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Table 6 Effect of dietary characteristics and xylanase addition on fecal SCFA in growing pigs1

From: Oat bran and wheat bran impact net energy by shaping microbial communities and fermentation products in pigs fed diets with or without xylanase

Item2

Xylanase-free diets

Xylanase supplementation diets

SEM

P-value

Basal diet

36% OB

27% WB

15% OB

12% WB

Basal diet

36% OB

27% WB

15% OB

12% WB

Diet

Xylanase

D×X3

Acetate

0.68e

1.23cde

2.22ab

1.24cde

1.59cd

1.07de

1.66bcd

1.73bc

1.22cde

2.50a

0.123

< 0.001

0.002

< 0.001

Propionate

0.36e

0.81cde

1.28ab

0.74cde

0.99bcd

0.62de

1.15abc

0.92bcd

0.76cde

1.54a

0.096

< 0.001

0.015

0.002

Isobutyrate

0.04c

0.08abc

0.09abc

0.09abc

0.08abc

0.06bc

0.13ab

0.14a

0.07abc

0.15a

0.016

< 0.001

0.003

0.074

Butyrate

0.19b

0.35b

0.59ab

0.40ab

0.45ab

0.26b

0.44ab

0.35b

0.39ab

0.67a

0.065

< 0.001

0.521

0.018

Isovalerate

0.09c

0.17abc

0.24a

0.18abc

0.11bc

0.11bc

0.22ab

0.23ab

0.17abc

0.26a

0.025

< 0.001

0.009

0.024

Valerate

0.09b

0.20ab

0.17ab

0.23ab

0.15ab

0.15ab

0.28a

0.14ab

0.18ab

0.24ab

0.037

0.023

0.184

0.221

Total SCFA

1.48e

2.88cde

4.65ab

2.90cd

3.41bcd

2.29de

3.95bc

3.58bcd

2.83cde

5.42a

0.295

< 0.001

0.012

0.004

  1. a,b,c,d,eValues with different characters in superscripts were different (P < 0.05) in the same row
  2. 1Treatment means are reported as least squares means and are based on 6 observations per treatment. OB Oat bran; WB Wheat bran; SCFA Short-chain fatty acid; SEM Standard error of the mean
  3. 2SCFA concentration (mg/g Feed DM) = SCFA concentration (mg/g feces DM) × feces DM (g)/feed DM (g)
  4. 3D×X is the interaction between diet and xylanase supplementation