ASG-Lelystad/Nutrition & Food & WU/Animal Nutrition Group
Start date:
07 January 1995
End date:
12 January 2005
Introduction:
The aim is to improve the prediction of the formation of volatile acids from te rumen, and of the transport and the metabolism of volatile fatty acids during transport. These prediction are relevant with respect to the amounts and the type of nutrients available for the dairy cow (in particular glucogeneic versus ketogenic).
Results:
The main causes of inaccurate prediction of volatile fatty acids is 1) inaccuracy of the linetcis of absorptikon from the rumen and 2) the stoichiometry of the formation of volatile fatty caids from fermented substrate. A new stoichiometry was estimated from in vivo data of latating diary cows only, which differed substantially from previsou results in literature. Further, a mechanism of competitive inhibition among individual types of volatile fatty acids was represented in orde to explain interactions in their transport, metabolism and appearance in portal blood.
Articles:
Bannink, A., H. De Visser, A. Klop, J. Dijkstra, and J. France (1997). Journal of Theoretical Biology 189: 353-366.
Bannink, A. and de Visser, H. (1997). Journal of Dairy Science 80, 1296-1314.
Bannink, A., de Visser, H. and van Vuuren, A.M. (1997). British Journal of Nutrition 78, 563-581.
Graduation date:
26 November 2007
Graduation time and place:
16:00 h in the Aula
Title thesis:
Modelling volatile fatty acid dynamics and rumen function in lactating cows
