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Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Hassen, Abubeker"
Now showing items 1-20 of 30
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(University of Pretoria, 2019)Plant growth promoting rhizobacteria (PGPR) are those bacteria that colonise the rhizosphere of various plants and promote growth either directly by improving nutrient uptake by the plant roots or indirectly through the ...
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(University of Pretoria, 2015)Shortage of quality feed is the major constraint in livestock production, particularly under smallholder subsistence farmer s conditions in sub-Saharan Africa. Livestock production under smallholder subsistence farmers ...
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(University of Pretoria, 2022)Climate change is expected to result in rainfall reduction in South African semi-arid and arid rangelands and may have severe ecological consequences. This rainfall reduction may cause irreversible and substantial ...
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(University of Pretoria, 2017)Shortage of quality feed is the major constraint in livestock production particularly under smallholder subsistence farmer’s conditions in sub-Saharan Africa, including South Africa. This is due to the fact that livestock ...
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(University of Pretoria, 2019)The present study investigated the effects of antioxidants supplementation, freezing extenders, cooling rates and equilibration times on Saanen buck reproductive performance and post-thaw sperm quality. For this reason, ...
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(University of Pretoria, 2019)Optimum reproduction performance of small ruminants managed under extensive production system can be influenced by the availability of nutrients, especially the mineral content of forages and reproductive management. The ...
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(University of Pretoria, 2023)A series of in vitro and in vivo experiments were conducted to evaluate the antimethanogenic properties of four medicinal plants (Aloe vera, Jatropha curcas, Moringa oleifera, and Piper betle) extracts as alternative rumen ...
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(University of Pretoria, 2018)A series of in vitro and in vivo experiments was conducted to evaluate the methane-reducing potential of some medicinal plant extracts in order to use them as alternative additives to replace antibiotics such as monensin. ...
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(University of Pretoria, 2021)There is growing apprehension about the use of antibiotics such as monensin in the reduction of enteric methane emissions. This has initiated the utilisation of multipurpose medicinal plants as an alternative, although ...
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(University of Pretoria, 2013)This research was conducted in order to enable primary producers to maximize the use of cheap roughage sources while still maintaining body weight during dry winter months when the crude protein (CP) content of roughage ...
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(University of Pretoria, 2021)Ruminants emit methane which is a concern worldwide as it is linked to global warming. Supplemental methane mitigation strategies can't be imple- mented unless their risks and benefits on carcass quality are known. Past ...
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(University of Pretoria, 2017)This study formed part of a greater departmental research project on methane mitigation strategies in livestock, fed poor quality feeds or kept under extensive grazing conditions. Globally, livestock represents a large ...
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(University of Pretoria, 2017)Exogenous fibrolytic enzymes present one way of improving fibre digestibility. Therefore, the aim of this study was to investigate the effect of adding different proportions of cellulase and xylanase enzyme mixtures on ...
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(University of Pretoria, 2015)The nutritional value of browse foliage from shrub and tree species in the Kalahari region of the Northern Cape, South Africa is not well quantified and analysed. In this study, nineteen browse (shrub and tree) species ...
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(University of Pretoria, 2013)This study was conducted in the Borana rangelands, southern Oromia, Ethiopia with the aim of investigating land-use/cover changes, rangeland condition and indentifying major change drivers in the rangelands. Satellite ...
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(University of Pretoria, 2019)The search for alternative feed additives for ruminants became essential due to restrictions on the use of antibiotics and synthetic growth promoters in the livestock industry, as well as extensive pressure on the farmers ...
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(University of Pretoria, 2023)Developing healthier and more practically applicable intervention strategies for methane (CH4) inhibition emitted from ruminants has been a priority issue globally. Among the strategies, the use of natural medicinal plants ...
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(University of Pretoria, 2011-11-21)This study was undertaken to determine the effects and nutritive value of Leucaena leucocephala when it was incorporated in a total mixed ration (TMR) fed to milk goats. This was to test the use of Leucaena to substitute ...
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(University of Pretoria, 2010-09-28)Four trials were conducted to evaluate the effects of ensiling whole plant maize with wet distillers grains with solubles (WDGS) on its preservation and nutritive value. In the first study, WDGS was blended with whole maize ...
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(University of Pretoria, 2022)Grazing land resources in the central highland of Ethiopia are shrinking due to deforestation, agricultural land expansion and continuous heavy grazing. Improved management of grazing lands necessitates the knowledge of ...
Now showing items 1-20 of 30