Abstract
A total of 1,112 pigs were used in a 78-d growth assay evaluating the effects of increasing dried distillers grains with solubles (DDGS, 0, 5, 10, 15, or 20%) on pig growth performance and carcass characteristics. At the end of the trial, jowl fat, belly fat, and backfat samples were collected and analyzed for fatty acid profile and iodine value (IV). From d 0 to 78, ADG and ADFI decreased (linear; P 0.22) in loin depth, but increasing DDGS tended to decrease (P<0.09) backfat and fat-free lean index (FFLI). Backfat, jowl fat, and belly fat iodine values and percentage C 18:2 fatty acids increased (linear, P<0.02) with increasing DDGS in both the “topped” pigs marketed 21 d before trial conclusion and pigs marketed at trial completion. Increasing DDGS decreased (linear, P<0.05) percentage saturated fatty acids in backfat and belly fat in both marketing groups and percentage saturated fatty acids in jowl fat with increasing DDGS in the diet in the pigs marketed at trial completion. Barrows had decreased (P<0.04) belly fat iodine values and percentage 18:2 fatty acids when compared to gilts. Barrows also had increased (P<0.05) jowl fat and belly fat percentage 18:2 fatty acids when compared to gilts. Based on these results and previous research trials, dried distillers grain with solubles from this source can be fed up to 15% before seeing reductions in ADG; however, the increase in iodine value and decrease in dressing percentage must be considered in determining the economic value of DDGS.
Highlights
Demands in fuel ethanol production have led to an increase in dried distillers grains with solubles (DDGS), which is the major byproduct of dry corn milling from fuel ethanol production
A total of 1,112 pigs were used in a 78-d growth assay evaluating the effects of increasing dried distillers grains with solubles (DDGS, 0, 5, 10, 15, or 20%) on pig growth performance and carcass characteristics
Feed efficiency tended to improve (P
Summary
Demands in fuel ethanol production have led to an increase in dried distillers grains with solubles (DDGS), which is the major byproduct of dry corn milling from fuel ethanol production. The swine industry has the opportunity to incorporate DDGS into diets because of increased availability. Built after 1990, have improved processing techniques that can increase amino acid digestibility and make DDGS more applicable to swine industry use. The impact of DDGS on growth performance has been inconsistent due to product variability in drying methods, levels of residual sugars, or grain quality with respect to batch-to-batch variation. Research has shown that DDGS levels anywhere from 0% to 30% of the diet could be fed before growth performance was reduced. It has been theorized that variation in DDGS palatability between sources can influence performance
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