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Nutrient Requirements of Growing Pullets <sup >a</sup>

Nutrient Requirements of Growing Pullets a

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Age (week)	0–6	6–12	12–18	18 to 1st Egg
*White-Egg Layers*
Body weight (g)^b	450	980	1,375	1,475
Protein	18	16	15	17
Arginine	1.0	0.83	0.67	0.75
Lysine	0.85	0.60	0.45	0.52
Methionine	0.30	0.25	0.20	0.22
Methionine + cystine	0.62	0.52	0.42	0.47
Threonine	0.68	0.57	0.37	0.47
Tryptophan	0.17	0.14	0.11	0.12
Calcium	0.90	0.80	0.80	2.00
Phosphorus, available	0.40	0.35	0.30	0.32
*Brown-Egg Layers*
Body weight (g)^b	500	1,100	1,500	1,600
Protein	17	15	14	16
Arginine	0.94	0.78	0.62	0.72
Lysine	0.80	0.56	0.42	0.49
Methionine	0.28	0.23	0.19	0.21
Methionine + cystine	0.59	0.49	0.39	0.44
Threonine	0.64	0.53	0.35	0.44
Tryptophan	0.16	0.13	0.10	0.11
Calcium	0.90	0.80	0.80	1.8
Phosphorus, available	0.40	0.35	0.30	0.35
^a Requirements are listed as percentages of diet. Nutrient levels should be adjusted to meet specific strain requirements, level of feed intake, and body weight and skeletal development.
^b Average body weight at end of each period.
Adapted, with permission, from Nutrient Requirements of Poultry, 1994, National Academy of Sciences, National Academy Press, Washington, DC.