Family Poultry Training Course/Trainers' Manual - Nutrient Requirements of Leghorn-Type Laying Hens

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Download Table 2: Nutrient Requirements of Leghorn Type Laying Hens as Percentages or Units per Kilogram of Diet (90 Percent Dry Matter) as a print friendly pdf file

TABLE 2. Nutrient Requirements of Leghorn-Type Laying Hens as Percentages or Units per Kilogram of Diet (90 percent dry matter)

Dietary Concentrations Required by White-Egg Layers at Different Feed Intakes. Amounts Required per Hen Daily (mg or IU)

Nutrient	Unit	80ab	100ab	120ab	White-Egg Breeders at 100 g of Feed per Hen Daily b	White-Egg Layers at 100 g of Feed per Hen Daily	Brown-Egg Layers at 110 g Feed per Hen Dailyc
Protein and amino acids
Crude proteind	%	18.8	15.0	12.5	15,000	15,000	16,500
Argininee	%	0.88	0.70	0.58	700	700	770
Histidine	%	0.21	0.17	0.14	170	170	190
Isoleucine	%	0.81	0.65	0.54	650	650	715
Leucine	%	1.03	0.82	0.68	820	820	900
Lysine	%	0.86	0.69	0.58	690	690	760
Methionine	%	0.38	0.30	0.25	300	300	330
Methionine + cystine	%	0.73	0.58	0.48	580	580	645
Phenylalanine	%	0.59	0.47	0.39	470	470	520
Phenylalanine + tyrosine	%	1.04	0.83	0.69	830	830	910
Threonine	%	0.59	0.47	0.39	470	470	520
Tryptophan	%	0.20	0.16	0.13	160	160	175
Valine	%	0.88	0.70	0.58	700	700	770
Fat
Linoleic acid	%	1.25	1.0	0.83	1,000	1,000	1,100
Macrominerals
Calciumf	%	4.06	3.25	2.71	3,250	3,250	3,600
Chloride	%	0.16	0.13	0.11	130	130	145
Magnesium	mg	625	500	420	50	50	55
Nonphytate	%	0.31	0.25	0.21	250	250	275
phosphorusg
Potassium	%	0.19	0.15	0.13	150	150	165'
Sodium	%	0.19	0.15	0.13	150	150	165
Trace minerals
Copper	mg	?	?	?	?	?	?
Iodine	mg	0.044	0.035	0.029	0.010	0.004	0.004
Iron	mg	25	20	17	6.0	4.5	5.0
Manganese	mg	25	20	17	2.0	2.0	2.2
Selenium	mg	0.08	0.06	0.05	0.006	0.006	0.006
Zinc	mg	44	35	29	4.5	3.5	3.9
Fat soluble vitamins
A	IU	3,750	3,000	2,500	300	300	330
D3	IU	375	300	250	30	30	33
E	IU	6	5	4	1	0.5	0.55
K	Mg	0.6	0.5	0.4	0.1	0.05	0.055
Water soluble vitamins
B12	Mg	0.004	0.004	0.004	0.008	0.0004	0.0004
Biotin	Mg	0.13	0.10	0.08	0.01	0.01	0.011
Choline	Mg	1,310	1,050	875	105	105	115
Folacin	Mg	0.31	0.25	0.21	0.035	0.025	0.028
Niacin	Mg	12.5	10.0	8.3	1.0	1.0	1.1
Panthothenic acid	Mg	2.5	2.0	1.7	0.7	0.20	0.22
Pyridoxine	Mg	3.1	2.5	2.1	0.45	0.25	0.28
Riboflavin	Mg	3.1	2.5	2.1	0.36	0.25	0.28
Thiamine	Mg	0.88	0.70	0.60	0.07	0.07	0.08

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. Grams feed intake per hen daily.
b. Based on dietary AME concentrations of approximately 2,900 kcal/kg and an assumed rate of egg production of 90 percent (90 eggs per 100 hens daily).
c. Italicized values are based on those from white-egg layers but were increased 10 percent because of larger body weight and possibly more egg mass per day.
d. Laying hens do not have a requirement for crude protein per se. However, there should be sufficient crude protein to ensure an adequate supply 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.
e. Italicized amino acid values for white-egg-laying chickens were estimated by using Model B (Hurwitz and Bornstein, 1973), assuming a body weight of 1,800 g and 47 g of egg mass per day.
f. The requirement may be higher for maximum eggshell thickness.
g. The requirement may be higher in very hot temperatures.