Table 1 Digesta pH and concentration of SCFA (mmol/kg wet sample) in Co2 and Co3

Co2

 pH

6.0 (5.75–6.36)

6.0 (5.64–6.31)

6.20 (6.02–6.48)

 SCFA²

118 (96.9–145)

112 (91.1–137)

111 (93.9–131)

 Butyrate

15.1 (10.0–22.7) ^b

10.0 (6.55–15.3) ^ab

9.60 (6.86–13.5) ^a

 Propionate

29.2 (22.6–37.8)

28.2 (21.7–36.7)

28.0 (22.5–34.9)

 Acetate

69.1 (58.5–81.7)

69.1 (58.4–81.8)

70.9 (63.0–80.3)

 Valerate

3.50 (1.80–6.81)

3.10 (1.53–6.18)

2.1 (1.17–3.79)

 Iso-acids

1.70 (1–2.8) ^b

0.70 (0.42–1.22) ^a

1.0 (0.63–1.58) ^a

Co3

 pH

6.40 (6.04–6.69)

6.30 (5.90–6.74)

6.40 (6.18–6.61)

 SCFA

108 (88.0–131.5)

96.3 (76.6–121)

101 (85.6–119)

 Butyrate

13.6 (9.03–20.6) ^b

7.40 (4.60–11.9)^a

8.60 (6.19–12.0) ^a

 Propionate

23.6 (18.2–30.5)

22.0 (16.4–29.5)

23.8 (19.2–29.5)

 Acetate

65.0 (54.9–77.0)

63.6 (52.1–77.6)

66.2 (58.6–74.8)

 Valerate

3.20 (1.66–6.32) ^b

1.70 (0.79–3.70) ^ab

1.80 (1.02–3.27) ^a

 Iso-acids

2.30 (1.39–3.96) ^c

0.70 (0.39–1.30) ^a

1.20 (0.77–1.90) ^b