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Evaluation of different oil sources for nursery pigs
A total of 210 pigs (PIC 327 × 1050, initially 13.1 kg BW and 46 days of age) were used in a 21-d trial to evaluate the effect of oil source and level on nursery pig growth performance. The 2 oil sources included a commercial source of soybean oil (Grain States Soya Inc., West Point, NE), and a proprietary source of refined corn oil originating from the ethanol industry (Corn Oil ONE®, LLC Pleasant Hill, IA). The 5 experimental diets included: a control diet without added oil, diets with 2.5 or 5% added soybean oil, or diets with 2.5 or 5% added corn oil. Diets were formulated with an identical standardized ileal digestible Lys:calorie ratio and were fed in meal form. There were 6 pens per treatment with 7 pigs per pen. Soybean oil and corn oil were assigned a NE value of 7,545 and 7,549 kcal/kg (NRC, 2012), respectively for diet formulation. Overall, from d 0 to 21, there were no oil source by level interactions, or differences between oil sources observed. Increasing corn or soybean oil had no effect on ADG or final BW; however, increasing corn oil or soybean oil decreased (linear; P < 0.05) ADFI, which resulted in improved (linear; P < 0.01) G:F. Caloric efficiency (CE; Mcal NE/kg of gain) was not affected by oil source or level indicating the energy values assigned to the oil sources were accurate. This study shows the benefits of adding either corn or soybean oil in late-phase nursery diets to improve G:F.
Control |
Soybean oil |
Corn oil |
|
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Item |
0% |
2.5% |
5% |
2.5% |
5% |
SEM |
|
|
|
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ADG, g |
643 |
655 |
634 |
645 |
642 |
12.8 |
|
ADFI1, g |
989 |
981 |
889 |
945 |
913 |
23.7 |
|
G:F1 |
0.651 |
0.668 |
0.714 |
0.684 |
0.704 |
0.01 |
|
CE, NE/kg of gain |
3,686 |
3,757 |
3,668 |
3,674 |
3,717 |
49.0 |
|
1 Linear effect of increasing oil (P<0.05). |
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Keywords: corn oil, nursery pig, soybean oil