TABLE 1

Chemical properties in the pit mud

VariableValues for cellar of age (yr)a:
1102550
pH3.57 ± 0.06a5.00 ± 0.78ac5.51 ± 0.64bc5.81 ± 0.33bc
NH4+ (g kg−1)1.86 ± 0.06a2.70 ± 0.47ac4.21 ± 0.67b3.55 ± 0.68bc
Moisture (%)43.3 ± 1.9a44.5 ± 2.9a45.1 ± 2.5a44.1 ± 5.0a
Humic matter (%)30.1 ± 3.6a26.4 ± 1.2a24.9 ± 7.3a21.4 ± 5.6b
TN (%)16.0 ± 0.6a16.8 ± 2.0a18.1 ± 2.1a16.2 ± 1.7a
Acetic acid (g kg−1)4.13 ± 0.63a2.94 ± 0.70a4.37 ± 0.98a3.98 ± 0.86a
Butyric acid (g kg−1)2.89 ± 0.20a1.77 ± 0.1b2.02 ± 0.63b1.63 ± 0.24b
Caproic acid (g kg−1)5.79 ± 0.72a6.51 ± 3.35a20.0 ± 8.66b15.2 ± 7.7b
Lactic acid (g kg−1)166.5 ± 12.5a59.1 ± 21.3b26.2 ± 10.3b29.8 ± 4.5b
  • a All data are presented as means ± standard deviations (n = 5). Values with different letters in a row mean significant differences at P < 0.05 as determined by ANOVA.