不同采食量下产蛋母鸡的营养需求^a

White-Egg Layers

Protein

18.8

16.7

15.0

13.6

12.5

Arginine

0.88

0.78

0.70

0.64

0.58

Lysine

0.86

0.77

0.69

0.63

0.58

Methionine

0.38

0.33

0.30

0.27

0.25

Methionine + cystine

0.73

0.64

0.58

0.53

0.48

Threonine

0.59

0.52

0.47

0.43

0.39

Tryptophan

0.20

0.18

0.16

0.15

0.13

Calcium

4.12

3.67

3.30

3.00

2.75

Phosphorus, available

0.31

0.28

0.25

0.23

0.21

Brown-Egg Layers

Protein

22.5

20.0

18.0

16.4

15.0

Arginine

1.06

0.94

0.85

0.77

0.71

Lysine

1.05

0.93

0.84

0.76

0.70

Methionine

0.45

0.40

0.36

0.33

0.30

Methionine + cystine

0.89

0.79

0.71

0.65

0.59

Threonine

0.71

0.63

0.57

0.52

0.48

Tryptophan

0.24

0.21

0.19

0.17

0.16

Calcium

5.00

4.44

4.00

3.64

3.33

Phosphorus, available

0.38

0.33

0.30

0.27

0.25