Table 2.

Nutrient composition¹ of the 4 extreme diets with the highest and lowest CP level at 2 standardized ileal digestible (SID) Lys levels² (g/kg, unless otherwise mentioned)

	Low Lys, low CP	Low Lys, high CP	High Lys, low CP	High Lys, high CP
DM	881	880	888	881
Crude ash	54	59	54	59
Crude fiber	34	40	33	39
CP	139	188	139	192
Ether extract	40	57	41	55
ADF	38	47	38	43
NDF	107	111	117	104
ADL	7.2	8.6	7.3	7.2
Calcium	5.5	5.5	5.5	5.5
Phosphorus	4.8	5.1	5	5.1
Digestible phosphorus	3.5	3.5	3.5	3.5
LYS	10.5	11.3	11.7	12.0
M+C	6.7	7.3	7.5	7.8
MET	4.6	3.9	5.3	4.6
THR	7.4	8.5	7.9	9.3
TRP	2.6	3.1	2.9	3.2
LEU	12.5	13.8	13.3	14.7
ILE	7.0	7.5	7.3	7.8
VAL	8.9	9.9	9.4	10.2
ARG	5.9	10.2	5.5	10.0
HIS	3.7	4.5	3.9	4.7
PHE	7.0	8.3	7.4	8.3
TYR	4.6	5.0	5.1	5.2
GLU	24.3	36.3	23.1	33.3
SID3 LYS	9.8	10.2	11.0	10.9
SID M + C	6.2	6.5	7.0	7.0
SID MET	4.4	3.6	5.1	4.2
SID THR	6.7	7.4	7.2	8.2
SID TRP	2.4	2.8	2.7	2.8
SID LEU	11.4	12.0	12.2	12.9
SID ILE	6.2	6.6	6.6	6.8
SID VAL	8.2	8.8	8.7	9.1
SID ARG	5.3	9.2	4.9	9.2
SID HIS	3.3	3.9	3.6	4.1
SID PHE	6.4	7.3	6.8	7.3
SID TYR	4.2	4.4	4.6	4.6
SID GLU	22.2	33.3	21.0	30.3
NE, MJ/kg	9.85	9.85	9.85	9.85

¹DM, CP, and total AA (except Tyr) were analyzed on the final diets. Tyr was only analyzed in the basal ingredients. Other values were based on near-infrared spectroscopy analyses of the basal ingredients and published digestibility coefficients (CVB, 2007).

²The other experimental diets were produced by mixing the high and low CP diets (per Lys level) in the required amounts to reach CP levels of 150, 160,170 and 180 g/kg (150 = 0.8 × 140 + 0.2 × 190; 160 = 0.6 × 140 + 0.4 × 190; 170 = 0.4 × 140 + 0.6 × 190; 180 = 0.8 × 140 + 0.2 × 190).

³SID = standardized ileal digestible.