Rumen digestion kinetics, microbial yield, and omasal flows of nonmicrobial, bacterial, and protozoal amino acids in lactating dairy cattle fed fermentation by-products or urea as a soluble nitrogen source

Journal of Dairy Science
S W FessendenM E Van Amburgh

Abstract

The objective of this study was to evaluate the effect of a fermentation by-product on rumen function, microbial yield, and composition and flows of nutrients from the rumen in high-producing lactating dairy cattle. Eight ruminally cannulated multiparous Holstein cows averaging (mean ± standard deviation) 60 ± 10 d in milk and 637 ± 38 kg of body weight were randomly assigned to 1 of 2 treatment sequences in a switchback design. Treatment diets contained (dry matter basis) 44% corn silage, 13% alfalfa silage, 12% ground corn, and 31% protein premix, containing either a control mix of urea and wheat middlings (CON) or a commercial fermentation by-product meal (Fermenten, Arm and Hammer Animal Nutrition, Princeton, NJ) at 3% diet inclusion rate (EXP). The trial consisted of three 28-d experimental periods, where each period consisted of 21 d of diet adaptation and 7 d of data and sample collection. A triple-marker technique and double-labeled 15N15N-urea were used to were used to measure protozoal, bacterial, and nonmicrobial omasal flow of AA. Rumen pool sizes and omasal flows were used to determine digestion parameters, including fractional rates of carbohydrate digestion, microbial growth, and yield of microbial biomass per gr...Continue Reading

References

Nov 1, 1975·Journal of Dairy Science·H R IsaacsonF N Owens
Nov 1, 1992·Journal of Animal Science·J B RussellC J Sniffen
Sep 1, 1985·The British Journal of Nutrition·R C SiddonsP R Cornell
Jan 1, 1987·The Journal of Nutrition·W M CraigD B Ricker
Jan 1, 1972·Journal of Dairy Science·D R WaldoE L Cox
Jul 1, 1980·Journal of the Science of Food and Agriculture·P UdénP J Van Soest
Aug 1, 1996·Journal of Dairy Science·J E Wells, J B Russell
Dec 5, 2000·Journal of Dairy Science·G A BroderickY Nakamura
Mar 20, 2003·Journal of Animal Science·J C Marini, M E Van Amburgh
Apr 28, 2005·Journal of Intensive Care Medicine·Stephen J TaylorClaire Jewkes
Mar 16, 2006·Journal of Dairy Science·M J VandeHaar, N St-Pierre
Dec 31, 2014·Applied and Environmental Microbiology·Bethany L DentonT J Hackmann
Sep 17, 2018·Journal of Dairy Science·E RaffrenatoM E Van Amburgh

Citations

May 21, 2020·Animals : an Open Access Journal From MDPI·Andreas FoskolosSergio Calsamiglia
Mar 19, 2020·Frontiers in Microbiology·Jeffrey L FirkinsJohanna E Plank

Related Concepts

Rumination
Alfalfa
Metazoa
Bos indicus
Zea luxurians
Diet
Fermentation
Lactation, Prolonged
Nitrogen
Omasum

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.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells. It also follows CRISPR-Cas9 approaches to generating genetic mutants as a means of understanding the effect of genetics on phenotype.

Alzheimer's Disease: MS4A

Variants within the membrane-spanning 4-domains subfamily A (MS4A) gene cluster have recently been implicated in Alzheimer's disease in genome-wide association studies. Here is the latest research on Alzheimer's disease and MS4A.

Pediculosis pubis

Pediculosis pubis is a disease caused by a parasitic insect known as Pthirus pubis, which infests human pubic hair, as well as other areas with hair including eye lashes. Here is the latest research.

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.

Rh Isoimmunization

Rh isoimmunization is a potentially preventable condition that occasionally is associated with significant perinatal morbidity or mortality. Discover the latest research on Rh Isoimmunization here.

Pharmacology of Proteinopathies

This feed focuses on the pharmacology of proteinopathies - diseases in which proteins abnormally aggregate (i.e. Alzheimer’s, Parkinson’s, etc.). Discover the latest research in this field with this feed.

Enzyme Evolution

This feed focuses on molecular models of enzyme evolution and new approaches (such as adaptive laboratory evolution) to metabolic engineering of microorganisms. Here is the latest research.

Alignment-free Sequence Analysis Tools

Alignment-free sequence analyses have been applied to problems ranging from whole-genome phylogeny to the classification of protein families, identification of horizontally transferred genes, and detection of recombined sequences. Here is the latest research.