PSVI-7 Digestible Energy and Metabolizable Energy Concentrations of Corn, Oilseed Meals, and Fibrous Ingredients for Growing Pig

Abstract

Abstract The objective of the present work was to determine digestible energy (DE) and metabolizable energy (ME) concentrations of corn, oilseed meals, and fibrous ingredients fed to growing pig. Twelve barrows with an initial body weight of 34.3 kg (SD = 2.9) were individually housed in metabolism crates. A 12 × 8 incomplete Latin square design with 12 animals, 12 experimental diets, and 8 periods was employed. A basal diet contained 76.7% corn, 19.0% soybean meal (SBM), and 2% soybean oil as the sole source of energy. Ten experimental diets were prepared by replacing 30% of the basal diet with SBM, rapeseed meal, rice bran, corn gluten feed, corn distillers dried grain with solubles (DDGS), wheat bran, sugar beet pulp, copra meal, soybean hulls, or palm kernel expellers. Additionally, a corn diet contained 97.7% of corn as a sole energy source. Each period consisted of a 5-day adaptation period and a 5-day collection period, and the marker-to-marker procedure was used for the quantitative collection of feces and urine. The gross energy concentrations in the experimental diets were close to the calculated values based on the ingredient gross energy values. The DE and ME concentrations in corn (3,911 and 3,866 kcal/kg DM) and SBM (4,004 and 3,780 kcal/kg DM) were greatest (P < 0.05) among the 11 test ingredients followed by DDGS (3,531 and 3,336 kcal/kg DM), rice bran (3,242 and 3,172 kcal/kg DM), soybean hulls (3,081 and 3,103 kcal/kg DM), palm kernel expellers (3,112 and 3,058 kcal/kg DM). The DE and ME concentrations in corn gluten feed (2,624 and 2,460 kcal/kg DM) were less (P < 0.05) than those in all other test ingredients. In conclusion, corn and SBM had the greatest energy values among the corn, oilseed meals, and fibrous ingredients, whereas corn gluten feed had the lowest energy values.