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Table 3 Effect of dietary characteristics and xylanase addition on nutrient digestibility and nitrogen balance of growing pigs (DM basis)1

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

Item

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×X2

Average BW

35.0

35.5

35.0

35.6

36.5

36.6

38.2

35.9

35.1

35.6

0.96

0.572

0.212

0.313

DMI, kg/d

1.21

1.23

1.28

1.25

1.28

1.26

1.37

1.34

1.25

1.28

0.04

0.295

0.051

0.421

ATTD, %

 DM

91.0a

86.8bc

80.7d

88.8abc

85.2c

89.9ab

86.0bc

85.3c

89.4abc

87.2abc

1.00

< 0.001

0.043

0.041

 GE

90.2a

86.0b

79.6c

87.9ab

84.2bc

89.1ab

85.4b

81.6bc

88.4ab

86.4ab

1.08

< 0.001

0.082

0.048

 CP

89.6a

86.9a

80.2c

88.2a

84.8ab

88.5a

84.7ab

85.7ab

89.0a

87.0a

1.44

< 0.001

0.045

0.043

 NDF

63.5ab

70.0a

53.3b

63.4ab

57.5ab

61.0ab

63.5ab

58.9ab

65.2ab

60.7ab

2.74

0.003

0.861

0.215

 ADF

65.2a

58.1ab

44.9c

61.4a

56.2ab

63.8a

53.7ab

53.5ab

62.1a

60.4a

3.29

0.022

0.025

0.036

 OM

92.1a

88.8ab

82.6c

90.3ab

86.7bc

91.1a

88.1ab

86.6bc

90.8ab

88.5b

0.93

< 0.001

0.122

0.064

 UE/DE

1.80

1.97

2.47

1.85

1.77

1.54

2.02

1.63

1.47

1.54

0.26

0.412

0.118

0.353

 CH4E/DE

0.58

0.40

0.57

0.52

0.45

0.51

0.31

0.34

0.55

0.51

0.08

0.142

0.243

0.385

Nitrogen balance, g/d

 Intake

36.8b

40.4ab

40.1ab

39.0b

39.3ab

38.3b

45.0a

41.7ab

39.0b

39.1b

1.27

0.002

0.075

0.353

 FN

4.0c

5.4abc

7.7a

4.8bc

6.0abc

4.7bc

7.1ab

7.2ab

4.5bc

5.2abc

0.58

< 0.001

0.702

0.181

 UN

7.1

7.0

6.3

7.7

6.5

6.2

7.6

7.0

7.7

8.7

0.80

0.544

0.298

0.395

 RN

25.6

28.0

26.1

26.5

26.8

27.5

30.3

27.5

26.7

25.2

1.28

0.324

0.142

0.571

  1. a,b,c,dValues 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; BW Body weight (mean values in collection period); DM Dry matter; DMI Dry matter intake; ATTD Apparent total tract digestibility; GE Gross energy; CP Crude protein; NDF Neutral dietary fiber; ADF Acid detergent fiber; OM Organic matter; UE Urinary energy; CH4E Methane energy; FN Nitrogen output from feces; UN Urinary nitrogen excretion; RN Total retained nitrogen; SEM Standard error of the mean
  3. 2D×X is the interaction between diet and xylanase supplementation