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Acta Physiologica 2011; Volume 203, Supplement 686
Joint Congress of FEPS and Turkish Society of Physiological Sciences
9/3/2011-9/7/2011
Istanbul, Turkey
EFFECTS OF ROSEMARY AND SAGE EXTRACTS ON IN VITRO RUMEN MICROBIAL FERMENTATION
Abstract number: PC316
Demirtas1 Ahu, Ozturk1 Hakan, Piskin1 Ilksin, Demirkiran2 Deniz, Salgirli1 Yasemin, Reha Fidanci2 Ulvi, Emre1 Bahri
1Department of Physiology, Faculty of Veterinary Medicine, University of Ankara, Ankara, Turkey
2Biochemistry, Faculty of Veterinary Medicine, University of Ankara, Ankara, Turkey
Objective:
The objective of this study was to determine the effects of rosemary and sage extracts on in vitro ruminal fermentation using the long-term rumen simulation technique (RUSITEC).
Methods:
The RUSITEC system was equipped with six fermenters, each with a capacity of 1000 ml. Each fermenter received daily 5 g barley straw and 5 g barley. The experiment lasted 12 days. After an adaptation period of 6 days, the fermenters were divided into 3 groups, first two vessels received no additives (control), second two vessels received 250 mg rosemary extract daily, and third two vessels received 250 mg sage extract daily. During the experimental period rumen fluid pH and protozoa number were determined and samples were collected for the analysis of ammonia nitrogen (NH3-N), volatile fatty acids (VFA) and dry matter digestibility.
Results:
Rosemary and sage extracts had no effect on ruminal pH, total-VFA, propionate and butyrate production, total protozoa number, NH3-N concentration and dry matter digestibility. However, acetate production and acetate/propionate ratio decreased (p < 0.05) when compared with the unsupplemented control fermenters.
Conclusions:
The results of this study showed that rosemary and sage extracts exerted beneficial effects on some fermentation parameters in the RUSITEC system. If these effects were also induced when these substances are added to the rations of ruminants, beneficial changes in the animals' performance may be expected.
To cite this abstract, please use the following information:
Acta Physiologica 2011; Volume 203, Supplement 686 :PC316