Using different sorghoum varities in feedlot lamb rations
Supervisors:
Prof. dr. ir. Seerp. Tamminga Dr. ir. Jan Dijkstra; Dr. ir. Huug Boer; Dr. Barbara Williams; Dr. ir. Thomas van der Poel
CoOperators:
Financer:
ministry of science, research, and technology of Iran
Start date:
04 March 2003
End date:
04 March 2007
Introduction:
The objectives of this study are: 1.To fractionate and characterise rumen degradation kinetics of these fractions in grains (barley, corn, sorghum) and legume seeds (faba beans, peas, lupins). 2.To determine the chemical composition of these fractions by wet chemistry and by Near Infrared Reflectance Spectroscopy (NIRS). 3.To determine the fermentation kinetics and the fermentation end products of these fractions with the cumulative gas production technique. 4.To study the effects of some feed processing methods on fermentation characteristics of these grains.
Results:
At the first stage of this study a new method of feed fractionation was developed to mimic the washing machine procedure. According to this method feeds can be fractionated to a non washable fraction, an insoluble washable fraction and a soluble washable fraction.Using this method, we can study the degradative behaviour of these fractions.
Articles:
Effects of washing procedure, grain type and particle size on the size of non-washout and insoluble washout fractions in concentrate ingredients.A. Azarfar, S. Tamminga and H. Boer. 2004. Book of abstractcs, EAAP- 55st annual meeting, Bled, 5-9 September 2004.
Graduation date:
29 January 2007
Graduation time and place:
16:00 in the Aula
Title thesis:
Fractions of ruminant feeds: kinetics of degradation in vitro
