Table 3 Apparent ileal digestibility of crude protein (CP) and amino acids (AA) in diets containing 0, 250, 500, 1,000, 2,000, or 4,000 units of microbial phytase (FTU)/kg of complete diet^a

CP

70.6

73.2

75.7

75.6

77.9

76.4

1.66

0.030

0.026

Indispensable AA

 Arg

89.5

89.5

90.2

90.1

90.3

90.4

0.61

0.287

0.505

 His

79.4

80.3

82.7

82.4

82.6

81.2

1.32

0.544

0.087

 Ile

80.5

80.4

82.2

82.6

83.1

82.5

1.18

0.190

0.161

 Leu

80.3

80.1

82.3

82.6

82.5

81.7

1.30

0.463

0.174

 Lys

82.7

84.7

86.2

85.8

85.7

88.1

1.10

0.008

0.593

 Met

88.9

87.5

88.6

89.2

89.2

89.8

0.78

0.076

0.803

 Phe

81.8

80.7

82.2

82.6

83.0

83.2

0.96

0.119

0.455

 Thr

70.3

71.1

73.1

74.8

76.2

75.1

1.73

0.033

0.058

 Trp

78.1

81.0

83.2

84.0

86.1

83.8

1.37

0.011

0.002

 Val

76.4

76.7

79.0

79.3

80.1

78.8

1.50

0.241

0.103

 Mean

80.8

81.3

83.2

83.4

83.8

83.1

1.19

0.196

0.116

Dispensable AA

 Ala

74.3

74.1

77.7

77.4

77.8

77.4

1.53

0.151

0.153

 Asp

74.6

74.8

78.3

78.1

79.1

78.7

1.43

0.041

0.076

 Cys

53.4

54.2

60.2

57.1

60.8

59.1

3.19

0.211

0.234

 Glu

78.0

78.3

82.5

79.6

81.0

80.6

1.76

0.412

0.406

 Gly

58.9

62.5

68.5

66.5

67.3

67.3

2.53

0.079

0.093

 Ser

75.6

76.6

79.2

80.0

81.0

79.7

1.53

0.061

0.035

 Tyr

81.3

80.4

82.2

82.6

83.1

83.6

1.07

0.050

0.405

 Mean

74.1

74.9

78.7

77.4

78.5

78.1

1.61

0.124

0.141

 All AA

77.4

78.1

81.0

80.4

81.1

80.6

1.36

0.143

0.121