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Effect of acacia species leaf meal inclusion on methane emission and productivity of yearling male boer goats fed an avena sativa hay-based dietMathobela, Rebecca Mmamakgone January 2018 (has links)
Thesis (MSc. (Animal Production)) -- University of Limpopo, 2018 / A study was done to determine the effect of Acacia (A.) karroo, A. tortilis or A. nilotica leaf meal inclusion in a diet on methane emission and productivity of yearling male Boer goats fed a basal diet of Avena sativa hay. The first part of the study was conducted to determine and compare nutrient contents and tannin levels of A. karroo, A. tortilis and A. nilotica leaf meals and Avena sativa hay in a completely randomised design. The diets means were compared using Fisher’s least significant difference at the 5 % level of probability. The three Acacia species had higher (P<0.05) crude protein contents compared to Avena sativa hay, ranging from 12.42 to 14.49 %. No tannins were detected in Avena sativa hay. Among Acacia species, A. nilotica leaves had higher (P<0.05) total phenolic and total tannin contents than A. karroo and A. tortilis leaves, the latter being similar (P>0.05). All three Acacia species had similar (P>0.05) contents of condensed tannins, ranging from 1.49 to 1.76 %. However, only A. nilotica leaves had hydrolysable tannins of 128 mg/g.
The second part of the study was conducted to determine the effect of A. karroo, A. tortilis or A. nilotica leaf meal inclusion level on diet intake and digestibility, methane emission, productivity and blood profiles of yearling male Boer goats. A total of three experiments were conducted and different goats were used in each experiment. A grand total of thirty six (twelve per experiment) yearling male Boer goats with initial mean live weights of 23 ± 2 kg (experiment 1), 23 ± 2 kg (experiment 2) and 23 ± 2 kg (experiment 3) were used in 21-day experiments. The goats were randomly assigned to four dietary treatments, each containing A. karroo, A. tortilis or A. nilotica leaf meal inclusion levels at 10, 15, 20 and 30 % with Avena sativa hay as a basal diet. Each goat was housed in well-ventilated individual metabolic pen. The diets were replicated three times. The data collected were subjected to analysis of covariance and analysis of variance in a completely randomized design using SAS. Differences were separated at 5 % level of probability. Additionally, regression equations were used to determine the relationships and responses in optimal diet intake and digestibility, methane emission, productivity and blood profiles of yearling male Boer goats to differing inclusion levels of A. karroo, A. tortilis and A. nilotica leaf meal.
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Experiment 1 involved feeding different levels of A. karroo leaf meal inclusion to yearling male Boer goats fed Avena sativa hay as a basal diet. Results of methane emission before and during the experiment indicated that inclusion of A. karroo leaf meal in the diets of goats reduced (P<0.05) methane emission. Similarly, some of the blood parameters before and after experiment were affected (P<0.05) by inclusion of A. karroo leaf meal. However, A. karroo leaf meal inclusion level had no effect (P>0.05) on diet intake, methane emission, live weight changes and digestibility, except (P<0.05) for digestibility of crude fibre. Feed conversion ratio improved linearly with increased A. karroo leaf meal inclusion level.
In the case of experiment 2, results of methane emission before and during the experiment indicated that inclusion of A. tortilis leaf meal in the diets of goats reduced (P<0.05) methane emission. Similarly, some of the blood parameters before and after the experiment were affected (P<0.05) by inclusion of A. tortilis leaf meal. However, variation in A. tortilis leaf meal inclusion level had comparable effect (P>0.05) on methane emission, live weight changes and digestibility, except (P<0.05) for digestibility of crude protein and acid detergent fibre. Diet intake and feed conversion ratio were affected (P<0.05) by A. tortilis leaf meal inclusion level. A positive relationship was observed between A. tortilis leaf meal inclusion level and diet intake.
In experiment 3, results of methane emission before and during the experiment indicated that inclusion of A. nilotica leaf meal in the diets of goats reduced (P<0.05) methane emission. Similarly, some of the blood parameters before and the after experiment were affected (P<0.05) by inclusion of A. nilotica leaf meal. Apart from diet fat digestibility and feed conversion ratio, no statistical differences (P>0.05) were observed on diet intake, digestibility and live weight changes of goats fed A. nilotica leaf meal inclusion level. Positive relationships were observed between A. nilotica leaf meal inclusion level, diet fat digestibility and feed conversion ratio in male Boer goats.
