Dissertation/ Thesis
Effects of ad libitum and restricted diets in different feeding regimes on growth and carcass attributes of boars of a selected genetic line
| العنوان: | Effects of ad libitum and restricted diets in different feeding regimes on growth and carcass attributes of boars of a selected genetic line |
|---|---|
| المؤلفون: | Steyn, Willem Johannes |
| Thesis Advisors: | Jansen van Rensburg, Christine, Casey, N.H. (Norman Henry), willem.steyn@topigs.com |
| بيانات النشر: | University of Pretoria, 2011. |
| سنة النشر: | 2011 |
| المجموعة: | South African National ETD Portal |
| Original Material: | Steyn, WJ 2010, Effects of ad libitum and restricted diets in different feeding regimes on growth and carcass attributes of boars of a selected genetic line, MSc(Agric) dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/27678 > E11/411/gm |
| مصطلحات موضوعية: | Finisher pigs, Diets, Ad libitum, UCTD |
| الوصف: | The current modern commercial pig is an animal that has evolved through deliberate breeding programs, controlled environmental influences and nutrition to yield a highly efficient feed converter and fertile animal. The objective of this study was to measure the growth performances and carcass characteristics of entire male grower – finisher pigs which were subjected to different seasonal variations, nutrient dense diets, feeding regimes and group situations under South African circumstances. Period 1 was conducted in the winter from 6 June 2008 to 13 August 2008 and Period 2 in the summer from 3 October 2008 to 10 December 2008. The sire lines that were selected for the experiment had the same genetic breeding values (Topigs Selection Index value), of which two sire lines were the same in both Period 1 and Period 2 and one of two different sires lines was used either in Period 1 or Period 2. The animals were fed two different rations, a high (FH) and a low ration (FL), with the low ration’s specifications being 95 % of the high ration. The animals were randomly allocated three different feed regimes throughout the trial; restricted single feeding (RSF), ad libitum single feeding (ASF) and ad libitum group feeding (AGF). In the winter animals had a greater growth response compared to the summer, with end weight and average daily gain being significant (P Dissertation (MSc(Agric))--University of Pretoria, 2010. Animal and Wildlife Sciences unrestricted |
| Original Identifier: | oai:union.ndltd.org:up/oai:repository.up.ac.za:2263/27678 |
| نوع الوثيقة: | Dissertation |
| الاتاحة: | http://hdl.handle.net/2263/27678 http://upetd.up.ac.za/thesis/available/etd-09012011-144756/ |
| Rights: | © 2010, 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. |
| رقم الانضمام: | edsndl.netd.ac.za.oai.union.ndltd.org.up.oai.repository.up.ac.za.2263.27678 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| الوصف غير متاح. |