Digestion in sheep of diets containing barley chemically treated to reduce its ruminal degradability
Citations Over TimeTop 10% of 1988 papers
Abstract
Abstract Sheep fitted with cannulas in the rumen and proximal duodenum were used to study the digestion of two diets of rolled barley and dried grass (39:61 on a dry matter basis) which were given in 24 meals (at 1‐h intervals) each day. The two diets contained the barley either in untreated form or treated with an acidic formaldehyde reagent which was designed to cross‐link the barley protein and starch and thereby reduce its rate of degradation in the rumen. There were no significant (P<0.05) differences between the diets in rumen pH, protozoal numbers and concentrations of ammonia N and total and individual volatile fatty acids. However, the diet containing the treated barley increased (P<0.05) duodenal passage of total N from 17.4 g day −1 to 20.5 g day −1 and duodenal passage of starch from 8g day −1 to 16 g day −1 , the latter representing a change from 0.038 to 0.074 of the dietary starch intake. For both constituents there were associated increases in the amounts absorbed in the intestines. There were no significant differences between treatments in the digestion of acid detergent fibre.
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