Progress in the utilization of urea as a protein replacer for ruminants. A review.
L.G. Helmer,E.E. Bartley +1 more
TLDR
Urea has been used as a protein replacement for ruminants for almost a century as discussed by the authors, and it has been known that ruminant animals have the unique ability to convert nonprotein nitrogen (NPN) to protein.About:
This article is published in Journal of Dairy Science.The article was published on 1971-01-01 and is currently open access. It has received 99 citations till now. The article focuses on the topics: Urea.read more
Citations
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Book ChapterDOI
Manipulation of ruminal fermentation
TL;DR: A proper balance between fermentative and glandular digestion needs to be achieved for optimal productivity in ruminants as mentioned in this paper, which is the goal of most of the diets formulated with an intention of providing the animal with optimal levels of nutrients to achieve the optimal level of performance.
Journal ArticleDOI
Ammonia: Its Effects on Biological Systems, Metabolic Hormones, and Reproduction
TL;DR: Extensive experiments in eight ureotelic species, including man, show that urinary excretion of orotic acid becomes significantly elevated when the quantity of ammonia presented to the liver exceeds the capacity for normal detoxification.
Journal ArticleDOI
A 100-Year Review: Protein and amino acid nutrition in dairy cows.
C.G. Schwab,Glen A. Broderick +1 more
TL;DR: The industry awaits more robust and mechanistic models for predicting supplies and requirements of rumen-available N and absorbed AA, which will be useful in allowing for feeding lower protein diets and increased efficiency of microbial protein synthesis.
Journal ArticleDOI
Protein and Nonprotein Nitrogen Utilization in Dairy Cattle
J.T. Huber,L. Kung +1 more
Journal ArticleDOI
Fermentation and nitrogen dynamics in Merino sheep given a low-quality-roughage diet
John Nolan,S. J. Stachiw +1 more
TL;DR: Fermentation in the rumen and nitrogen dynamics in the body were studied in mature Merino sheep given a maintenance ration of a low-quality-roughage diet containing mainly chopped wheat straw to indicate that turnover of microbial N was considerable, and the total production of micro-organisms was at least twice the net outflow.
References
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Journal ArticleDOI
Some nutritional characteristics of predominant culturable ruminal bacteria
Marvin P. Bryant,I. M. Robinson +1 more
TL;DR: The results indicate that most strains of ruminal bacteria can be grown in defined media, and suggest the relative importance of NH(4) (+) and volatile fatty acids and the relative lack of importance of organic nitrogen compounds such as amino acids in the nutrition of these bacteria.
Journal ArticleDOI
Factors affecting the voluntary intake of food by cows: 7*. The behaviour and reticular motility of cows given diets of hay, dried grass, concentrates and ground, pelleted hay
M. Freer,R. C. Campling +1 more
Journal ArticleDOI
Milk production of cows on protein-free feed.
TL;DR: The synthesis of bacterial protein in the rumen of lactating cows fed on purified carbohydrates, with urea and ammonium salts as the sole sources of nitrogen, can be increased to a level adequate not only for the maintenance of the cow but also for a relatively high milk production.
Related Papers (5)
Effect of ammonia concentration on rumen microbial protein production in vitro
L. D Satter,L. L Slyter +1 more