Author: William John EsdalePublisher:
ISBN:
Category : Cattle
Languages : en
Pages : 352
Book Description
Effect of PH on Ruminal Fermentation in the Bovine
Author: William John EsdalePublisher:
ISBN:
Category : Cattle
Languages : en
Pages : 352
Book Description
Effect of PH on Ruminal Fermentation in the Bovine
Author: The Rumen and Its Microbes
Author: Robert E. HungatePublisher: Elsevier
ISBN: 1483263622
Category : Nature
Languages : en
Pages : 544
Book Description
The Rumen and Its Microbes is a contribution to the ecology of this important microbial habitat. Relatively few microbial habitats have been subjected to a thorough quantitative ecological analysis. The rumen fermentation is peculiarly suitable because of its relatively constant and continuous nature and because of the very rapid rates of conversion of organic matter. Although analysis of the ruminant-microbe symbiosis is still far from complete, knowledge is sufficient for formulation of principles and for identification and measurement of important parameters. The first eight chapters of the book include a description of the rumen and its microbes, their activities, and the extent of these activities. This basic biology provides a framework in which applications to agriculture can be evaluated. These applications are discussed in the last four chapters: host metabolism, variation in the rumen, possible practical applications, and abnormalities in rumen function.
Prediction of Ruminal pH for Beef Cattle. A Physiological Modelling Approach
Author: Mohamed SarhanPublisher: GRIN Verlag
ISBN: 365691334X
Category : Technology & Engineering
Languages : en
Pages : 181
Book Description
Diploma Thesis from the year 2015 in the subject Agrarian Studies, grade: 108/110, Université Paul-Valéry Montpellier 3 (Institut National de la Recherche Agronomique), course: Management of Animal Resources and Sustainable Development in Agriculture, language: English, abstract: Ruminal fluid pH (RpH) is an important parameter for controlling the rumen functions. The ability to predict the RpH of beef cattle fed a given diet without depending on the invasive techniques for its measurements (i.e., rumen cannula) is important to avoid ruminal acidosis. The objectives of this research were to: (i) identify key variables that have a significant associations with RpH; (ii) collect data points (DB) from in-vivo beef cattle studies to identify suitable predictors of RpH after considering the animal measures and the dietary variables from a wide range of diets that can safely be fed to beef cattle; (iii) evaluate the extant RpH models relevant to the study; and (iv) develop a new statistical models for mean RpH predictions. Therefore, feed additives (i.e., monensin) were excluded from the analysis. Models tested that use physically effective fiber (peNDF) as a dependent variable were Pitt et al. (1996, PIT), Mertens (1997, MER), Fox et al. (2004, FOX), Zebeli et al. (2006, ZB6), and Zebeli et al. (2008, ZB8), and those that use rumen volatile fatty acids (VFAs) were Tamminga and Van Vuuren (1988, TAM), Lescoat and Sauvant (1995, LES), and Allen (1997, ALL). The final database was categorized into DB (1) and (2) that included a total of 232 and 95 treatment means from 65 and 26 peer-reviewed publications, respectively, spanning from the 1969s to 2014. The DB included information on animal characteristics, ration composition, and ruminal fermentation and pH, that has been used for independent evaluation and development of RpH prediction models. The average bodyweight was 437±168 vs.556±114 kg, dry matter intake (DMI) was 8.57±2.62 vs.9.60±2.10 kgd-1, peNDF (% DM) was 20.3±17.0 vs.17.2±14.6, and forage (% DM) was 34.8±36.1 vs.26.9±31.0 for DB (1) and (2), respectively. The cattle used were of various ages (i.e., calves, yearlings, mature) and represented various production systems (i.e., backgrounding, finishing, and zero-grazing). The originality of our work is to provide for the first time effective coefficients that are better adapted to beef cattle production. The external validation remains to be done to confirm the effect of the integration of environmental, nutritional, and microbial factors on the RpH fluctuations, using a resilient data source, because of their vitality in accurately predicting the animal responses.
The Nutrient Requirements of Ruminant Livestock
Author: Agricultural Research Council (Great Britain)Publisher: Cabi
ISBN:
Category : Nature
Languages : en
Pages : 376
Book Description
This work discusses the nutrient requirements of all forms of ruminant livestock.
Digestion Trials
Author: John FieldsSome Effects of Sodium Sulfite on Bovine Digestion and Ruminal Fermentation
Author: Lavern Frederick KrabillPublisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 190
Book Description
An Introduction to Rumen Studies
Author: J. W. CzerkawskiPublisher: Elsevier
ISBN: 1483292983
Category : Medical
Languages : en
Pages : 247
Book Description
The rumen is an object of study for many types of biological scientist, from anatomists to microbiologists, and more recently even mathematicians. The developments and use of various experimental techniques have enabled much progress to be made in rumen studies. Several chapters of this book concentrate on these techniques and concepts that stem from their application. Biochemical and microbial interrelationships are dealt with fully, with an emphasis on the integrated nature of the rumen's contents. The book concludes by considering the most fruitful approaches that might lead to a more complete understanding of this complex and efficient organ. Each chapter is a complete unit that can be read and understood without reference to other chapters. A general reading list at the end of each chapter, together with more detailed references, will help to launch the student into any specific area of rumen studies.
The Effect of Varying the Roughage to Concentrate Ratio on the Production of Volatile Fatty Acids in the Bovine Rumen with Observations on the Effect of Location of Sampling Site
Author: Melvin Everett DavisonPublisher:
ISBN:
Category :
Languages : en
Pages : 296
Book Description
Author: