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Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig
Dissertation (MSc Agric (Animal Science Animal Nutrition ))--University of Pretoria, 2025.
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University of Pretoria
2025
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| _version_ | 1867613482000580608 |
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| access_status_str | Open Access |
| author2 | Jansen van Rensburg, Christine |
| author_browse | Jansen van Rensburg, Christine |
| author_facet | Jansen van Rensburg, Christine |
| collection | Thesis |
| dc_rights_str_mv | © 2023 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 (MSc Agric (Animal Science Animal Nutrition ))--University of Pretoria, 2025. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/100771 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:50.758Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| 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:2263/100771 Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig Jansen van Rensburg, Christine u17000752@Tuks.co.za Steyn, Willem J. De Jager, Jean-Pierre UCTD Sustainable Development Goals (SDGs) Pigs Beta-adrenergic agonists Salbutamol Performance Ractopamine Dissertation (MSc Agric (Animal Science Animal Nutrition ))--University of Pretoria, 2025. Ractopamine HCl and salbutamol are beta-adrenergic agonists that enhance the performance indicators of pigs when administered in their diet. The aim of the study was to determine the effect of ractopamine HCl and salbutamol on the performance of the finisher pig. A total of 440 pigs (Topigs TN70) served as the subject. The pigs were divided into 40 pens of 11 each. The pigs were fed 5 different treatments in the finisher phase, the 5 treatments were: 1. Negative control (NC): No additives included (16% crude protein (CP) in finisher diet) 2. Positive control: Ractopamine HCl inclusion (6 mg/kg of feed) and current recommendation of 16% CP in the finisher diet. 3. Ractopamine HCl (6 mg/kg of feed), but only 13% CP in the finisher diet while dietary essential amino acid concentrations were similar to the positive control diet. 4. NC diet + salbutamol 10% at 6 mg/kg 5. NC diet + salbutamol 10% at 4 mg/kg The pigs were fed the same diets in the grower phases 1, 2 and 3, the diets consisted of mainly maize, soya, wheat bran sunflower oil cake and a grower vitamin and mineral premix. Feed intake, live weight gain and feed conversion ratio (FCR) were measured. Cold carcass weight, warm carcass weight, lean percentage, dressing percentage and moisture loss were also measured. There were significant differences (p<0.05) in live weight gain, FCR, feed intake and lean percentage when comparing the group fed salbutamol with the group fed ractopamine HCl and the group without the beta-agonist in their diet. The group of pigs fed salbutamol in their diet had performed significantly (p<0.05) better. However, this group, together with the group of pigs fed ractopamine HCl, exhibited a higher return on investment (ROI) during the study. In conclusion, ractopamine HCL and salbutamol enhanced the performance of finisher pigs during this study, although it is expedient to validate these findings for future studies. Animal and Wildlife Sciences MSc Agric (Animal Science Animal Nutrition ) Unrestricted Faculty of Natural and Agricultural Sciences SDG-02: Zero hunger SDG-12: Responsible consumption and production SDG-15: Life on land 2025-02-12T10:19:11Z 2025-02-12T10:19:11Z 2025-04 2025-02 Dissertation * A2025 http://hdl.handle.net/2263/100771 https://doi.org/10.25403/UPresearchdata.28397810 en © 2023 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 Sustainable Development Goals (SDGs) Pigs Beta-adrenergic agonists Salbutamol Performance Ractopamine Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig |
| title | Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig |
| title_full | Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig |
| title_fullStr | Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig |
| title_full_unstemmed | Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig |
| title_short | Beta-adrenergic agonists, ractopamine hydrochloride and salbutamol, as performance enhancers in the finisher pig |
| title_sort | beta adrenergic agonists ractopamine hydrochloride and salbutamol as performance enhancers in the finisher pig |
| topic | UCTD Sustainable Development Goals (SDGs) Pigs Beta-adrenergic agonists Salbutamol Performance Ractopamine |
| url | http://hdl.handle.net/2263/100771 https://doi.org/10.25403/UPresearchdata.28397810 |