The high crude protein and low tannin contents in A. karroo, A. tortilis and A. nilotica leaves indicate that these Acacia species can be safe to use as a source of protein in animal nutrition if used sparingly. It was noted that nutrient intake, digestibility,
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feed conversion ratio and blood profiles of Boer goats in the present study were optimised at different inclusion levels for all the three Acacia species. This may imply that inclusion levels of A. karroo, A. tortilis and A. nilotica leaf meals for optimal productivity will depend on the Acacia species used and, also, on particular productivity parameters in question. Although, A. karroo, A. tortilis and A. nilotica leaf meal reduced methane emission, optimal reduction in methane emission was not determined. Further validation is required to determine Acacia inclusion levels for optimal methane production and emission by goats. / NRF (National Research Foundation),
AGRISETA (Agricultural Sector and Education Training Authority) and
NSFAS (National Students Financial Aid Scheme)
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A comparative reading of the depiction of Afrikaner ancestry in two works by C.D. Bell / Richardt StrydomStrydom, Richardt January 2009 (has links)
This dissertation investigates the contradictions and similarities regarding the depictions of Afrikaner ancestry in two works by Charles Davidson Bell: The landing of Van Riebeeck, 1652 (1850) and Cattle boers' outspan (s.a.). The works were discussed and compared from a conventional perspective in order to establish the artworks' formal qualities, subject matter and thematic content This reading was extended by employing postcolonial theoretical principles in order to contextualise these two artworks within their Victorian ideological frameworks, social realities and authoring strategies. The extended comparative reading revealed a number of similarities and contradictions regarding the artist's depiction of Afrikaner ancestry in these two works. Postcolonial theory further facilitated a more comprehensive and dense reading of the chosen artworks, as well as of the artist's oeuvre. / Thesis (M.A. (History of Arts))--North-West University, Potchefstroom Campus, 2010.
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A comparative reading of the depiction of Afrikaner ancestry in two works by C.D. Bell / Richardt StrydomStrydom, Richardt January 2009 (has links)
This dissertation investigates the contradictions and similarities regarding the depictions of Afrikaner ancestry in two works by Charles Davidson Bell: The landing of Van Riebeeck, 1652 (1850) and Cattle boers' outspan (s.a.). The works were discussed and compared from a conventional perspective in order to establish the artworks' formal qualities, subject matter and thematic content This reading was extended by employing postcolonial theoretical principles in order to contextualise these two artworks within their Victorian ideological frameworks, social realities and authoring strategies. The extended comparative reading revealed a number of similarities and contradictions regarding the artist's depiction of Afrikaner ancestry in these two works. Postcolonial theory further facilitated a more comprehensive and dense reading of the chosen artworks, as well as of the artist's oeuvre. / Thesis (M.A. (History of Arts))--North-West University, Potchefstroom Campus, 2010.
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Nonnie de la Rey 1856-1923 (Afrikaans)Rowan, Zelda 12 October 2004 (has links)
In her lifetime Jacoba Elizabeth (Nonnie) de la Rey, née Greeff (1856-1923) was widely known not only for being the wife of the eminent General Koos de la Rey, but also for her exceptional tenacity during the Second Anglo-Boer War (1899-1902). From December 1900 to the conclusion of the war in May 1902 she and her children lived a nomadic life. Nonnie's experiences were recorded in her memoirs, Mijne omzwervingen en beproevingen gedurende den oorlog, which were published in Amsterdam in 1903. Shortly thereafter – also in 1903 – the English edition, A Woman's Wanderings and Trials During the Anglo-Boer War, as translated by Lucy Hotz, was published in Londen. The 18 months that Nonnie spent wandering through the country probably constitute the most important phase of her life, but she experienced a great deal more, which she recorded in another memoir. Her childhood and pioneer's life are well documented. At the age of eighteen Nonnie met Jacobus Herculaas de la Rey; they were married on 24 October 1876 and settled in the vicinity of Lichtenburg. The period from 1880 to 1899 constitute a kaleidoscope of events in Nonnie's life, for example the First Anglo-Boer War (1880-1881), the loss of Nonnie's father and mother, and a move to the farm Elandsfontein. The South African War broke out in 1899. Nonnie's life during the war years can be divided into two phases, namely the period when she lived in Lichtenburg (October 1899 to November 1900), and the period characterised as her wandering years (December 1900 to May 1902). Events in Nonnie de la Rey's life from 1902 to 1923 include their official visit to Europe, the restoration of Elandsfontein, Union (1910) and Koos de la Rey's political involvement, the Rebellion of 1914 and the death of Koos de la Rey. In her final years Nonnie was involved with various organisations. She was an eminent presence in her community, being revered as a “volksmoeder” by her compatriots. She died in 1923. / Dissertation (MHCS)--University of Pretoria, 2005. / Historical and Heritage Studies / unrestricted
