Starch degradability of some concentrate feeds used in dairy cow nutrition

Abstract

Starch degradability in eight commonly used concentrats was determined by the in situ method using two ruminally cannulated lactaing cows. The investigated feeds and their effective starch degradability at a rumen outlow rate of 5% per hour were: wheat bran 75.8%, maize grain 19.9%, oat grain 61, 7%, soybean meal 77,2%, sunflower meal 43.5% dried sugar beet pulp 39.6%, pea grain 75.3%, faba bean graain 58.5%. For some feeds (wheat bran, maize grain) starch degradability was lower, for some higher (oat grain, pea grain) and for only one feed (faba bean grain) was it close to the results found by other authors.