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Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants
Thesis (PhD)--University of Pretoria, 2015.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2015
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| _version_ | 1867613510639288320 |
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| access_status_str | Open Access |
| author2 | Hassen, Abubeker |
| author_browse | Hassen, Abubeker |
| author_facet | Hassen, Abubeker |
| collection | Thesis |
| dc_rights_str_mv | © 2015 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 | Thesis (PhD)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/50905 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:18.025Z |
| 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:2263/50905 Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants Hassen, Abubeker beletegemeda@gmail.com Gemeda, B.S. (Belete Shenkute) UCTD Digestibility Fermentation Methane Perennial grass Tropicat livestock Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-12 Natural and agricultural sciences theses SDG-13 Thesis (PhD)--University of Pretoria, 2015. The main objective of this work was to identify potential rumen modulators or feed additives that improve fibre digestion while reducing enteric methane production from tropical feeds. The research was conducted in the Department of Animal and Wildlife Sciences, University of Pretoria, South Africa. To accomplish this, feed additives and feeding technologies that were tested elsewhere to reduce methane in various ruminant production systems were reviewed in Chapter one. In Chapter two, the in vitro fermentability and methane production of commonly used tropical perennial grasses were studied. In Chapter three, 19 tropical browses collected from Pretoria were studied for their potential fermentation and methane production under in vitro conditions. In Chapter four, three types of tannin-containing browse foliage that were collected from the Kalahari Desert in South Africa were used to replace Medicago sativa hay in a total mixed ration fed to Merino rams in order to investigate their effect on rumen fermentation and enteric methane production. In Chapter five, cellulase and xylanase fibrolytic enzymes were studied for their feed fermentation potential and methane production at seven dose rates. In Chapter six, the effects of fibrolytic enzymes, nitrate and enzyme-nitrate mixture were evaluated by measuring rumen fermentation and enteric methane production in Merino rams. Finally, general conclusions, recommendations and critical evaluation based on this experimental work were presented in Chapter seven. tm2015 bs2026 Animal and Wildlife Sciences PhD Unrestricted SDG-02: Zero hunger SDG-12: Responsible consumption and production SDG-13: Climate action 2015-11-25T09:54:15Z 2015-11-25T09:54:15Z 2015/09/01 2015 Thesis Gemeda, BS 2015, Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants, PhD Thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/50905> S2015 http://hdl.handle.net/2263/50905 en © 2015 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 Digestibility Fermentation Methane Perennial grass Tropicat livestock Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-12 Natural and agricultural sciences theses SDG-13 Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| title | Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| title_full | Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| title_fullStr | Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| title_full_unstemmed | Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| title_short | Use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| title_sort | use of selected tropical feeds and additives as modulators of rumen fermentation and methanogenesis in ruminants |
| topic | UCTD Digestibility Fermentation Methane Perennial grass Tropicat livestock Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-12 Natural and agricultural sciences theses SDG-13 |
| url | http://hdl.handle.net/2263/50905 |