Table 7.

Effect of standardized ileal digestible (SID) lysine (Lys) and added Cu on growth performance of finishing pigs, Exp. 1¹

								Probability, P <
Added Cu,2 mg/kg:	0			150				Cu × Lys			SID Lys
SID Lys,3 %:	85.0	92.5	100.0	85.0	92.5	100.0	SEM	Linear	Quadratic	Cu	Linear	Quadratic
BW, kg
Day 0	29.0	29.0	29.0	29.0	28.9	29.0	0.93	0.896	0.940	0.915	0.930	0.840
Day 70	84.2	86.6	86.6	84.5	86.3	88.7	1.50	0.0895	0.124	0.089	0.001	0.325
Day 120	122.8	125.4	126.1	123.7	125.8	130.0	1.38	0.110	0.169	0.006	0.001	0.636
Day 0 to 70
ADG, kg	0.79	0.82	0.82	0.79	0.82	0.85	0.010	0.0346	0.222	0.057	0.001	0.236
ADFI, kg	1.96	2.00	1.97	1.97	1.98	2.04	0.039	0.172	0.0957	0.184	0.053	0.765
G:F	0.402	0.410	0.415	0.400	0.414	0.418	0.005	0.392	0.470	0.494	0.001	0.299
Day 70 to 120
ADG, kg	0.81	0.81	0.82	0.82	0.82	0.83	0.012	0.772	0.956	0.514	0.339	0.519
ADFI, kg	2.52	2.51	2.52	2.51	2.50	2.51	0.031	0.897	0.997	0.599	0.979	0.752
G:F	0.322	0.322	0.325	0.325	0.326	0.331	0.004	0.532	0.925	0.110	0.168	0.597
Day 0 to 120
ADG, kg	0.80	0.82	0.82	0.80	0.82	0.84	0.007	0.109	0.414	0.095	0.001	0.740
ADFI, kg	2.19	2.20	2.19	2.19	2.19	2.23	0.032	0.414	0.333	0.654	0.227	0.949
G:F	0.365	0.370	0.373	0.366	0.374	0.379	0.004	0.276	0.786	0.090	0.001	0.582
Caloric efficiency, Mcal/kg4
ME	9.32	9.19	9.11	9.31	9.10	8.97	42.9	0.278	0.837	0.087	0.001	0.541
NE	6.93	6.81	6.71	6.92	6.74	6.61	31.7	0.276	0.831	0.085	0.001	0.535

¹A total of 1,248 pigs (PIC 337 × 1050 PIC, Hendersonville, TN; initial BW = 29.0 ± 0.1 kg) were used in a 120 d study; 8 pens per treatment and 26 pigs per pen.

²Tribasic copper chloride (Intellibond C; Micronutrients, Inc.).

³SID Lys values are expressed as the percentage of estimated SID Lys requirement for these pigs in this environment and production stage.

⁴Caloric efficiencies were calculated by the following equation: sum of (ADFI × Mcal) ÷ (ADG) for each period.

⁵Effect of Cu within 100 % SID Lys: P = 0.007.

⁶Effect of Cu within 100% SID Lys: P = 0.003.

⁷Effect of Cu within 100% SID Lys: P = 0.019.