Animal Nutrition; Fermentable carbohydrates and energy metabolism Farm Management; Economics of manure processing systems Animal Nutrition; Additional research on fermentable carbohydrates
Supervisors:
Prof. dr ir Martin Verstegen; dr ir Walter Gerrits
CoOperators:
dr Gerald Lobley; dr Jean-Francois Hocquette; prof. dr J
Financer:
NWO / STW
Start date:
15 March 2002
End date:
15 March 2006
Introduction:
In growing animals, much knowledge is available on ways to manipulate growth rate and body composition by varying the quantity and composition of feed offered each day. Apart from varying nutrient intake, average over the day, one can vary the distribution of nutrient intake within a day. The time at which nutrients are absorbed from the intestinal lumen might be essential to their utilization for maintenance and growth. It is hypothesized that poor nutrient synchrony lowers nutrient utilization for growth processes. Biological mechanisms responsible for the effect of various types of nutrient synchrony on both short term and long term protein and energy metabolism will be investigated.
Results:
- Increasing the feeding frequency increased protein utilization for growth in heavy preruminant calves. - Dietary glucose is almost completely oxidized in preruminant calves and glucose is not deposited as body fat. - A complete separation of protein and starch intake in time decreased the efficiency of protein retention in growing pigs. - A partial separation of protein and lactose intake in time did not affect protein retention but increased fat retention in heavy preruminant calves. - An increase in feeding frequency decreased urinary glucose excretion in heavy preruminant calves. - A separation of protein and lactose intake in time decreased the plasma insulin response.
Articles:
Van den Borne et al (2006), Reprod Nutr Dev 46, 121-137. Van den Borne et al (2006), J Dairy Sci 89, 3578-3586. Van den Borne et al (2006), J Nutr 136, 2181-2187.
