Effects of 00-rapeseed meal inclusion in Parmigiano Reggiano hay-based ration on dairy cows’ production, reticular pH and fibre digestibility

Hay-based diets are typically used in Parmigiano Reggiano cheese production. feeding regulation prohibits 00-rapeseed dietary inclusion. The objectives of this study were to investigate the effects substituting soybean-meal with different levels 00-rapeseed-meal dairy cows’ diets, evaluate possibility include it regulation. had a Latin square design 8 tie stall cows. isoenergetic and isoproteic treatments differed protein source (% DM): S (0.0% 00-rapeseed-meal, 9.3% soybean-meal), LR (3.8% 6.8% MR (8.5% 3.4% HR (13.2% 0.0% soybean-meal). DMI, milk production composition, rumination reticular-pH recorded daily. Dietary fibre digestibility was evaluated by vitro fermentation gointrin content quantified liquid chromatography–tandem mass spectrometry. Statistical analysis performed mixed model. Milk yield, casein increased for incremental levels. treatment compared others resulted higher daily (5.92), fewer minutes pH below 5.8 (467) 5.5 (72). Goitrin detectable when included diet. Overall, inclusion type ratio did not compromise performances cows pointing as reliable substitute soybean-meal. Our results suggest that should be tested studies determine its on organoleptic characteristics quality see if can Italian PDO regulation.Highlights00-rapeseed hay-based diet improve ECM rumen health00-rapeseed-meal introduction is suggested