Esta tese objetiva investigar a gestão local e as características significativas do desenvolvimento rural em comunidades de pecuaristas familiares nos municípios de São Jerônimo, Butiá e arredores, região Centro Sul do RS. Nesta tese, as dinâmicas do desenvolvimento rural na pecuária familiar são compreendidas como movimentos de transição ou contracorrente à marcha de consolidação e aprofundamento da agricultura convencional assentada em parâmetros do paradigma técnico-científico moderno. Na realidade estudada os pecuaristas familiares foram elevados da posição de marginalizados e periféricos à condição de segmento central na rede rural de desenvolvimento, reavaliados pela sua importância social, ambiental e econômica na relação que estabelecem com a sociedade local e regional, e com os ecossistemas campestres riograndenses, atualmente fortemente impactados por processos de degradação. Entendendo o DR como um movimento transicional e contracorrente esta tese utiliza componentes analítico-metodológicos fornecidos pela Perspectiva Multinível-PMN, em especial a ferramenta Gestão Estratégica de Nicho-GEN, e os elementos para pensar o desenvolvimento rural contemporâneo, tais como o seu caráter multinível, a noção de rede rural multidimensional, a multifuncionalidade da agricultura e o papel dos agricultores camponeses. Os procedimentos metodológicos são realizados através de revisão bibliográfica, coleta de dados secundários, entrevistas semi-estruturadas com informantes-chave e observação participante da paisagem rural, unidades produtivas, e das práticas e trajetórias, incluindo registro fotográfico. O referencial teórico utilizado fornece aportes para tratar a experiência local na perspectiva de uma dinâmica de DR que ocorre no nível micro, metodologicamente definida como um espaço protegido de desenvolvimento da pecuária familiar, posicionada sob condicionantes estruturais mais amplos e influentes compostos pelos regimes sociotécnicos prevalentes e paisagens sociotécnicas. Apesar da consolidação e maior estruturação dos níveis elevados, existe interdependência e mutua interação entre o que acontece nos níveis micro e macro. Quanto à gestão identificam-se três alinhamentos principais na rede rural: infraestrutura e qualidade de vida; melhoria genética dos animais e do manejo do campo e dos rebanhos; e agregação de valor e governabilidade dos mercados. Avalia-se que apesar dos alinhamentos notáveis existem dissensos e incongruências. Mesmo nos alinhamentos de estratégias e expectativas mais vigorosos que ocorrem em melhoramento genéticos dos ovinos e bovinos; criação de novos mercados; e na percepção do campo nativo como um recurso valioso, produtivo e barato, acontecem incongruências importantes. As transformações mais marcantes do DR são identificadas como: novidades; práticas e trajetórias em governabilidade dos mercados; aspectos atinentes à sustentabilidade e endogeneidade; e questões relativas à dimensão social da rede rural. Nesta tese, os agricultores familiares que se dedicam à pecuária são avaliados como capazes de conciliar de maneira proveitosa a conservação e o uso sustentável dos recursos forrageiros nativos, enfatizando o caráter multifuncional dos seus estilos de agricultura baseados, primordialmente, em recursos da natureza, em co-produção e co-evolução. Apesar desta destacada característica positiva, deficiências em capacitação, práticas de manejo e intensificação no emprego de alguns insumos exógenos industriais modernos impedem que estes impactos positivos sejam mais fortes sobre o ambiente e sociedade. No final, são tecidas considerações sobre possíveis estratégias e políticas públicas para o aprimoramento da experiência local, as quais se esperam possam servir também em outros casos e situações. / This thesis aims to investigate local management and significant features of rural development in family beef cattle breeders’ communities in the municipalities of São Jerônimo, Butiá and surroundings, Central South region of RS. In this thesis, the dynamics of rural development in the family livestock are understood as transitional or counter-current movements to the consolidation and deepening of conventional agriculture seated on parameters of the modern technical-scientific paradigm. In the studied reality, family beef cattle breeders were elevated from a marginalized and peripheral position to a central segment condition in the rural development web, reassessed for their social, environmental and economic importance in the relationship they establish with the local and regional society and native grassland ecosystems of the Rio Grande do Sul State, currently heavily impacted by degradation processes. Understanding RD as a transitional or counter-current movement this thesis uses analytical and methodological components provided by Multilevel Perspective, particularly the Strategic Management Niche, and the elements to think contemporary rural development, such as its multilevel character, the notion of multidimensional rural web, multifunctional agriculture and role of peasant farmers. Methodological procedures are performed through literature review, secondary data collection, semi-structured interviews to key informants and participant observation of countrysides, farms, and practices and trajectories. The theoretical framework utilized provides contributions to treat local experience in a dynamic perspective of RD occurring at the micro level, methodologically defined as a development niche of family farming, positioned under broader and more influential structural constraints, such as prevalent socio-technical regimes and socio-technical landscape. Despite the consolidation and greater structuring of the higher levels, there is interdependence and mutual interaction between what happens at micro and macro levels. Related to management there are three major alignments in the rural web: infrastructure and quality of life; genetic improvement of livestock and of natural grassland and domestic flocks management; the adding value and governability of markets. It’s considered that even though the notable alignments there are disagreements and inconsistencies as well. Even in the alignments most vigorous strategies and expectations, such as genetic improvement of sheep and cattle; creation of new markets, and in perception of natural pasture as valuable, productive and cheap resource, there are important inconsistencies. The most striking changes of RD are identified as: novelties; governability of markets; aspects referent to sustainability and endogeneity; and issues relating to social dimension of rural web. In this thesis, family farmers dedicated to livestock are assessed as able to reconcile profitably conservation and sustainable use of natural forage resource, emphasizing the multifunctionality of their farming styles based primarily on natural resources, on co-production and co-evolution. Despite this remarkable positive feature, deficiencies in training, management practices, and increased use of some modern industrial exogenous inputs prevent these positive impacts to be stronger on the environment and society. In the end, considerations are made about possible strategies and public policies for the improvement of local experience, which are expected to be also used in other cases and situations.

Made available in DSpace on 2016-12-08T16:24:06Z (GMT). No. of bitstreams: 1 PGCV07MA048.pdf: 2534646 bytes, checksum: 9ccc6e39362dcc90e7ad0070a0d03f75 (MD5) Previous issue date: 2007-10-05 / This report describes the occurrence of four natural outbreaks of Infectious Bronchitis (IB) accompanied by nephritis and pectoral myopathy. The objectives are to describe the macro and microscopical injuries of the kidneys and muscle. Three outbreaks affected different flocks of broilers. One case occurred in broiler breeders affecting two houses of a farm. In the broilers, high mortality and high index of discarding was observed and also high condemnation in the abattoir. Respiratory snicks, apathy and ununiformity were observed. In the flock of broiler breeders, decline of production and high mortality were noticed. All the animals where positive for IB serology, and positive results were also obtained on the flock where PCR was carried through. In the necropsy, swollen and renal pallor were observed, pallor and white streaks mainly of the deep pectoral muscles, and in some cases mild edema. In the histopathology examination, the kidney injuries consisted of moderate to intense glomerular hyperplasia, in some cases interstitial multifocal inflammatory infiltrate and tubular degeneration. In the muscle, interstitial edema was found, hyaline degeneration, vacuolation, hypercontraction and myophagia of the muscle fibres. In one case, moderate fibrosis was observed. In other cases, mild to moderate lymphocytic infiltration was observed in the trachea. In the broiler breeders, other than the described lesions, a peribrochial lymphoid hyperplasia and hyaline degeneration was noted in the pulmonary vessels. In all the cases a close relation was observed between renal and muscular injury / Relata-se a ocorrência de quatro surtos espontâneos de Bronquite Infecciosa (BI) cursando com nefrite e miopatia peitoral objetivando descrever as lesões macro e microscópicas do rim e músculo. Três surtos ocorreram em frangos de corte afetando diversos lotes. Um surto ocorreu em matrizes afetando dois núcleos de criação. Nos frangos de corte, foi observado em alguns lotes alta mortalidade, alto índice de descarte e em outros alta condenação no abatedouro. Também observou-se, ronquidão, apatia e desuniformidade. No lote de matriz, foi observada queda de produção e mortalidade elevada. Todos os animais em que foi realizada sorologia foram positivos para BI, o mesmo para o lote em que foi realizada PCR. Na necropsia, observou-se tumefação e palidez renal, palidez