1VFA: volatile fatty acid. 2ns = non-significant (P > 0.05), * = significant (P < 0.05)