Hempseed cake as a protein feed for ruminants

摘要: Increasing the use of locally produced protein feeds in ruminant production systems northern Europe would be a valuable development. Hemp (Cannabis sativa L.) can cultivated at high latitudes and cold-pressing seeds to extract oil produces residue, hempseed cake (HC), with content. The overall aim studies presented this thesis was investigate possibilities using HC as feed for ruminants. vitro gas technique developed further order estimate rumen degradation; effective degradation (EPD) determined by method low (0.33). When calculated from situ crude (CP) disappearance, had EPD value (0.71-0.84) intestinal digestibility (0.18-0.31) undegradable (RUP). Moist heat treatment could used shift site CP digestion small intestine. highest temperature considered, 130°C, associated largest amount RUP undegraded amino acids digestibility. A proportion neutral detergent fibre indigestible (0.85), which contributed metabolisable energy (9.5 MJ/kg dry matter). (0, 143, 233 or 318 g/kg matter) diet dairy cows effects on yields milk, corrected milk protein, fat lactose that described quadratic functions; achieved fed containing 143 g HC/kg matter. There were linear decreases concentration efficiency (milk protein/CP intake), increase urea, increasing proportions HC. Supplementing barley-based diets peas rapeseed improved growth performance lambs, but inclusion resulted an average daily gain similar control no supplement. results underlying indicate nutritional will limit its