Relationship between ruminal ammonia and nonprotein nitrogen utilization by ruminants. II. Application of published evidence to the development of theoretical model for predicting nonprotein nitrogen utilization

Journal of Dairy Science
R E Roffler, L D Satter

Abstract

Results from published experiments dealing with several aspects of nitrogen utilization by ruminants were used to test the concept of zero utilization of nonprotein nitrogen under conditions where more ammonia (greater than 5 mg ammonia nitrogen/100 ml) is in the rumen than can be converted to microbial protein. Results from experiments where the flow of non-ammonia nitrogen to the abomasum of sheep was measured indicate that when urea was the source of supplemental nitrogen, a constant quantity of amino acids reached the abomasum for all rations ranging from 10 to 23% crude protein. From growth studies, addition of nonprotein nitrogen to low protein, high energy rations caused an improved rate of gain. Additions of nonprotein nitrogen to rations resulting in predicted ruminal ammonia concentrations greater than 5 mg ammonia nitrogen/100 ml rumen fluid were without benefit. From lactation studies, nonprotein nitrogen supplementation did not improve milk production if the ration contained more than 12.5% crude protein prior to supplementation or if the predicted ruminal ammonia concentration was greater than 4 mg ammonia nitrogen/100 ml rumen fluid. The importance of the amino acid requirement of the animal as well as the compos...Continue Reading

References

Aug 1, 1975·Journal of Dairy Science·L D Satter, R E Roffler
Sep 1, 1974·The British Journal of Nutrition·L D Satter, L L Slyter
Jul 1, 1972·The British Journal of Nutrition·J F Coelho da SilvaD G Armstrong
Apr 1, 1972·Journal of Dairy Science·F N KnottJ T Huber
Feb 1, 1969·Zeitschrift für Tierphysiologie, Tierernährung und Futtermittelkunde·H R SharmaA M Frens
Sep 1, 1969·Journal of Dairy Science·H H Van HornA P Graden
Nov 1, 1970·Journal of Dairy Science·C E PolanR L Boman

❮ Previous
Next ❯

Citations

Nov 21, 2017·Journal of Dairy Science·R K McGuffey
Aug 1, 1990·Archiv für Tierernährung·O Steinhöfel, M Hoffmann
May 1, 1980·Journal of Dairy Science·D W ClaypoolH P Adams
Jun 1, 1981·Journal of Dairy Science·J T Huber, L Kung
Nov 21, 2017·Journal of Dairy Science·Charles G Schwab, Glen A Broderick
Jul 1, 1990·Archiv für Tierernährung·O Steinhöfel, M Hoffmann
Apr 1, 1982·Critical Reviews in Microbiology·P N Hobson, R J Wallace
May 1, 1982·Critical Reviews in Microbiology·P N Hobson, R J Wallace
Nov 1, 1977·Journal of Dairy Science·K KwanR E McDowell

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.