Instant Insights

Chapter 1 - Disorder of digestion and metabolism in dairy cattle: the case of subacute rumen acidosis: Gregory B. Penner, University of Saskatchewan, Canada; 1 Introduction 2 Prevalence, aetiology, and biological consequences of ruminal acidosis 3 Regulation of ruminal pH 4 The dogma of ruminal acidosis 5 Case study: SARA risk in the post-partum phase of the transition period 6 Other examples of SARA risk induced by low feed intake 7 Conclusion and future trends 8 Where to look for further information 9 References

Chapter taken from: Webster, J. (ed.), Achieving sustainable production of milk â" Volume 3: Dairy herd management and welfare, Burleigh Dodds Science Publishing, Cambridge, UK, 2017, (ISBN 978 1 78676 052 4)

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 Introduction 2 Main pathways of rumen fermentation 3 Methane 4 Factors influencing the efficiency of microbial growth 5 Interactions between rumen energy and nitrogen metabolism 6 Conclusion and future trends 7 Where to look for further information 8 References

Chapter taken from: McSweeney, C. S. and Mackie, R. I. (eds.), Improving rumen function, Burleigh Dodds Science Publishing, Cambridge, UK, 2020, (ISBN 978 1 78676 332 7)

Chapter 3 - Advances in dairy cattle breeding to incorporate feed conversion efficiency in national genetic evaluations: Mike Coffey, Scotlandâs Rural College (SRUC), UK; 1 Introduction 2 The importance of feed efficiency as a target for breeding 3 Recording feed intake 4 Pooling genetic data on feed intake 5 Establishing genomic breeding values for feed efficiency 6 Future trends 7 Conclusion 8 Where to look for further information 9 References

Chapter taken from: van der Werf, J. and Pryce, J. (eds.), Advances in breeding of dairy cattle, Burleigh Dodds Science Publishing, Cambridge, UK, 2020, (ISBN 978 1 78676 332 7)

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 â" 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 â" USDA-ARS, USA; and Todd R. Callaway, University of Georgia, USA; 1 Introduction 2 Types of cereal grains fed to cattle 3 Cereal grain production 4 Dietary factors affecting methane production by ruminants 5 The role of starch and forage in methane formation 6 H2 sinks in the rumen and methane production 7 Using cereal grains to improve feed efficiency and reduce methane production 8 Microbiology of cereal grain fermentation 9 Bacteria and archaea involved in fermentation 10 Feed retention time 11 Acidosis and other negative feed effects 12 Summary 13 Where to look for further information 14 References

Chapter taken from: McSweeney, C. S. and Mackie, R. I. (eds.), Improving rumen function, Burleigh Dodds Science Publishing, Cambridge, UK, 2020, (ISBN 978 1 78676 332 7)