Formula for Calculating Flock Requirement

Information needed for this calculation is shown in Table 2. Other measurements needed can be calculated: egg mass (EM), energy intake (EI), and energy/gram of egg mass.

Following is the formula to calculate the percentage of methionine needed in the feed. The percentage of other amino acids can be calculated by substituting their constants for the methionine constant, which is 5.4. Lysine has a constant of 12.2, and tryptophan has a constant of 3.2.

EI/EM

EI ^ FI = percent needed in diet

Table 1 Daily nutrient requirements of commercial egg layer and broiler breeder hens

Daily intake

Daily intake

Table 1 Daily nutrient requirements of commercial egg layer and broiler breeder hens

Nutrient

Unita

Commercial egg layers

Broiler breeder hen

Protein

g

15.0

19.5

Arginine

mg

750

1,110

Histidine

mg

170

205

Isoleucine

mg

650

850

Leucine

mg

850

1,250

Lysine

mg

690

765

Methionine

mg

300

450

Phenylalanine

mg

470

610

Threonine

mg

470

720

Tryptophan

mg

160

190

Valine

mg

700

750

Calcium

g

3.25

4.0

Nonphytate phosphorus

mg

250

350

Sodium

mg

150

150

Chloride

mg

130

185

Requirements have been changed from % to mg for comparison between hens. (Requirements for trace minerals and vitamins are given in Ref. 1.)

Requirements have been changed from % to mg for comparison between hens. (Requirements for trace minerals and vitamins are given in Ref. 1.)

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