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Projects / Programmes source: ARIS

Improvement of the efficiency of microbial protein synthesis in the rumen in diets containing grass silages

Research activity

Code Science Field Subfield
4.02.00  Biotechnical sciences  Animal production   

Code Science Field
B420  Biomedical sciences  Nutrition 
Keywords
ruminant nutrition, microbial protein, rumen, silage, fodder beet, molases
Evaluation (rules)
source: COBISS
Researchers (7)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  05658  PhD Drago Babnik  Animal production  Researcher  2004 - 2007  369 
2.  06059  PhD Ana Gregorčič  Chemistry  Researcher  2004 - 2007  268 
3.  16059  PhD Veronika Kmecl  Chemistry  Researcher  2004 - 2007  454 
4.  14548  PhD Špela Velikonja Bolta  Chemistry  Researcher  2004 - 2007  441 
5.  13374  Janko Verbič  Plant production  Researcher  2004 - 2007  343 
6.  10035  PhD Jože Verbič  Animal production  Head  2004 - 2007  983 
7.  22606  PhD Tomaž Žnidaršič  Animal production  Researcher  2004 - 2007  195 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0401  Agricultural institute of Slovenia  Ljubljana  5055431  20,095 
Abstract
Microbial protein contributes about two thirds of the amino acids absorbed by ruminants. In comparison to unfermented feeds the preservation of forages as silages may induce a reduction of microbial protein sinthesis in the rumen. Lower efficiency of microbial protein synthesis in grass silages is due to the fact that a certain number of fermentation end products to be found in silages do not contribute any energy for the growth of rumen microbes while the utilization of others is limited. Other important factors which may limit the efficiency of microbial protein synthesis in diets containing silages are shortage of sugars, low pH value of rumen liquor and asycnhronous release of nitrogen compounds and energy for microbial growth. In practice, the problem is usually tried to be solved by feeding of maize silage, although it does not solve the problem of low sugar concentration in the diet. Theoretically, a beneficial effect of fodder beet on the efficiency of microbial protein synthesis in the rumen may be expected. Fodder beet is characterised by the similar C:N ratio as maize silage but instead of starch, cellulose and hemicelluloses it contains large quantities of sugars and pectins. The aim of this work is to investigate the metabolism of fodder beet in the rumen and to examine its possible beneficial effect on microbial protein synthesis in grass silage based diets.
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