Table 4 Effects of diet form and particle size of corn on N balance and apparent total tract digestibility (ATTD) of total dietary fiber (TDF) and acid-hydrolyzed ether extract (AEE) in diets fed to group-housed pigs^a

N balance

 N intake, g/d

56

52

55

54

53

54

3.73

0.618

0.931

0.313

 N in feces, %

3.40

3.51

3.39

3.32

3.28

3.21

0.13

0.093

0.606

0.267

 N excretion in feces, g/d

9.29

7.91

7.93

7.49

6.63

6.89

0.55

0.001

0.043

0.005

 Absorbed N, g/d

46.38

44.32

47.24

46.09

46.77

47.44

3.45

0.516

0.459

0.977

 ATTD of N, %

83.19

84.56

85.49

85.63

87.56

87.25

0.97

0.002

0.031

0.021

 N in urine, %

0.19

0.24

0.16

0.24

0.22

0.21

0.05

0.163

0.203

0.029

 N excretion in urine, g/d

12.53

15.97

11.55

12.00

12.15

13.21

3.54

0.526

0.944

0.743

 N retention, g/d

33.85

28.35

35.68

34.09

34.63

34.22

2.50

0.414

0.697

0.809

 N retention, % intake

61.81

56.42

65.50

64.79

65.86

64.47

5.48

0.181

0.620

0.775

 N retention, % absorbed

74.48

66.80

76.55

75.92

75.30

73.98

6.72

0.421

0.985

0.879

TDF digestibility

 TDF intake, g/d

296

238

276

280

253

273

18.62

0.771

0.065

0.188

 TDF in feces, %

40.07

39.30

42.75

45.17

42.10

45.65

1.72

0.007

0.306

0.014

 TDF excretion in feces, g/d

110

91

100

102

86

99

9.20

0.398

0.314

0.503

 Absorbed TDF, g/d

186

148

175

177

167

174

14.28

0.706

0.479

0.601

 ATTD of TDF, %

62.71

61.85

63.48

63.07

66.30

63.75

2.52

0.395

0.765

0.896

AEE digestibility

 AEE intake, g/d

122

116

125

135

134

133

8.89

< 0.001

0.940

0.006

 AEE in feces, %

14.53

16.13

12.09

9.86

10.92

9.20

0.63

< 0.001

0.019

< 0.001

 AEE excretion in feces, g/d

40

36

28

22

22

20

2.43

< 0.001

0.002

< 0.001

 Absorbed AEE, g/d

82

80

97

113

112

113

7.49

< 0.001

0.053

< 0.001

 ATTD of AEE, %

67.12

68.53

77.13

83.33

83.60

84.97

1.45

< 0.001

< 0.001

< 0.001