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Grondleggende argitekte van die Departement Openbare Werke in Transvaal tot 1910, hul werk en invloed (Afrikaans)Minnaar, Enla Marie 17 January 2007 (has links)
The void in available literature pertaining to the origin of the official architecture of the 'Publieke Werken Departement' in the 'Zuid-Afrikaansche Republiek', the destruction of the Department by the Anglo Boer-War and the subsequent reconstruction of the Department as the Public Works Department of the Transvaal Colony, is addressed. A new perspective is set regarding the architectural data of the period, by analysis of the cultural doctrine of the different departments. The history of the Department is divided into four periods. The first deals with the era from the establishment of the Department in 1877, until the appointment of Sytze Wierda. The second incorporates the time from 1887 with his engagement up to the outbreak of the Anglo Boer-War in 1899. This period is generally seen as the golden age of Transvaal Republican architecture. The third relates the effect of the war on the Department and the architects while the fourth deals with the colonial time from the annexation of Pretoria in 1900, until Unification in 1910. The structure and work procedure of each department are examined to derive an image of the type of training the architects had undergone and a survey is made of what can be found of the original libraries of the departments. Specific careers are investigated. In this context, buildings are chosen from the researched lists, to be examined. The designated buildings are regarded as documents, and are analized with regard to cultural doctrine and business stance. The first period produced pragmatic thatched buildings. During the second phase, Wierda attained the embodiment of cultural doctrine in architecture, rising above mere utility in building. He strived to create a sophisticated, ideal townscape for the Z.A.R. Continuity was lacking, however, as the Department was at first brought to a standstill, and then wiped out by the war. During the fourth phase, the British Colonial Department brought about specialization of architects as quantity surveyors, engineers and architects. At first, only utility buildings were designed by the Department while prestige projects were given to private architectural firms. / Thesis (PhD (Architecture))--University of Pretoria, 2000. / Architecture / unrestricted
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Africa in Cleveland: Colonial Wars and Perceptions of Race and Empire in American NewspapersSelby, Amy Lynn 22 June 2012 (has links)
No description available.
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Die lewe, werk en invloed van F.V. Engelenburg in Suid-Afrika (1889 – 1938) / Linda EugéneBrink, Linda Eugen January 2015 (has links)
This dissertation is a historical biography of F.V. Engelenburg (1863-1938) and covers the
period from 1889 to 1938, when Engelenburg lived and worked in South Africa. The study
situates Engelenburg in the historical landscape of the Zuid-Afrikaansche Republiek during
the late nineteenth and early twentieth century. The focus is mainly on Engelenburg’s
journalistic career at De Volksstem, but attention is also given to his many other interests,
including the development and promotion of Afrikaans and the Afrikaans academic culture,
especially in the northern parts of South Africa. His work pertaining to the development of
architecture, literature, aviation, the visual and performing arts, history, libraries, museums
and educational institutions comes under the spotlight. His private life is considered as well
in order to portray his versatility as a person. The chapters have been subdivided to highlight
the variety of matters he was involved in, and a chronological approach has been followed as
is customary in a biography.
The study is based on archival research. In particular, Engelenburg’s private collections were
used, as well as the private collections of some of his contemporaries. Engelenburg assumes a
central place in the biography, with special focus on how he perceived and experienced
conditions and everyday life in South Africa from the point of view of his transnational
European background. His role as influential opinion-maker and political commentator on
local and international politics is highlighted. His ties with political leaders and his
involvement in government affairs are emphasised. The study also refers to his continued
contact with his motherland, the Netherlands, and with the Dutch language. After the Anglo-
Boer War, he realised that the languages of the future in South Africa would be Afrikaans
(not Dutch), alongside English. His continuing support for Afrikaans as a language of
instruction in schools and universities and the development of the Afrikaans literature, as well
as his support for the standardization of Afrikaans helped to establish Afrikaans as an official
language alongside English and Dutch in South Africa. Engelenburg’s active contribution to
the work of the Zuid-Afrikaanse Akademie voor Taal, Lettere en Kuns (now the Suid-
Afrikaanse Akademie vir Wetenskap en Kuns), helped to put the organization on a sound
footing for future development. The Akademie can be seen as a living monument to his work
in South Africa. / PhD (History)--North-West University, Vaal Triangle Campus, 2015.
