Table 4.

Effects of lipid peroxidation dose on growth performance, health status, and viability of nursery pigs¹

	Level of peroxidation						P-value
Item	0%	25%	50%	75%	100%	SEM	Perox2	Linear	Quad
BW, kg
Day 1	5.95	5.95	5.95	5.94	5.95	0.17	0.998	0.794	0.830
Day 7	6.93	6.69	6.72	6.74	6.74	0.21	0.606	0.370	0.273
Day 20	12.03	11.98	11.85	11.97	12.01	0.28	0.759	0.878	0.275
Day 43	22.61	22.35	22.60	22.33	22.56	0.48	0.889	0.880	0.635
ADG, g/d
Days 1 to 7	97	90	89	93	90	8	0.945	0.655	0.614
Days 7 to 20	409	406	399	399	408	8	0.664	0.702	0.181
Days 1 to 20	299	290	281	285	290	7	0.264	0.242	0.060
Days 20 to 43	460	449	465	451	454	12	0.795	0.760	0.957
Days 1 to 43	386	373	377	372	377	8	0.510	0.298	0.264
ADFI, g/d
Days 1 to 7	102	98	97	98	100	5	0.924	0.811	0.370
Days 7 to 20	487	476	479	482	490	10	0.305	0.444	0.052
Days 1 to 20	349	338	338	341	346	8	0.396	0.855	0.057
Days 20 to 43	786	761	777	768	780	17	0.578	0.906	0.254
Days 1 to 43	581	561	568	565	574	12	0.299	0.656	0.076
G:F, g/kg
Days 1 to 7	960	910	888	891	884	58	0.873	0.340	0.595
Days 7 to 20	840	853	829	831	822	10	0.188	0.068	0.600
Days 1 to 20	856	860	830	840	831	10	0.068	0.020	0.687
Days 20 to 43	586	588	598	587	583	7	0.624	0.716	0.226
Days 1 to 43	665	669	664	659	652	5	0.144	0.023	0.216
Removed, %3	5.18	7.95	9.32	10.49	10.10	1.24	0.019	0.002	0.151
Treated, %4	5.37	9.42	11.82	11.42	10.34	1.31	0.003	0.003	0.006
Culled, %5	0.21	0.72	0.91	1.90	1.18	0.45	0.074	0.021	0.286
Mortality, %6	0.97	1.36	2.50	2.73	2.88	0.73	0.270	0.033	0.620
Full-value pigs, %7	98.85	97.82	96.59	95.22	95.95	0.94	0.049	0.005	0.325

¹Values represent least squares means of 20 pens with 22 pigs per pen. Peroxidized corn oil was created by heating (65 °C) corn oil with constant air supply (20 L/min) for 12 d. Oil was stabilized with liquid antioxidant (TBHQ) after peroxidation. Treatments represent a control diet with 5% refined, bleached, and deodorized corn oil (0% peroxidation) and a diet with 5% peroxidized corn oil (100% peroxidation). Intermediate diets were created by mixing the control and peroxidized diets on-farm.

²Main effect of peroxidized corn oil. Main effects were partitioned into linear, quadratic (Quad), cubic, and fourth degree polynomials for trend analysis of peroxidation treatments.

³Pigs removed from original pens to sick pens due to sickness or small size. Removed pigs remained on test, were maintained on their designated dietary treatments, and outcome of pigs in sick pens was tracked. If pigs recovered and were heavier than 13.6 kg at the end of the study, they were considered full-value pigs.

⁴Pigs in original and sick pens that were treated with injectable medicine.

⁵Pigs weighing 13.6 kg or less at the end of the trial period.

⁶Pigs that died in original and sick pens.

⁷All pigs at the end of the trial period minus culled pigs and mortality.