Effect of rapeseed oil on effective protein degradability and intestinal protein digestibility of oat, rapeseed meal and dried sugarbeet pulp

To determine the effect of added fat on the ruminal protein degradability a nd intestinal digestibility of oat, rapeseed meal (RSM) and dried sugarbeet pulp (DSBP), three Jersey heifers (450kg) with ruminal and intestinal cann ulae were fed on complete diets containing 0, 3 and 6% rapeseed oil. Effect ive protein degradability (79% for oat, 64% for RSM and 45% for DSBP) diffe red significantly. Addition of 6% RS oil slightly reduced the effective pro tein digestibility of DSBP. Intestinal digestibility also depended on the t ype of feed and addition of 6% rapeseed oil increased it for RSM and DSBP.