Buch, Englisch, Band 06, 132 Seiten, Format (B × H): 152 mm x 229 mm, Gewicht: 206 g
Metabolic disorders in dairy cattle
Buch, Englisch, Band 06, 132 Seiten, Format (B × H): 152 mm x 229 mm, Gewicht: 206 g
Reihe: Burleigh Dodds Science: Instant Insights
ISBN: 978-1-78676-931-2
Verlag: Burleigh Dodds Science Publishing
This specially curated collection features four reviews of current and key research on metabolic disorders in dairy cattle.
The first chapter reviews the prevalence, etiology and effects of ruminal acidosis, as well as ways to counteract it through regulation of ruminal pH. The chapter includes a case study on subacute rumen acidosis (SARA) in the post-partum phase of the transition period.
The second chapter assesses the main pathways for rumen fermentation which is a major factor in efficient transformation of nutrients. It discusses factors influencing the efficiency of microbial growth as well as the interactions between rumen energy and nitrogen metabolism in ensuring efficient digestion and avoiding metabolic disorders.
The third chapter investigates the genetics of improving feed intake efficiency which has significant potential in reducing metabolic disorders. The chapter reviews key challenges in developing genomic selection indices for feed intake, including recording feed intake, pooling genetic data and establishing genomic breeding values for feed efficiency.
The fourth chapter discusses how cereal grains impact feed efficiency in cattle. It reviews how cereal grains can be used to improve feed efficiency and the microbiology of cereal grain fermentation. The chapter also discusses ways of avoiding acidosis and other negative feed effects.
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Weitere Infos & Material
Chapter 1 - Disorder of digestion and metabolism in dairy cattle: the case of subacute rumen acidosis: Gregory B. Penner, University of Saskatchewan, Canada; 1 Introduction2 Prevalence, aetiology, and biological consequences of ruminal acidosis3 Regulation of ruminal pH4 The dogma of ruminal acidosis5 Case study: SARA risk in the post-partum phase of the transition period6 Other examples of SARA risk induced by low feed intake7 Conclusion and future trends8 Where to look for further information9 References
Chapter 2 - Factors influencing the efficiency of rumen energy metabolism: Emilio M. Ungerfeld, Instituto de Investigaciones Agropecuarias (INIA), Chile; and Timothy J. Hackmann, University of California-Davis, USA; 1 Introduction2 Main pathways of rumen fermentation3 Methane4 Factors influencing the efficiency of microbial growth5 Interactions between rumen energy and nitrogen metabolism6 Conclusion and future trends7 Where to look for further information8 References
Chapter 3 - Advances in dairy cattle breeding to incorporate feed conversion efficiency in national genetic evaluations: Mike Coffey, Scotland’s Rural College (SRUC), UK; 1 Introduction2 The importance of feed efficiency as a target for breeding3 Recording feed intake4 Pooling genetic data on feed intake5 Establishing genomic breeding values for feed efficiency6 Future trends7 Conclusion8 Where to look for further information9 References
Chapter 4 - The use of feedlot/cereal grains in improving feed efficiency and reducing by-products such as methane in ruminants: Kristin Hales, US Meat Animal Research Center – USDA-ARS, USA; Jeferson Lourenco, Darren S. Seidel, Osman Yasir Koyun, Dylan Davis and Christina Welch, University of Georgia, USA; James E. Wells, US Meat Animal Research Center – USDA-ARS, USA; and Todd R. Callaway, University of Georgia, USA; 1 Introduction2 Types of cereal grains fed to cattle3 Cereal grain production4 Dietary factors affecting methane production by ruminants5 The role of starch and forage in methane formation6 H2 sinks in the rumen and methane production7 Using cereal grains to improve feed efficiency and reduce methane production8 Microbiology of cereal grain fermentation9 Bacteria and archaea involved in fermentation10 Feed retention time11 Acidosis and other negative feed effects12 Summary13 Where to look for further information14 References
