Effects of dietary lysine levels on plasma free amino acid profile in late-stage finishing pigs

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Table 1 Composition of three corn- and soybean meal-based diets for the finishing pigs

Item	Experimental diet
Item	Diet I	Diet II	Diet III
Ingredient (%)
Corn	90.844	90.494	90.144
Soybean meal	6.400	6.400	6.400
Canola oil	0.800	0.800	0.800
l-Lysine-HCl^a	0.000	0.350	0.700
dl-Methionine^b	0.040	0.040	0.040
l-Threonine^a	0.090	0.090	0.090
l-Tryptophan^c	0.035	0.035	0.035
Limestone	0.650	0.650	0.650
Dicalcium phosphate	0.900	0.900	0.900
Salt	0.200	0.200	0.200
Mineral premix^d	0.033	0.033	0.033
Vitamin premix^e	0.008	0.008	0.008
Calculated energy and nutrient ^f
Dry matter (%)	90.0	90.0	90.0
Metabolizable energy (kcal/kg)	3319	3323	3326
Net energy (kcal/kg)	2371	2375	2378
Crude protein (%)	10.45	10.75	11.0
SID lysine (%)	0.32	0.60	0.87
SID methionine + cysteine (%)	0.47	0.47	0.47
Total Ca (%)	0.46	0.46	0.46
Total P (%)	0.43	0.43	0.43
Available P (%)	0.26	0.26	0.26

As fed basis
SID standardized ileal digestible
^a l-Lysine-HCl (98.5 %) and l-threonine (98.5 %) were donated by Archer Daniels Midland Co., Quincy, IL)
^bDL-Methionine (99.0 %; Rhodimet, NP 99) was donated by Adisseo USA Inc. (Alpharetta, GA)
^c l-Tryptophan (99.0 %) was donated by Ajinomoto Heartland, Inc. (Chicago, IL)
^dSwine Trace Mineral Mix (No. 85) was donated by Prestage Farms of Mississippi, Inc. (West Point, MS) that contained 13.2 % Ca, 1.0 % Cu, 8.0 % Fe, 5.0 % Mn, 10.0 % Zn, 500 ppm I, and 300 ppm Se
^eVitamin Premix for Market Swine was donated by Prestage Farms of Mississippi, Inc. (West Point, MS) that contained per kilogram 22.05 million IU vitamin A, 3.31 million IU vitamin D₃, 66,138 IU vitamin E, 88 mg vitamin B₁₂, 220 mg biotin, 8818 mg menadione, 15,432 mg riboflavin, 61,728 mg d-pantothenic acid, and 88,183 mg niacin
^fOnly the selected major nutrients are listed