Table 1 Ingredients and calculated nutrient compositions of the experimental diets (as-feed basis)

Corn

64.02

58.03

52.05

68.47

63.18

57.90

Wheat bran

2.00

2.00

2.00

2.00

2.00

2.00

Soybean meal

17.40

18.38

19.35

12.28

14.28

16.27

Casein

7.07

3.54

-

6.00

3.00

-

Corn gluten meal

-

7.34

14.68

-

5.27

10.54

Sucrose

3.00

3.00

3.00

3.00

3.00

3.00

Soybean oil

1.10

2.16

3.21

1.17

2.13

3.10

L-Arg

0.06

0.03

-

0.20

0.18

0.16

L-Ile

0.09

0.05

-

0.22

0.19

0.16

L-Leu

0.79

0.40

-

1.00

0.72

0.44

L-Cys

-

0.03

0.06

0.09

0.11

0.13

L-Tyr

-

0.21

0.41

0.24

0.300

0.36

L-His

-

0.02

0.04

0.07

0.10

0.12

L-Lys

0.28

0.45

0.61

0.48

0.60

0.73

L-Met

0.014

0.03

0.05

0.07

0.09

0.11

L-Phe

-

0.23

0.45

0.26

0.33

0.39

L-Thr

0.12

0.12

0.11

0.22

0.22

0.22

L-Trp

0.007

0.02

0.04

0.04

0.05

0.06

L-Val

0.05

0.04

0.03

0.16

0.16

0.17

Limestone

1.00

1.01

1.02

0.88

0.99

1.09

Dicalcium phosphate

1.15

1.10

1.05

1.18

1.18

1.19

Salt

0.85

0.84

0.84

0.85

0.85

0.84

Premix

1.00

1.00

1.00

1.00

1.00

1.00

Total

100.00

100

100.00

100.00

100

100.00

Nutritional levels, %

 Net energy, MJ/kg

10.26

10.255

10.25

10.25

10.26

10.26

 Crude fiber

1.73

1.74

1.75

1.63

1.67

1.70

 Ca

0.80

0.8

0.80

0.80

0.8

0.80

 Available P

0.40

0.4

0.40

0.40

0.4

0.40

SID

 Crude protein

17.54

17.54

17.53

14.89

14.89

14.88

 Arg

1.06

1.06

1.06

1.07

1.07

1.07

 His

0.49

0.49

0.49

0.48

0.48

0.48

 Ile

0.85

0.85

0.85

0.85

0.85

0.85

 leu

2.43

2.425

2.42

2.43

2.43

2.43

 Lys

1.35

1.35

1.35

1.35

1.35

1.35

 Met + Cys

1.24

1.24

1.24

1.24

1.24

1.24

 Phe + Tyr

3.26

3.26

3.25

3.25

3.25

3.25

 Thr

0.79

0.79

0.79

0.79

0.79

0.79

 Trp

0.22

0.22

0.22

0.22

0.22

0.22

 Val

0.94

0.925

0.91

0.86

0.86

0.86