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Linoleic Acid, Mineral, and Vitamin Requirements of Leghorn-type Chickens a

Linoleic Acid, Mineral, and Vitamin Requirements of Leghorn-type Chickens a

Age

0–6 wk

6–18 wk

18 wk to 1st egg

Layers

Breeders

Linoleic acid (%)

1.00

1.00

1.00

1.00

1.00

Potassium (%)

0.25

0.25

0.25

0.15

0.15

Sodium (%)

0.15

0.15

0.15

0.15

0.15

Chlorine (%)

0.15

0.15

0.15

0.13

0.13

Magnesium (mg)

600

500

400

500

500

Manganese (mg)

60

30

30

20

20

Zinc (mg)

40

35

35

35

45

Iron (mg)

80

60

60

45

60

Copper (mg)

5

4

4

?

?

Iodine (mg)

0.35

0.35

0.35

0.035

0.01

Selenium (mg)

0.15

0.1

0.1

0.06

0.06

Vitamin A (IU)

1,500

1,500

1,500

3,000

3,000

Vitamin D3 (IU)

200

200

300

300

300

Vitamin E (IU)

10

5

5

5

10

Vitamin K (mg)

0.5

0.5

0.5

0.5

1.0

Riboflavin (mg)

3.6

1.8

2.2

2.5

3.6

Pantothenic acid (mg)

10

10

10

2

7

Niacin (mg)

27

10

10

10

10

Vitamin B12 (mg)

0.009

0.003

0.004

0.004

0.08

Choline (mg)

1,300

900

500

1,050

1,050

Biotin (mg)

0.15

0.1

0.1

0.1

0.1

Folacin (mg)

0.55

0.25

0.25

0.25

0.35

Thiamine (mg)

1.0

1.0

0.8

0.7

0.7

Pyridoxine (mg)

3

3

3

2.5

4.5

a Requirements are listed as percentages or as units or mg/kg of diet. Assumes an average daily intake of 110 g of feed/hen/day.

Adapted, with permission, from Nutrient Requirements of Poultry, 1994, National Academy of Sciences, National Academy Press, Washington, DC.