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Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows
Dissertation (MScAgric)--University of Pretoria, 2014.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2015
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| _version_ | 1867613562902413312 |
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| access_status_str | Open Access |
| author2 | Erasmus, L.J. (Lourens Jacobus) |
| author_browse | Erasmus, L.J. (Lourens Jacobus) |
| author_facet | Erasmus, L.J. (Lourens Jacobus) |
| collection | Thesis |
| dc_rights_str_mv | © 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MScAgric)--University of Pretoria, 2014. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/43177 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:07.678Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/43177 Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows Erasmus, L.J. (Lourens Jacobus) phillip.meiring@gmail.com Meeske, Robin Meiring, Phillip UCTD Dissertation (MScAgric)--University of Pretoria, 2014. The prohibition of the use of growth promoting antibiotics in animal feeds within the European Union (EU) and some other countries has led to an increased interest in alternative means of manipulating rumen fermentation. The objectives of our study were to determine the effects of alternative natural feed additives, essential oils (EO, Oleobiotec) and rumen specific live yeast (LY, Levucell), to monensin (MO) and their effects on rumen fermentation and in sacco NDF, starch and N disappearance. The study consisted out of four rumen cannulated lactating Jersey cows that were used in a 4 x 4 Latin square design experiment. The four experimental treatments were: 1) Control (C), a lucerne hay/maize based TMR (10.7 MJ ME/kg, 17% CP, 32.1% NDF), 2) C + MO, 3) C + EO, 4) C + EO + LY. The experimental periods were 25 days with the last four days for rumen sampling and the in sacco study. Mean ruminal pH ranged between 5.80 and 6.02 and tended (P < 0.10) to be lower in the control cows compared to the other treatments. Total VFA production, acetate : propionate ratio and rumen ammonia nitrogen concentration did not differ (P > 0.05) but lactic acid concentration tended to be lower for the C + EO treatment when compared to MO supplemented cows. In sacco TMR starch disappearance after 24 hours were higher for the C + EO treatment when compared to the C and C + EO + LY treatment groups (P > 0.05). Milk production and DMI did not differ (P > 0.05) but fat % was higher for EO supplemented cows (4.52%) when compared to C cows (4.32%) (P < 0.05). Results suggest a negative interaction between the essential oil and live yeast products used in this study. More research is needed on potential complimentary effects and interactions between feed additives. lk2014 Animal and Wildlife Sciences MScAgric Unrestricted 2015-01-19T12:11:11Z 2015-01-19T12:11:11Z 2014/12/12 2014 Dissertation Meiring, AP 2014, Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows, MScAgric Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/43177> M14/9/186 http://hdl.handle.net/2263/43177 en © 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows |
| title | Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows |
| title_full | Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows |
| title_fullStr | Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows |
| title_full_unstemmed | Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows |
| title_short | Effects of essential oils, ionophore and live yeast supplementation on rumen fermentation dynamics in Jersey cows |
| title_sort | effects of essential oils ionophore and live yeast supplementation on rumen fermentation dynamics in jersey cows |
| topic | UCTD |
| url | http://hdl.handle.net/2263/43177 |