![[Feedback]](/icons/banner/feedbackACT.gif){kind=icon}
![[For Subscribers]](/icons/banner/subscriberACT.gif){kind=icon}
![[Archive]](/icons/banner/archiveACT.gif){kind=icon}
![[Search]](/icons/banner/searchACT.gif){kind=icon}
![[Contents]](/icons/banner/tocACT.gif){kind=icon}
|
|
|
|
|
||
Manuscript received 30 April 1996. Initial reviews completed 18 June 1996. Revision accepted 21 January 1997.
, and
* Wageningen Institute of Animal Sciences, Wageningen Agricultural University, 6700 AH, Wageningen, The Netherlands and Institute of Grassland and Environmental Research, North Wyke, Okehampton, EX20 2SB, UK
This paper describes the development of a mechanistic model integrating protein and energy metabolism in preruminant calves of 80-240 kg live weight. The objectives of the model are to gain insight into the partitioning of nutrients in the body of growing calves and to provide a tool for the development of feeding strategies for calves in this weight range. The model simulates the partitioning of nutrients from ingestion through intermediary metabolism to growth, consisting of accretions of protein, fat, ash and water. The model contains 10 state variables, comprising fatty acids, glucose, acetyl-CoA and amino acids as metabolite pools, and fat, ash and protein in muscle, hide, bone and viscera as body constituent pools. Turnover of protein and fat is represented. The model also includes a routine to check possible dietary amino acid imbalance and can be used to predict amino acid requirements on a theoretical basis. The model is based on two experiments, specifically designed for this purpose. Simulations of protein and fat accretion rates over a wide range of nutrient input suggest that the model is sound. It can be used as a research tool and for the development of feeding strategies for preruminant calves.
Key words: veal calves, computer simulation, mathematical model, protein metabolism, energy metabolism.
This article has been cited by other articles:
|
|
 |
|
  B. J. Suarez, C. G. Van Reenen, N. Stockhofe, J. Dijkstra, and W. J. J. Gerrits Effect of Roughage Source and Roughage to Concentrate Ratio on Animal Performance and Rumen Development in Veal Calves J Dairy Sci, May 1, 2007; 90(5): 2390 - 2403. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. Suarez, C. G. Van Reenen, G. Beldman, J. van Delen, J. Dijkstra, and W. J. J. Gerrits Effects of supplementing concentrates differing in carbohydrate composition in veal calf diets: I. Animal performance and rumen fermentation characteristics. J Dairy Sci, November 1, 2006; 89(11): 4365 - 4375. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. M. Eits, R. P. Kwakkel, and M. W. A. Verstegen Nutrition Affects Fat-Free Body Composition in Broiler Chickens J. Nutr., August 1, 2002; 132(8): 2222 - 2228. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H. Fouillet, C. Gaudichon, F. Mariotti, S. Mahe, P. Lescoat, J. F. Huneau, and D. Tome Compartmental modeling of postprandial dietary nitrogen distribution in humans Am J Physiol Endocrinol Metab, July 1, 2000; 279(1): E161 - E175. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. J. J. Gerrits, J. W. Schrama, and S. Tamminga The Marginal Efficiency of Utilization of All Ileal Digestible Indispensable Amino Acids for Protein Gain Is Lower than 30% in Preruminant Calves between 80 and 240 kg Live Weight J. Nutr., October 1, 1998; 128(10): 1774 - 1785. [Abstract] [Full Text]
|
|
