Table 1 Feed ingredient and nutrient composition of experimental diets for d 1 to 28

Ingredient (%, as-fed basis)

 Corn

59.50

61.02

62.55

64.07

65.60

 Soybean meal (46.96% crude protein)

27.60

20.70

13.80

6.90

0.00

 Cottonseed meal (46.14% crude protein)

0.00

7.08

14.15

21.23

28.30

 Rice husk

3.90

3.17

2.45

1.72

1.00

 Wheat bran

5.40

4.36

3.31

2.27

1.23

 Limestone

1.00

1.07

1.15

1.23

1.30

 Calcium hydrogen phosphate

1.16

1.12

1.08

1.04

1.00

 DL-Methionine

0.14

0.14

0.13

0.13

0.12

 L-lysine HCl

0.00

0.04

0.08

0.11

0.15

 Salt

0.30

0.30

0.30

0.30

0.30

 Premix^b

1.00

1.00

1.00

1.00

1.00

 Total

100.00

100.00

100.00

100.00

100.00

 Metabolizable energy^c (MJ/kg, as-fed basis)

11.39

11.39

11.39

11.39

11.39

 Dry matter^d (DM)

87.74

87.84

87.78

87.82

87.86

Nutrient level (%, DM basis)

 Crude protein^d

21.82

21.84

21.76

21.81

21.85

 Crude fiber^d

6.10

6.20

6.06

6.13

6.15

 Calcium^d

0.90

0.89

0.89

0.89

0.89

 Available phosphorus^c

0.43

0.43

0.43

0.43

0.43

 Lysine^d

1.06

1.05

1.05

1.04

1.04

 Methionine^d

0.44

0.42

0.44

0.43

0.44

 Arginine^d

1.24

1.35

1.54

1.64

1.78

 Threonine^d

0.71

0.71

0.69

0.68

0.69

 Histidine^d

0.44

0.43

0.46

0.44

0.46

 Isoleucine^d

0.80

0.77

0.74

0.69

0.66

 Leucine^d

1.53

1.48

1.45

1.39

1.26

 Phenylalanine^d

0.95

0.97

0.96

0.96

1.01

 Valine^d

0.81

0.82

0.80

0.81

0.81

 Free gossypol^d (mg/kg, as-fed basis)

0

56

109

166

222