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Table 8 Volatile fatty acids content in manure measured based on the treatment

From: The effect of feeding high fat diet to beef cattle on manure composition and gaseous emission from a feedlot pen surface

Sampling date VFAs (mM) Treatments
control Low fat Medium fat High fat
20-Jun-13 Acetic 49.5 a* ± 3.2 51.3 a ± 3.5 46.0 a ± 1.5 46.5 a ± 4.8
Propionic 17.0 a ±2.1 17.3 a ± 2.5 20.2 a ± 4.1 19.4 a ± 4.0
Isobutyric 2.1 a ± 1.3 2.0 a ± 0.6 2.0 a ± 1.4 2.1 a ± 0.6
Butyric 24.0 a ± 2.6 21.7 a ± 3.0 25.7 a ± 3.7 23.0 a ± 1.5
Isovaleric 4.6 a ± 1.4 3.2 a ± 1.9 4.6 a ± 1.7 3.9 a ± 1.3
Valeric 2.8 a ± 3.0 4.5 a ± 1.3 1.5 a ± 1.5 5.1 a ± 1.8
  TVFA (mM) 120.7 a ± 27.6 101.7 a ± 37.4 105.1 a ± 8.6 127.1 a ± 24.2
30-Jul-13 Acetic 51.4 a ± 2.2 49.5 a ± 2.4 51.1 a ± 2.9 50.9 a ± 2.8
Propionic 23.5 a ± 1.4 19.8 a ± 3.4 21.3 a ± 3.3 19.5 a ±2.3
Isobutyric 1.4 a ± 0.3 1.5 a ± 0.4 1.7 a ± 0.6 1.7 a ± 0.2
Butyric 21.0 a ± 1.2 24.4 a ± 2.3 22.1 a ± 1.8 22.8 a ± 1.7
Isovaleric 1.3 b ± 0.3 3.5 a ± 0.5 2.2 ab ± 0.8 3.4 ab ± 0.3
Valaric 1.4 a ± 1.3 1.4 a ± 1.0 1.6 a ± 1.7 1.6 a ± 0.9
  TVFA (mM) 150.2 a ± 18.9 149.0 a ± 32.7 176.4 a ± 42.2 148.7 a ±10.9
20-Aug-13 Acetic 46.0 a ± 3.7 44.7 a ± 2.8 45.6 a ± 2.4 49.0 a ± 5.6
Propionic 25.4 a ± 1.3 25.6 a ± 3.9 24.7 a ± 2.1 22.0 a ± 3.5
Isobutyric 1.5 a ± 0.2 1.4 a ± 0.3 1.2 ab ± 0.4 0.7 b ± 3.6
Butyric 22.4 a ± 2.4 22.4 a ± 2.4 23.4 a ± 1.4 24.6 a ± 3.6
Isovaleric 1.3 a ± 0.1 1.5 a ± 0.6 1.3 a ± 0.4 0.9 a ± 0.3
Valeric 3.5 a ± 0.5 4.4 a ± 1.7 1.3 a ± 1.2 2.9 a ± 1.1
  TVFA (mM) 147.6 ab ± 34.8 178.2 a ± 19.9 142.0 ab ± 42.5 128.8 b ± 47.5
18-Sep-13 Acetic 48.9 b ± 0.6 50.8 ab ± 0.6 53.5 a ± 2.1 51.2 ab ± 2.5
Propionic 22.7 a ± 1.7 22.4 a ± 1.1 20.9 a ± 2.3 21.9 a ± 1.0
Isobutyric 1.1 a ± 0.3 0.8 a ± 0.1 1.0 a ± 0.5 1.2 a ± 0.3
Butyric 23.7 a ± 1.0 22.4 ab ± 1.8 20.6 b ± 1.6 21.3 ab ± 1.0
Isovaleric 1.0 a ± 0.3 0.8 a ± 0.2 1.0 a ± 0.5 1.2 a ± 0.2
Valeric 2.5 a ± 0.6 2.8 a ± 1.0 3.0 a ± 1.3 3.6 a ± 1.2
  TVFA (mM) 129.2 a ± 15.0 109.0 ab ± 14.4 114.5 ab ± 17.9 105.3 b ± 11.1
9-Oct-13 Acetic 53.5 a ± 0.9 49.8 b ± 0.0 51.9 ab ± 0.3 50.2 b ±0.8
Propionic 20.9 a ±0.1 20.6 a ± 0.6 20.2 a ± 1.7 22.8 a ± 0.7
Isobutyric 0.9 a ± 0.0 1.2 a ± 0.0 1.4 a ± 0.4 0.4 a ± 0.5
Butyric 21.8 a ± 0.2 23.7 a ± 0.9 21.8 a ± 0.5 24.4 a ± 1.3
Isovaleric 0.9 a ± 0.3 1.2 a ± 0.1 1.4 a ± 0.3 0.6 a ± 0.2
Valeric 1.9 a ± 0.2 3.5 a ± 1.5 3.3 a ± 1.5 1.5 a ± 1.5
  TVFA (mM) 144.5 a ± 18.4 108.8 a ± 0.5 113.5 a ± 16.2 123.1 a ±8.0
  1. *Values followed by the same letter in row are not significantly different at P ≤ 0.05