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The present study was conducted to determine the digestibility of amino acids (AA) in high-protein dried distillers grains with solubles (DDGS) in growing pigs. Six growing males were surgically fitted with a T-cannula to the terminal ileon. Animals were individually allocated in metabolism cages in an environmentally controlled building. On day 10 post-surgery pigs were randomly allotted to 1 of 2 dietary treatments in a cross-over design. The first diet contained 67% of a high-protein corn DDGS; the second diet was formulated to be nitrogen-free to allow for the determination of basal AA endogenous losses. Chromic oxide was added to both diets as an indigestible marker. The experiment consisted of two periods of 7days (5 days of adaptation and 2 days of ileal digesta collection). Standardized and apparent digestibility (SID and AID) of AA were calculated after chemical analysis.
The AID for lysine, metheonine, threonine and tryptophan were 65.9, 87.0, 72.8 and 76.2% respectively. Values for SID AA were 67.8, 87.5, 75.0, and 78.6 for lysine, metheonine, threonine and tryptophan, respectively.
It is concluded that high-protein DDGS obtained has greater AA digestibility values than traditional DDGS and appears to be a suitable ingredient for swine diets.
JY Jacela, HL Frobose, JMDeRouchey, SS Dritz, MD Tokach, JL Nelssen and RD Goodband (2008) Swine day, Kansas State University: 140-141
