Table 10.

Effects of roller mill configuration on growth performance of finishing pigs, Exp. 3¹

Item	Roller mill configuration2				SEM	Probability, P
	2-Hhigh	3-Hhigh	4-High fine	4-High coarse
BW, kg
Day 0	40.1	40.1	40.1	40.1	0.36	<1.000
Day 56	97.3a	95.7b	95.0b	95.6b	0.51	<0.004
Day 97	132.3a	130.3a,b	128.0b	130.4a,b	0.93	<0.022
Day 0 to 56
ADG, kg	1.01a	0.99b	0.97b	0.99b	0.006	<0.003
ADFI, kg	2.53a	2.49a	2.43b	2.48a,b	0.019	<0.007
G:F	0.398	0.396	0.400	0.399	0.0023	<0.758
Day 56 to 97
ADG, kg	0.95a	0.94a	0.89b	0.94a	0.013	<0.005
ADFI, kg	3.24a	3.11b	2.98c	3.11b	0.035	<0.001
G:F	0.294b	0.301a,b	0.299a,b	0.303a	0.0024	<0.071
Day 0 to 97
ADG, kg	0.99a	0.97b	0.94c	0.97a,b	0.007	<0.001
ADFI, kg	2.81a	2.73b	2.65c	2.73b	0.021	<0.001
G:F	0.351	0.354	0.355	0.356	0.0017	<0.152
Caloric efficiency3
ME	9,206	9,135	9,094	9,084	43.3	<0.145
NE	7,180	7,125	7,092	7,085	33.8	<0.136
Carcass characteristics4
HCW, kg	95.5a	94.3a,b	92.7b	93.9a,b	0.68	<0.036
Carcass yield, %	72.18	71.89	72.65	72.55	0.497	<0.562
Backfat, mm	19.85	20.22	19.72	20.37	0.338	<0.367
Loin depth, mm	59.2	58.8	60.3	59.5	0.88	<0.559
Lean, %6	52.41	52.20	52.64	52.22	0.256	<0.472

¹A total of 922 finisher pigs (PIC [Hendersonville, TN] TR4 × [FAST {Saskatoon, SK} Large white × PIC Landrace], initial BW 40.1 ± 0.36 kg) were used in a study with 21 pigs per pen and 11 replications per treatment.

²Corn was ground using two sets of rolls, three sets of rolls, four sets of rolls in a fine-grind configuration, or four sets of rolls in a coarse configuration.

³Caloric efficiency is expressed as kcal/kg gain, using energy values for ME and NE from NRC (2012).

⁴The largest six pigs were marketed from each pen on day 83. All remaining pigs were marketed from each pen on day 97. Carcass characteristics other than yield were adjusted by using HCW as a covariate.

^a–cMeans within row without common superscript differ (P < 0.05).