TABLE 2-1 Nutrient Requirements of Immature Leghorn-Type Chickens as Percentages or Units per Kilogram of Diet

 

 

White-Egg-Laying Strains

Brown-Egg-Laying Strains

Nutrient

Unit

0 to 6 Weeks; 450 ga 2,850b

6 to 12 Weeks; 980 ga 2,850b

12 to 18 Weeks; 1,375 ga 2,900b

18 Weeks to First Egg; 1,475 ga 2,900b

0 to 6 Weeks; 500 ga 2,800b

6 to 12 Weeks; 1,100 ga 2,800b

12 to 18 Weeks; 1,500 ga 2,850b

18 Weeks to First Egg; 1,600 ga 2,850b

Protein and amino acids

Crude proteinc

%

18.00

16.00

15.00

17.00

17.00

15.00

14.00

16.00

Arginine

%

1.00

0.83

0.67

0.75

0.94

0.78

0.62

0.72

Glycine + serine

%

0.70

0.58

0.47

0.53

0.66

0.54

0.44

0.50

Histidine

%

0.26

0.22

0.17

0.20

0.25

0.21

0.16

0.18

Isoleucine

%

0.60

0.50

0.40

0.45

0.57

0.47

0.37

0.42

Leucine

%

1.10

0.85

0.70

0.80

1.00

0.80

0.65

0.75

Lysine

%

0.85

0.60

0.45

0.52

0.80

0.56

0.42

0.49

Methionine

%

0.30

0.25

0.20

0.22

0.28

0.23

0.19

0.21

Methionine + cystine

%

0.62

0.52

0.42

0.47

0.59

0.49

0.39

0.44

Phenylalanine

%

0.54

0.45

0.36

0.40

0.51

0.42

0.34

0.38

Phenylalanine + tyrosine

%

1.00

0.83

0.67

0.75

0.94

0.78

0.63

0.70

Threonine

%

0.68

0.57

0.37

0.47

0.64

0.53

0.35

0.44

Tryptophan

%

0.17

0.14

0.11

0.12

0.16

0.13

0.10

0.11

Valine

%

0.62

0.52

0.41

0.46

0.59

0.49

0.38

0.43

Fat

Linoleic acid

%

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

Macrominerals

Calciumd

%

0.90

0.80

0.80

2.00

0.90

0.80

0.80

1.80

Nonphytate phosphorus

%

0.40

0.35

0.30

0.32

0.40

0.35

0.30

0.35

Potassium

%

0.25

0.25

0.25

0.25

0.25

0.25

0.25

0.25

Sodium

%

0.15

0.15

0.15

0.15

0.15

0.15

0.15

0.15

Chlorine

%

0.15

0.12

0.12

0.15

0.12

0.11

0.11

0.11

Magnesium

mg

600.0

500.0

400.0

400.0

570.0

470.0

370.0

370.0

Trace minerals

Manganese

mg

60.0

30.0

30.0

30.0

56.0

28.0

28.0

28.0

Zinc

mg

40.0

35.0

35.0

35.0

38.0

33.0

33.0

33.0

Iron

mg

80.0

60.0

60.0

60.0

75.0

56.0

56.0

56.0

Copper

mg

5.0

4.0

4.0

4.0

5.0

4.0

4.0

4.0

Iodine

mg

0.35

0.35

0.35

0.35

0.33

0.33

0.33

0.33

Selenium

mg

0.15

0.10

0.10

0.10

0.14

0.10

0.10

0.10

Fat soluble vitamins

A

IU

1,500.0

1,500.0

1,500.0

1,500.0

1,420.0

1,420.0

1,420.0

1,420.0

D3

ICU

200.0

200.0

200.0

300.0

190.0

190.0

190.0

280.0

E

IU

10.0

5.0

5.0

5.0

9.5

4.7

4.7

4.7

K

mg

0.5

0.5

0.5

0.5

0.47

0.47

0.47

0.47

Water soluble vitamins

Riboflavin

mg

3.6

1.8

1.8

2.2

3.4

1.7

1.7

1.7

Pantothenic acid

mg

10.0

10.0

10.0

10.0

9.4

9.4

9.4

9.4

Niacin

mg

27.0

11.0

11.0

11.0

26.0

10.3

10.3

10.3

B12

mg

0.009

0.003

0.003

0.004

0.009

0.003

0.003

0.003

Choline

mg

1,300.0

900.0

500.0

500.0

1,225.0

850.0

470.0

470.0

Biotin

mg

0.15

0.10

0.10

0.10

0.14

0.09

0.09

0.09

Folic acid

mg

0.55

0.25

0.25

0.25

0.52

0.23

0.23

0.23

Thiamin

mg

1.0

1.0

0.8

0.8

1.0

1.0

0.8

0.8

Pyridoxine

mg

3.0

3.0

3.0

3.0

2.8

2.8

2.8

2.8

NOTE: Where experimental data are lacking, values typeset in bold italics represent an estimate based on values obtained for other ages or related species.

a Final body weight.

b These are typical dietary energy concentrations for diets based mainly on corn and soybean meal, expressed in kcal MEn/kg diet.

c Chickens do not have a requirement for crude protein per se. There, however, should be sufficient crude protein to ensure an adequate nitrogen supply for synthesis of nonessential amino acids. Suggested requirements for crude protein are typical of those derived with corn-soybean meal diets, and levels can be reduced somewhat when synthetic amino acids are used.

d The calcium requirement may be increased when diets contain high levels of phytate phosphorus (Nelson, 1984).





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