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The work included two experiments in which three different types of DDGS were compared to a wheat-based diet (CT). The inclusion of DDGS in the diets was 25% and the batches included, one batch of corn DDGS, one of wheat DDGS and a mix of wheat and corn DDGS (4:1). The first trial was a digestibility study in which 12 growing barrows fitted with a T-cannula at the terminal ileum were used. Ileal, faecal and urine samples were collected in order to study the nutrient digestibility and excretion. The second experiment was carried out to study the influence of the DDGS on the performance of the pigs during the growing period. This study involved a total of 100 grower pigs, and the experiment lasted for 5 weeks.
Results from the first study indicated that the total tract digestibility of energy was higher for the CT compared to the DDGS diets (85% vs 77.5%), being the digestible energy (DE) content among DDGS sources highest for corn DDGS. The apparent ileal digestibility (AID) of total and indispensable aminoacids (AA), was similar on DDGS diets, but lower compared to CT diet. However, because the higher AAs content of DDGS, ileal digestible AA content was lower for the CT diet compared to DDGS diets. Results from the second study indicated that, between the different types of DDGS performance results were not modified during the experimental period. However, average daily gain and feed intake presented in the pigs fed with DDGS was lower compared to the results found in the CT diet, with the exception of feed efficiency which was not affected by the experimental treatments.
Results indicate that corn and wheat DDGS have a nutritional value that in terms of energy and AA is higher, compared to that found in wheat. However, growth performance was reduced when DDGS were present in the diets.
GP Widyaratne, RT Zijlstra. 2007. Canadian Journal of Animal Science 87 (1): 103-114
