175
Evaluation of different corn oil sources on nursery pig growth performance
A total of 350 pigs (PIC 1050; initially 12 ± 0.04 kg and 45 d of age) were used in a 21-d study to compare the effects of soybean oil and 2 sources of corn oil on nursery pig growth performance with 5 pigs per pen and 10 replications per treatment. The 7 dietary treatments consisted of a corn-soybean meal-based control diet with no added oil or with 2.5 or 5% soybean oil (NE=7,545 kcal/kg) or corn oil from 2 sources (NE=7,459 kcal/kg for both sources). Corn oil sources were derived from post-fermentation extraction from ethanol production. Diets were formulated to have similar standardized ileal digestible Lys:NE ratios (5.09 g/Mcal). Free fatty acid levels were 0.16%, 4.1%, and 11.8% and initial peroxide values were 47.6, 1.0, and 5.6 meq/kg for the soybean, corn oils 1, and 2, respectively. Increasing corn or soybean oil increased (linear; P<0.02) ADG, G:F, and final (d 21) BW. However, a source × level interaction was observed (P<0.05) for ADG, G:F and caloric efficiency (CE; caloric intake/total BW gain). For ADG, increasing soybean oil or corn oil source 1 from 2.5 to 5% increased ADG while increasing corn oil source 2 from 2.5 to 5% decreased ADG. Gain:feed increased at a greater rate for pigs fed corn oil source 1 compared to the other oil sources. For CE, pigs fed soybean oil or corn oil source 2 had poorer CE as level increased from 2.5 to 5%, whereas pigs fed source 1 had improved CE as level increased. In conclusion, soybean or corn oil increased ADG and G:F when compared to the control as expected; however, growth performance varied among the 3 oil sources.
Control |
Soybean oil |
Corn oil source 1 |
Corn oil source 2 |
|
|
|||||
Item |
0% |
2.5% |
5% |
2.5% |
5% |
2.5% |
5% |
SEM |
|
|
|
|
|
|
|
||||||
ADG, g |
633 |
682 |
693 |
662 |
673 |
661 |
655 |
12.8 |
|
|
ADFI, g |
1,011 |
1,026 |
1,008 |
978 |
943 |
981 |
946 |
20.5 |
|
|
G:F |
0.627 |
0.666 |
0.689 |
0.677 |
0.714 |
0.675 |
0.693 |
0.01 |
|
|
CE1 |
3,837 |
3,776 |
3,806 |
3,708 |
3,666 |
3,723 |
3,778 |
63.9 |
|
|
1 Caloric efficiency, Mcal NE/kg of gain |
|
|||||||||
Keywords: corn oil, growth performance, nursery pig