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Die lewe, werk en invloed van F.V. Engelenburg in Suid-Afrika (1889 – 1938) / Linda EugéneBrink, Linda Eugen January 2015 (has links)
This dissertation is a historical biography of F.V. Engelenburg (1863-1938) and covers the
period from 1889 to 1938, when Engelenburg lived and worked in South Africa. The study
situates Engelenburg in the historical landscape of the Zuid-Afrikaansche Republiek during
the late nineteenth and early twentieth century. The focus is mainly on Engelenburg’s
journalistic career at De Volksstem, but attention is also given to his many other interests,
including the development and promotion of Afrikaans and the Afrikaans academic culture,
especially in the northern parts of South Africa. His work pertaining to the development of
architecture, literature, aviation, the visual and performing arts, history, libraries, museums
and educational institutions comes under the spotlight. His private life is considered as well
in order to portray his versatility as a person. The chapters have been subdivided to highlight
the variety of matters he was involved in, and a chronological approach has been followed as
is customary in a biography.
The study is based on archival research. In particular, Engelenburg’s private collections were
used, as well as the private collections of some of his contemporaries. Engelenburg assumes a
central place in the biography, with special focus on how he perceived and experienced
conditions and everyday life in South Africa from the point of view of his transnational
European background. His role as influential opinion-maker and political commentator on
local and international politics is highlighted. His ties with political leaders and his
involvement in government affairs are emphasised. The study also refers to his continued
contact with his motherland, the Netherlands, and with the Dutch language. After the Anglo-
Boer War, he realised that the languages of the future in South Africa would be Afrikaans
(not Dutch), alongside English. His continuing support for Afrikaans as a language of
instruction in schools and universities and the development of the Afrikaans literature, as well
as his support for the standardization of Afrikaans helped to establish Afrikaans as an official
language alongside English and Dutch in South Africa. Engelenburg’s active contribution to
the work of the Zuid-Afrikaanse Akademie voor Taal, Lettere en Kuns (now the Suid-
Afrikaanse Akademie vir Wetenskap en Kuns), helped to put the organization on a sound
footing for future development. The Akademie can be seen as a living monument to his work
in South Africa. / PhD (History)--North-West University, Vaal Triangle Campus, 2015.
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Die Britse owerheid en die burgerlike bevolking van Heidelberg, Transvaal, gedurende die Anglo-Boereoorlog (Afrikaans)Pretorius, Willem Jacobus 01 July 2008 (has links)
Op 23 Junie 1900 het die Britse troepe Heidelberg beset. Die rustige bestaan het vir spanning onder die burgerlikes en agterdog teenoor die Britse militêre owerheid plek gemaak. Inwoners soos ds. A.J. Louw, wat geweier het om die Eed van Neutraliteit te teken, is onverwyld uit die dorp verban. Vroue soos Issie Kriegler en Cassie O’Reilly, wat met hulle uitgesprokenheid die gramskap van die Britte ontketen het, is saam met hulle gesinne na die konsentrasiekamp by Merebank in Natal gestuur. Aangesien die beëindiging van die oorlog vir die Britse owerheid belangrik was, het distrikskommissaris J.M. Vallentin Heidelbergse wapenneerlêers gebruik om die burgers tot oorgawe te oorreed en voorstelle vir die bereiking van vrede aan die hand te doen. As deel van die verskroeide aarde-beleid is Boerevroue en kinders wat sonder heenkome was, na die blanke konsentrasiekamp op Heidelberg geneem, waar hulle getalle mettertyd tot ongeveer 2 000 aangegroei het. Die Heidelbergse kampowerhede het die aankomelinge van tente voorsien terwyl higiëniese maatreëls en mediese dienste vir liggaamlike welsyn ingestel is. Siektes het uitgebreek. Die pogings van die Britse medici om die sterftesyfer met Westerse medikasie en voorskrifte vir beter voeding aan kinders te verlaag, het allesbehalwe seepglad verloop onder meer vanweë die Boerevroue se wantroue in hulle. Voor die Anglo-Boereoorlog was die gemeentelike lewe besonder aktief. Met die Britse oorname het eredienste, bediening van die doop en katkisasie in die susterskerke op Heidelberg op 'n gereelde grondslag voortgegaan. Godsdiensoefening in die konsentrasiekamp is ook nie agterweë gelaat nie. Fasiliteite is vir die gemeentelike aktiwiteite van die drie susterskerke beskikbaar gestel. Ook het die Britse kerke op Heidelberg, die St. Ninian’s Anglican Church en die Wesleyan Methodist Church, ‘n bloeitydperk beleef, terwyl die Berlynse Sendinggenootskap sy werksaamhede gestaak het. Teen 1902 is die kampinwoners toegelaat om dienste in hulle gemeentes op die dorp by te woon. Onderwys het met die Britse besetting ‘n nuwe tydvak betree. Die kampskool het