The evaluation of the effect of Acid Buf™ on stomach ulcer occurrence, growth performance and histological parameters of grower - finisher pigs

Steenkamp, Jan Adriaan (2014-04)

Thesis (MScAgric)--Stellenbosch University, 2014.

Thesis

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.

Please refer to this item in SUNScholar by using the following persistent URL: http://hdl.handle.net/10019.1/86491
This item appears in the following collections: