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United States Department of Agriculture

Agricultural Research Service

Title: Effects of feeding diets containing highly oxidized dried distillers grains with solubles (DDGS) with increasing vitamin E levels to wean-finish pigs on growth performance, carcass composition, and pork fat quality)

Author
item Song, Ran
item Chen, Chi
item Johnston, Lee
item Kerr, Brian
item Weber, Thomas
item Shurson, Gerald

Submitted to: Midwestern Section of the American Society of Animal Science
Publication Type: Abstract Only
Publication Acceptance Date: 3/21/2012
Publication Date: 3/21/2012
Citation: Song, R., Chen, C., Johnston, L., Kerr, B.J., Weber, T.E., Shurson, G. 2012. Effects of feeding diets containing highly oxidized dried distillers grains with solubles (DDGS) with increasing vitamin E levels to wean-finish pigs on growth performance, carcass composition, and pork fat quality [abstract]. Midwestern Section of the American Society of Animal Science. Journal of Animal Science 90 (Suppl. 2):64.

Interpretive Summary:

Technical Abstract: Lipid peroxidation in animal feed has been shown to negatively impact growth performance and meat quality. A total of 432 weanling pigs were used to evaluate the effects of feeding highly oxidized DDGS with 3 levels of vitamin E on growth performance, carcass composition, and pork fat quality. The DDGS source used in this study was 2X higher in thiobarbituric acid reactive substances (TBARS, 5.2 vs. 1.8 ng/mg oil) and 6X higher in peroxide value (PV, 84.1 vs. 11.5 meq/kg oil) than the averages from 30 other sources, and 25X higher in TBARS and 27X higher in PV than a reference sample of corn. Pens within blocks were randomly assigned to one of 6 dietary treatments in a 2 x 3 factorial design. Pigs were fed corn-soybean meal (CON) or 30% DDGS diets with 3 levels of vitamin E (alpha-tocopheryl acetate): none supplemented (No-E), NRC level (1X-E), or 10X NRC level (10X-E). Compared to CON, inclusion of 30% DDGS in diets reduced (P < 0.001) final BW (110 vs. 107 kg), overall ADG (0.76 vs. 0.74 kg/d) and G:F. Overall ADFI tended to decrease (P = 0.10) and G:F increased (P = 0.03) when dietary vitamin E level increased. Hot carcass weight, dressing percentage, backfat depth and loin eye area were reduced (P < 0.01) in pigs fed DDGS compared to CON, but percentage of fat-free carcass lean was not affected. Feeding DDGS increased (P < 0.001) PUFA concentration, particularly linoleic acid (P < 0.001), and iodine value (P < 0.001) in belly fat and backfat compared to pigs fed CON. Vitamin E level in LM was higher (P < 0.001) in 10X-E than No-E or 1X-E dietary treatments. Compared to CON, pigs fed DDGS showed increased vitamin E level in LM when fed No-E (1.0 vs. 3.1 µg/g, P = 0.005), but not when fed 1X-E or 10X-E. These results indicate that feeding highly oxidized, 30% DDGS diets to wean-finish pigs may negatively affect growth performance and dressing percentage, and supplementation of additional vitamin E in the diet did not counteract these effects, but did improve G:F and vitamin E level in LM.

Last Modified: 8/24/2016
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