ORIGINAL PAPER
Ruminal fermentation of mixed diets supplemented with St. John’s Wort (Hypericum perforatum) flowers and pine (Pinus mugo) oil or mixtures containing these preparations
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1
ETH Zurich, Institute of Animal Science, Universitaetstrasse 2, CH-8092 Zurich, Switzerland
 
2
INFORAMA, Rütti 5, CH-3052 Zollikofen, Switzerland
 
 
Publication date: 2008-06-24
 
 
Corresponding author
C. R. Soliva   

ETH Zurich, Institute of Animal Science, Universitaetstrasse 2, CH-8092 Zurich, Switzerland
 
 
J. Anim. Feed Sci. 2008;17(3):352-362
 
KEYWORDS
ABSTRACT
An in vitro investigation using the rumen simulation technique (Rusitec) was carried out to investigate the effects of dietary supplementation of plant preparations with known antimicrobial properties on ruminal fermentation. The following preparations were added to a mixed forage-concentrate (1:1) diet (g/kg feed dry matter): Hypericum perforatum flowers (2.86), essential oils of Pinus mugo (0.57) and a plant extract mixture (5.71) containing these two plant preparations in proportions of 0.5 and 0.1 of total, respectively. None of the treatments significantly affected ruminal fermentation traits. A trend towards enhanced bacterial population and daily volatile fatty acid formation was observed with the mixture. Ruminal nitrogen turnover showed a positive trend with Hypericum-only supplementation without affecting protozoal population. According to the present results, it is possible to use these plant extracts as alternatives to antibiotics for the lower gut in the dosages tested without adversely affecting the ruminal ecosystem.
 
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ISSN:1230-1388
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