Ileal and total tract apparent crude protein, dry matter, gross energy and amino acids digestibility of soybean meal, solvent-extracted canola meal, and corn distillers dried grain with solubles for growing pigs

Abstract

The present study was conducted to determine the apparent total tract digestibility (ATTD) and apparent ilealdigestibility (AID) of dry matter (DM), gross energy (GE), crude protein (CP), and amino acids (AA) in soybeanmeal (SBM), solvent-extracted canola meal (SECM) and corn distiller dried grain with solubles (corn-DDGS) forgrowing pigs. Three growing barrows (Landrace × Yorkshire × Duroc, 33.37±1.11 kg of BW) fitted with a simpleT-cannula at the distal ileum were fed 31.61% SBM, 39.33% SECM, or 52.17% corn-DDGS as the sole proteinsource diets in a 3 × 3 Latin square design with 3 diets and 3 periods. The ATTD and AID for DM, CP, and GE inSBM were greater than in corn-DDGS. Similarly, the ATTD and AID of CP in SBM were greater than in SECM.SBM had greater AID for phenylalanine, cystine, proline, and tyrosine than corn-DDGS. SBM had greater AID forlysine, methionine, threonine, valine, aspartic acid, glutamic acid, glycine, serine, total essential AA, total nonessential AA, and total AA than SECM and corn-DDGS. SECM had greater AID for lysine, aspartic acid, glycine,and tyrosine, but less glutamic acid than corn-DDGS. In conclusion, the results imply that SBM had greater ATTDand AID of DM and GE than corn-DDGS. The values of AID of N and the majority of AA were higher in SBM thanin SECM and corn-DDGS.