By John P McNamara, James France
This ebook describes present study in modeling nutrient use in cattle, from mobile to environment point. The chapters are built from papers provided at a satellite tv for pc assembly of the ninth overseas Symposium on Ruminant body structure, held in South Africa in October 1999.
* very good papers from a best checklist of contributors
* Editors of serious reputation
* Covers the present issues of curiosity
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Additional info for Modelling nutrient utilization in farm animals
1989) Effect of ionophores on ruminal fermentation. Applied Environmental Microbiology 55, 1–6. H. (1976) Biochemical Calculations, 2nd edn. John Wiley & Sons, New York. S. J. (1979) Microbial biochemistry of methane – a study in contrasts. Microbial Biochemistry 21, 267–353. J. (1960) A theoretical rumen fermentation balance. Journal of Dairy Science 40, 1452–1459. J. Gerrits,1 Andre Bannink2 and James France3 1Animal Nutrition Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands; 2ID-Lelystad, Department of Animal Nutrition, PO Box 65, 8200 AB Lelystad, The Netherlands; 3Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK Abstract Nutritional manipulation through fat supplementation of diets is of interest because of the large energy requirements of high-producing ruminants, and because of human health concerns about saturated long-chain fatty acids (LCFA) in ruminant products.
These are Fs arising from free LCFA in the diet, from hydrolysis of dietary lipid, from biohydrogenation of unsaturated LCFA and from LCFA released upon the death and lysis of microbes in the rumen. , 1992). 80 g gϪ1 microbial LCFA; Harfoot and Hazlewood, 1997) are also assumed to be constant. , 1990; O’Kelly and Spiers, 1991), a fixed composition has been chosen, since it is unknown what proportion of the microbial LCFA is adherent as opposed to incorporated. Details on the biohydrogenation of unsaturated LCFA are described in the Fu pool section.
N. R. A. Dynes3 1CSIRO Animal Production, PO Box 1600, Canberra, ACT 2600, Australia; 2CSIRO Animal Production, Locked Bag 1, Delivery Centre, Blacktown, NSW 2148, Australia; 3CSIRO Animal Production, Private Mail Bag, PO, Wembley, WA 6014, Australia Abstract Most mathematical models of the rumen make use of empirical stoichiometric equations to predict the production of fermentation products in the rumen. These models are based on a one, two and three microbial group representation of the total rumen microbial population.