Thesis (MScAgric)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: The objective of this study was to determine the effect of the inclusion of Acid Buf™ at 4g.k–1 g to a maize-soya bean diet in both pelleted and meal form, on the occurrence of stomach
ulcers, performance parameters, carcass characteristics and histological parameters of the
small intestine of growing finisher pigs. The trail was done on 320 growing finisher pigs fed
for 8 weeks. The four treatments (Tr) were as follows: Tr1 – pelleted, Tr2 – meal, Tr3-
pelleted with Acid Buf™ at 4g.kg-1, Tr4 –meal with Acid Buf™ at 4g.kg-1.
No significant differences (P>0.05) were observed for cumulative feed intake between the
different treatments. The feed conversion ratio (FCR) showed significant differences with the
pigs on the meal diet faring significantly (P<0.05) worse than those the pelleted diet
containing Acid Buf™. The average daily gain (ADG) on Tr3 was significantly better
(P<0.05) than those on the meal diets. Overall the performance parameters showed a
positive response to the inclusion of Acid Buf™.
With regards to changes in the intestinal pH, significant differences (P<0.05) were observed
between the different treatments for pH in the stomach, duodenum and colon. The pH in the
stomach was closest to optimal with Tr3m and Tr4. The pH in the duodenum was highest
and closest to optimum with Tr4.
Scoring of stomachs revealed that the highest percentage of normal stomachs was found in
pigs on Tr4, with 64.1% of the stomachs being normal,57.1% was the second highest
percentage of normal stomachs and was found with Tr3, pelleted with AB. Carcass scoring
showed no significant differences (P>0.05) between the different treatments. The mean villi height to crypt depth ratio (VH: CD) in the jejunum showed a significant
difference (P<0.05) between Tr1 and Tr3. The pigs on the pelleted diet had VH: CD of 0.89
while those on the pelleted diet with AB a VH: CD of 1.28. The average villi height
measured in both the duodenum and the jejunum was higher in both of the pelleted diets
compared to the meal diet and the meal with AB diet. The results of the different
experiments conducted to evaluate the effect of AB all showed improved results with the
inclusion of AB to the diet. / AFRIKAANSE OPSOMMING: Die doel van hierdie studie was om die effek van die insluiting van Acid Buf™(AB) teen 4g.kg-1 in 'n mielie-sojaboondieët in beide verpilde- en meelvorm, op die voorkoms van
maagsere, groei parameters, karkaseienskappe en histologiese parameters van die
dunderm in groeivarke te bepaal. Die studie is vir agt weke op 320 groei varke uitgevoeroor.
Die vier behandelings (Tr) was soosvolg: Tr1 - verpil, Tr2 - meel, tr3- verpil met Acid Buf™
teen 0,4% ingesluit, Tr4 – meel metAcid Buf™ teen 0,4% ingesluit.
Daar was geen beduidende verskille (P> 0.05) in die kumulatiewe voerinname tussen die
verskillende behandelings waargeneem nie. Voeromsetverhouding (VOV) op die meel diet
(Tr4) het beduidend swakker gevaar (P<0.05) as die varke op Tr3. Die gemiddelde
daaglikse toename (GDT) van die varke op Tr3 was aansienlik beter (P<0.05) as die van die
varke op Tr2.
Met betrekking tot die pH van die spysverteringskanaal was daar beduidende verskille
(P>0.05) opgemerk tussen die verskillende behandelings vir pH in die maag, duodenum en
kolon. Die pH in die maag was die laagste en naaste aanoptimaal vir die AB dïete . Die pH
in die duodenum was die hoogste en naaste aan optimaal met Tr4.
Gradering van die mae toon die hoogste persentasie van normale, met 64.1 % van die mae
met Tr4 normaal. Die tweede hoogste persentasie was 57.1 % normale mae en was gevind
met Tr3, verpil met AB. Karkasgradering het geen beduidende verskille (P>0.05) tussen die
verskillende behandlinge getoon nie. Die gemiddelde villi hoogte kryptdiepte verhouding (VH: KD) in die jejenum het beduidende
verskille (P<0.05) getoon tussen Tr1 en Tr3. Die verpilde diet (Tr1) het n (VH: KD) van 0.89
getoon en Tr3, die varke op die verpilde diët met AB 1.28. Die gemiddeldie villi hoogte
gemeet in beide die duodenum en jejenum was hoër in die beide die verpilde diëte as in die
meel diëte. Die resultate van die verskillende eksperimente uitgevoerom die effek van AB
teevalueer, toon verbetering met die insluiting van AB in die diët.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/86491 |
| Date | 04 1900 |
| Creators | Steenkamp, Jan Adriaan |
| Contributors | Pieterse, E., Hoffman, L. C., Stellenbosch University. Faculty of AgriScience. Dept. of Animal Sciences. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | ix, 62 p. : ill. |
| Rights | Stellenbosch University |
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