Modeling the adequacy of dietary fiber in dairy cows based on the responses of ruminal pH and milk fat production to composition of the diet

Journal of Dairy Science
Q ZebeliW Drochner

Abstract

The main objective of this study was to develop practical models to assess and predict the adequacy of dietary fiber in high-yielding dairy cows. We used quantitative methods to analyze relevant research data and critically evaluate and determine the responses of ruminal pH and production performance to different variables including physical, chemical, and starch-degrading characteristics of the diet. Further, extensive data were used to model the magnitude of ruminal pH fluctuations and determine the threshold for the development of subacute ruminal acidosis (SARA). Results of this study showed that to minimize the risk of SARA, the following events should be avoided: 1) a daily mean ruminal pH lower than 6.16, and 2) a time period in which ruminal pH is <5.8 for more than 5.24 h/d. As the content of physically effective neutral detergent fiber (peNDF) or the ratio between peNDF and rumen-degradable starch from grains in the diet increased up to 31.2 +/- 1.6% [dry matter (DM) basis] or 1.45 +/- 0.22, respectively, so did the daily mean ruminal pH, for which a asymptotic plateau was reached at a pH of 6.20 to 6.27. This study also showed that digestibility of fiber in the total tract depends on ruminal pH and outflow rate of di...Continue Reading

References

Mar 1, 1997·Journal of Animal Science·G B Huntington
May 1, 1997·Journal of Dairy Science·P W Clark, L E Armentano
Jul 1, 1997·Journal of Dairy Science·D R Mertens
Aug 29, 1998·Risk Analysis : an Official Publication of the Society for Risk Analysis·S S IsukapalliP G Georgopoulos
Apr 9, 1999·Journal of Dairy Science·P W Clark, L E Armentano
Apr 6, 2000·Journal of Dairy Science·K A BeaucheminR Kampen
Jul 11, 2000·Seminars in Cancer Biology·P PanulaK Karlstedt
Oct 26, 2000·Journal of Dairy Science·H W SoitaJ J McKinnon
Feb 24, 2001·Journal of Dairy Science·I Strandén, M Lidauer

❮ Previous
Next ❯

Citations

Jan 15, 2014·Journal of Animal Science and Biotechnology·Simin Poorkasegaran, Asadollah Teimouri Yansari
Aug 21, 2010·Archives of Animal Nutrition·Qendrim ZebeliWinfried Drochner
Oct 21, 2015·Animals : an Open Access Journal From MDPI·Guanshi ZhangBurim N Ametaj
Mar 15, 2016·Frontiers in Microbiology·Stefanie U WetzelsStephan Schmitz-Esser
Aug 27, 2016·Journal of Animal Physiology and Animal Nutrition·B StefańskaJ Skomiał
Dec 26, 2015·Journal of Animal Science and Technology·Elda DervishiBurim N Ametaj
Dec 28, 2018·Journal of Animal Physiology and Animal Nutrition·Huzur Derya ArikMustafa Selcuk Alatas
Feb 26, 2014·Journal of Dairy Science·J A N MillsJ France

❮ 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.