The extensive development of the ruminant forestomach sets apart their N economy from
that of nonruminants in a number of respects. Extensive pregastric fermentation alters the …

Movements of N across the gut can be more than double N intake and thus have major
effects on N metabolism of the ruminant. These movements may be associated with net …

Following its predecessor, the second edition of Amino Acids: Biochemistry and Nutrition
presents exhaustive coverage of amino acids in the nutrition, metabolism and health of …

The objectives of this study were to evaluate the potential for using blood urea N
concentration to predict urinary N excretion rate, and to develop a mathematical model to …

To study the effect of dietary N level on urea kinetics and recycling, four Holstein heifers
(267±3.6 kg) were used in a Youden square design. Isocaloric diets with a N content of 1.44 …

The objective of this study was to determine how interactions between dietary crude protein
(CP) and rumen-degradable protein (RDP) concentrations alter urea-nitrogen recycling …

Maintaining a correct balance of N is essential for life. In mammals, the major sources of N in
the diet are amino acids and peptides derived from ingested proteins. The immediate …

Abstract Effects of supplemental RDP and RUP on nutrient digestion, N metabolism, urea
kinetics, and muscle protein degradation were evaluated in Nellore heifers (Bos indicus) …

We evaluated the effect of increasing amounts of rumen-degradable intake protein (DIP) on
urea kinetics in steers consuming prairie hay. Ruminally and duodenally fistulated steers …

An analysis of predicting urinary and fecal N excretion from beef cattle was conducted using
a data set summarizing 49 published studies representing 180 treatment means for 869 …