Nitrogen exchanges in the rumen

The conversion of plant nitrogen to microbial nitrogen in the rumen of the sheep.

An estimate of the extent of conversion of plant nitrogen to microbial nitrogen in the rumen of sheep fed on wheaten hay was reported in an earlier communication (Gray & Pilgrim, 1953). The basis of separation of plant from microbial material was simply the filtration of the rumen contents through muslin with subsequent limited washing of the fibrous plant residues to free them from the remaini...

Transfer of urea nitrogen across the rumen wall.

HOUPT, T. RICHARD, AND KATHERINE A. HOUPT. Transfer of urea nitro,gen across the rumen wall. Am. J. Physiol. 2 1 /t(6) : 1296-1303. 1968.-Net movement of urea N across the wall of Pavlov-type rumen pouches was measured in three goats and one sheep as urea concentration difference between pouch and blood was varied. When urease activity of the rumen epitheliurn was depressed by vigorous rinsing ...

Role of rumen butyrate in regulation of nitrogen utilization and urea nitrogen kinetics in growing sheep.

Butyrate, a major rumen VFA, has been indirectly linked to enhancement of urea recycling on the basis of increased expression of urea transporter in the rumen epithelia of steers fed a rumen butyrate-enhancing diet. Two studies were conducted to quantify the effect of elevated rumen butyrate concentrations on N balance, urea kinetics and rumen epithelial proliferation. Wether sheep (n= 4), fitt...

Effect of dietary nitrogen source on carbohydrate metabolism in the rumen of the young steer.

1. Steers, fitted with simple rumen and duodenal cannulas, were given diets of approximately equal parts of flaked maize and hay (A) (containing 16 g nitrogen/kg dry matter (DM) or diets of flaked maize and straw supplemented with decorticated groundnut meal (B), fish meal (C), or heated (D) or unheated (E) soya-bean meal (containing 24 g N/kg DM). Chromic oxide was given as a marker with the f...

Effect of niacin on the efficiency of nitrogen utilisation in the rumen of dairy cows