Table 5.

Effects of Mn source and level on grow–finish pig growth performance, Exp. 2^a

	MnSO4, mg/kg			IBM, mg/kg				Source × level, Ρ =
Itemb,c	8	16	32	8	16	32	SEM	Linear	Quadratic
BW, kg
Initial	40.0	40.0	40.0	40.0	40.0	39.9	0.77	0.821	0.650
Grower	75.9	75.1	74.8	76.3	75.4	75.8	1.20	0.468	0.699
Finald	129.9	129.8	130.0	132.6	130.4	131.2	1.32	0.391	0.207
Grower
ADG, kg	0.89	0.88	0.87	0.90	0.88	0.89	0.013	0.330	0.615
ADFI, kgd,e	1.93	1.89	1.92	1.98	1.93	1.95	0.034	0.578	0.879
G:F	0.463	0.464	0.452	0.454	0.458	0.459	0.0051	0.029	0.652
Finisher
ADG, kg	0.95	0.96	0.97	0.99	0.97	0.97	0.011	0.039	0.258
ADFI, kgd	2.81	2.79	2.83	2.88	2.83	2.85	0.030	0.272	0.782
G:F	0.340	0.344	0.343	0.346	0.343	0.340	0.0041	0.267	0.402
Overall
ADG, kgd	0.93	0.93	0.93	0.95	0.93	0.94	0.007	0.284	0.213
ADFI, kgd,e	2.43	2.41	2.45	2.50	2.45	2.46	0.029	0.236	0.856
G:F	0.381	0.384	0.379	0.382	0.380	0.380	0.0038	0.801	0.332

^aA total of 1,944 pigs (initial BW of 40.0 kg) were used in two groups with 27 pigs per pen and 12 replicates per treatment. Mn sources were Mn sulfate (MnSO₄, Erachem, Veracruz, Mexico) or IntelliBond M (IBM, Micronutrients, Indianapolis, IN).

^bBW, body weight; ADG, average daily gain; ADFI, average daily feed intake; G:F, gain-to-feed ratio; HCW, hot carcass weight.

^cThe grower period was from d 0 to d 42 in group 1 and from d 0 to 38 in group 2. The finisher period was from d 42 to 97 in group 1 and from d 38 to 100 in group 2.

^dMain effect of Mn source (P < 0.05).

^eQuadratic effect of Mn level (P = 0.10).