EN
The aim of this study was to determine nutrient digestibility, nitrogen retention, and calcium and phosphorus balance in growing-finishing pigs fed control complete diets containing soybean meal and soybean oil, and experimental complete diets where soybean meal and soybean oil were replaced with toasted full-fat soybeans, cold-pressed rapeseed cake and extruded rapeseed cake.The experiment was performed on 28 crossbred pigs (Polish Large White x Polish Landrace sows) x (Hampshire x Pietrain boars) with average body weight of 55–60 kg. The animals were divided into 4 groups of 7 animals each, based on the percentage content of the following components in complete diets: soybean meal, toasted full-fat soybeans, cold-pressed rapeseed cake with increased oil content, extruded rapeseed cake with increased oil content.The processes of extruding rapeseed cake and toasting soybeans had no significant effect on protein digestibility or nitrogen balance. The digestibility of calcium and phosphorus decreased insignificantly in pigs fed diets with rapeseed cake, compared with pigs fed diets with soybean meal and toasted soybeans. Extrusion of rapeseed cake increased the digestibility of ether extract