Pounds (approx.)/100 birds/day | 18 | 20 | 22 | 24 | 26 |
---|---|---|---|---|---|
Grams of feed/bird/day | 80 | 90 | 100 | 110 | 120 |
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 |
a Requirements are listed as percentages of diet. | |||||
Adapted, with permission, from Nutrient Requirements of Poultry, 1994, National Academy of Sciences, National Academy Press, Washington, DC. |