saam met die skoolgeldheffende skole en die “free schools” op die dorp daartoe bygedra om die grondslag vir ‘n Britse onderwysstelsel in Transvaal te lê. Ingevoerde Britse onderwysers het nuwe wêrelde vir die kampkinders ontsluit, wat hulle tot verdere intellektuele ontwikkeling sou aanspoor. Die kampskole, waarby ook volwassenes gebaat het, was ‘n ligpunt in die bestaan van die konsentrasiekampe. Tot onlangs was min oor die swart konsentrasiekampe in die Heidelbergdistrik bekend. Toestande in hierdie kampe het na hulle oorname deur die Departement van Naturellevlugtelinge in Junie 1901 verbeter. Swartes is deur die leër en privaat huishoudings in diens geneem. Sommige was selfversorgend deurdat hulle mielies en ander gewasse produseer het. Die swart kamp op Heidelberg se sterftesyfer was laag. Dit is waarskynlik aan die goeie werk van die mediese offisier, ene Stewart, te danke. Hervestiging van blanke en swart kampinwoners het na afloop van die oorlog in Mei 1902 gevolg. Met Britse hulp en danksy rantsoene wat aan hulle uitgereik is, kon hulle huiswaarts keer. Dit blyk dat Heidelberg se blanke konsentrasiekamp relatief goed bestuur is en vanweë sy lae sterftesyfer onder die beter kampe tel. / Thesis (DPhil (History))--University of Pretoria, 2008. / Historical and Heritage Studies / unrestricted
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Landskapskildering as ver-beeld-ing van die liminale in geselekteerde werke van Pauline Gutter / Willem Pretorius VenterVenter, Willem Pretorius January 2014 (has links)
This dissertation presents an investigation into three works by the South African artist Pauline Gutter (b. 1980) that were originally shown in her exhibition Opslag (2008) [this title is almost impossible to translate; it can refer to the sound of a gun, or it can mean to butcher something; it has an association of suddenness]. The works that were selected for scrutiny in this dissertation are Uit die blou van onse hemel [translated as From our blue skies; or Ringing out of our blue heaven – the first words of the erstwhile South African anthem] (2004), Into the landscape I (2007), and Landskap naby Zastron [Landscape close by Zastron] (2006). The choice of works was based on the particular mode of and imaginative re-presentation of the landscape that can be discerned in each of these works – different, yet conceptually quite similar. I argue that Gutter‟s landscape works in the exhibition Opslag (as representative of the thematic concerns of the show as a whole) are indicative of an imaginative re-presentation of a liminal experience (which is informed to a large degree by the artist‟s acute awareness of the threat posed by cruel and rampant attacks on the farming community). This liminal experience, as embodied in the artworks, is in its turn a reflection of the liminal existence as lived and interpreted by the artist‟s perception of her environment and community – speficially, the Boer farming community of South Africa, and even more specificially, in the Free State Province. Those aspects of a liminal experience that can be gleaned from a reading of the selected works Uit die blou van onse hemel, Into the landscape, and Landskap naby Zastron, are powerlessness, instability, the transitory shift of status, disorientation, isolation, marginalisation, and uncertainty. I argue, furthermore, that the imaginative re-presentation of the liminal experience is achieved by means of certain strategies and approaches towards landscape painting that are associated with the sublime. Where the sublime, in the context of the re-presentation of the landscape is often associated with a sense of being overwhelmed, even with awe, I demonstrate that Gutter achieves what Coetzee (1988:49) refers to as a singularly distinct understanding of the sublime with reference to the unique character of the South African landscape. In this sense, specific themes associated with the sublime (portraying things like problems, the sudden and the unexpected, darkness [that connotes uncertainty], danger, fearsomeness, and emptiness [that relates to isolation]) can be related with elements of the liminal. By identifying the themes of sublime representation, the reading of the works demonstrate firstly Gutter‟s unique and distinct application of sublime landscape painting. Secondly, it emerges that the portrayal of the liminal is achieved by means of these strategies towards landscape painting, and thirdly, that the imaginative re-presentation of the liminal is suggestive of a particular dimension of the existence of the contemporary Boer/farming community. Gutter‟s reflection of and on the landscape demonstrate a particularly poignant projection of a theme onto the landscape, and seems to suggest that while the liminal experience is potentially a place of growth and renewal, it can also induce a sense of paralysis as a result of the overwhelming uncertainty experienced by the particular community. / MA (History of Art), North-West University, Potchefstroom Campus, 2014
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