Nitrogen metabolism is reviewed with emphasis on methods for quantitating various
nitrogen-transactions in the rumen of animals on a variety of diets. Ammonia kinetics …

With the ruminant animal, we have essentially two ecosystems, namely, the microbial
ecosystem within the rumen and the animal's external environment. In dealing with the …

In developing countries the productivity of meat and milk producing animals is low compared
with that of the livestock in developed countries, and the availability of meat and milk per …

In addition to the bacteria in the rumen there are many larger (S-2SO, um long) organisms
which at various times have been designated protozoa. Of these the'ovals'(Quin's and …

In order to establish baseline nitrogen isotope data for certain African ecosystems, we have
measured the 15 N 14 N of some 300 marine and terrestrial organisms. The majority of …

In 1991 a new protein evaluation system replaced the Digestible Crude Protein (DCP)
system in the Netherlands: the DVE/OEB-system. The system was mainly developed with the …

Nutrient Requirements of Domesticated Ruminantsdraws on the most up-to-date research
on the energy, protein, mineral, vitamin and water requirements of beef and dairy cattle …

Samples and extracts of foliage from African multipurpose trees were screened for their
effects on rumen protozoa and bacteria with a view to predicting their safety as feed …

Microbial protein supply to the duodenum should be maximized for efficient use of feed
protein and energy. High producing ruminants often are fed significant concentrations of …

The transport of nitrogen across the rumen epithelium is characterized by absorption of
ammonia from the rumen and by an influx of urea into the rumen. The transport rates of both …