The effect of raw, hydrobarothermally treated and fermented rapeseed cake on plasma biochemical parameters, total tract digestibility and gut function in laying hens

Abstract This study evaluated the effects of inclusion raw, hydrobarothermally treated and fermented rapeseed cake (RRC, HRC FRC, respectively) in diets fed to laying hens. Hydrobarothermal treatment decreased hydroxyglucobrassicin neoglucobrassicin content (RC), whereas fermentation significantly reduced all glucosinolates (GLS) phytate phosphorus (PP) concentration. Both FRC increased serum concentrations total protein (TP) globulin (GLB), compared with group C. Group hens had desirably lowest blood triacylglycerol (TAG) levels aspartate aminotransferase (AST) activity. were characterized by alkaline phosphatase (ALP) activity, highest (P) triiodothyronine (T3). Regardless its form, RC improved ether extract (EE) digestibility, dry matter (DM) digestibility calcium (Ca) retention. In comparison C, RRC, cecal digesta weight enhanced activity bacterial α-galactosidase ß-galactosidase; also ammonia concentration ceca β-xylosidase The α-glucosidase α-arabinopiranosidase was highest, β-glucuronidase acetic acid, propionic short-chain fatty acids (SCFAs) birds a diet containing RRC HRC. conclusion, considerably reduces GLS PP. A 20% is more recommended than because it exerted beneficial effect on metabolic parameters intestinal function