Apparent digestibility of protein and amino acids at the distal ileum and of protein and energy over the whole tract in several extruded soybean cultivars for pigs

Three soybean cultivars (Maple Arrow, Maple Belle, and Maple Glen) commonly grown in the province of Quebec were heat processed by a single-screw dry extrusion process. These soybean products were mixed into cornstarch-based diets that were formulated to provide 16% crude protein. Diets were fed according to a repeated 3 × 3 Latin square design to six gilts fitted with simple T-shaped ileal cannulas. Experimental observations, including apparent digestibilities of amino acids and crude proteins at the distal ileum and of crude protein and energy over the whole tract were not significantly affected by soybean cultivar (P > 0.05). Key words: Full-fat soybean, cultivar, extrusion, digestibility, pigs