e estrias esbranquiçadas principalmente do músculo peitoral profundo, e em alguns casos leve edema. No exame histopatológico, as lesões renais consistiam de hiperplasia glomerular de moderada a intensa, em alguns casos degeneração tubular e infiltrado inflamatório multifocal intersticial. No músculo, foi observado edema intersticial, degeneração hialina, vacuolização, hipercontração e miofagia de fibras musculares. Em um caso observou-se fibrose moderada. Em outros foram observadas infiltração linfocitária de leve a moderada na traquéia. Nas matrizes, além das lesões descritas, observou-se hiperplasia linfóide peribronquial e degeneração hialina nos vasos pulmonares. Em todos os casos foi observada uma estreita relação entre lesão renal e muscular

Esta tese objetiva investigar a gestão local e as características significativas do desenvolvimento rural em comunidades de pecuaristas familiares nos municípios de São Jerônimo, Butiá e arredores, região Centro Sul do RS. Nesta tese, as dinâmicas do desenvolvimento rural na pecuária familiar são compreendidas como movimentos de transição ou contracorrente à marcha de consolidação e aprofundamento da agricultura convencional assentada em parâmetros do paradigma técnico-científico moderno. Na realidade estudada os pecuaristas familiares foram elevados da posição de marginalizados e periféricos à condição de segmento central na rede rural de desenvolvimento, reavaliados pela sua importância social, ambiental e econômica na relação que estabelecem com a sociedade local e regional, e com os ecossistemas campestres riograndenses, atualmente fortemente impactados por processos de degradação. Entendendo o DR como um movimento transicional e contracorrente esta tese utiliza componentes analítico-metodológicos fornecidos pela Perspectiva Multinível-PMN, em especial a ferramenta Gestão Estratégica de Nicho-GEN, e os elementos para pensar o desenvolvimento rural contemporâneo, tais como o seu caráter multinível, a noção de rede rural multidimensional, a multifuncionalidade da agricultura e o papel dos agricultores camponeses. Os procedimentos metodológicos são realizados através de revisão bibliográfica, coleta de dados secundários, entrevistas semi-estruturadas com informantes-chave e observação participante da paisagem rural, unidades produtivas, e das práticas e trajetórias, incluindo registro fotográfico. O referencial teórico utilizado fornece aportes para tratar a experiência local na perspectiva de uma dinâmica de DR que ocorre no nível micro, metodologicamente definida como um espaço protegido de desenvolvimento da pecuária familiar, posicionada sob condicionantes estruturais mais amplos e influentes compostos pelos regimes sociotécnicos prevalentes e paisagens sociotécnicas. Apesar da consolidação e maior estruturação dos níveis elevados, existe interdependência e mutua interação entre o que acontece nos níveis micro e macro. Quanto à gestão identificam-se três alinhamentos principais na rede rural: infraestrutura e qualidade de vida; melhoria genética dos animais e do manejo do campo e dos rebanhos; e agregação de valor e governabilidade dos mercados. Avalia-se que apesar dos alinhamentos notáveis existem dissensos e incongruências. Mesmo nos alinhamentos de estratégias e expectativas mais vigorosos que ocorrem em melhoramento genéticos dos ovinos e bovinos; criação de novos mercados; e na percepção do campo nativo como um recurso valioso, produtivo e barato, acontecem incongruências importantes. As transformações mais marcantes do DR são identificadas como: novidades; práticas e trajetórias em governabilidade dos mercados; aspectos atinentes à sustentabilidade e endogeneidade; e questões relativas à dimensão social da rede rural. Nesta tese, os agricultores familiares que se dedicam à pecuária são avaliados como capazes de conciliar de maneira proveitosa a conservação e o uso sustentável dos recursos forrageiros nativos, enfatizando o caráter multifuncional dos seus estilos de agricultura baseados, primordialmente, em recursos da natureza, em co-produção e co-evolução. Apesar desta destacada característica positiva, deficiências em capacitação, práticas de manejo e intensificação no emprego de alguns insumos exógenos industriais modernos impedem que estes impactos positivos sejam mais fortes sobre o ambiente e sociedade. No final, são tecidas considerações sobre possíveis estratégias e políticas públicas para o aprimoramento da experiência local, as quais se esperam possam servir também em outros casos e situações. / This thesis aims to investigate local management and significant features of rural development in family beef cattle breeders’ communities in the municipalities of São Jerônimo, Butiá and surroundings, Central South region of RS. In this thesis, the dynamics of rural development in the family livestock are understood as transitional or counter-current movements to the consolidation and deepening of conventional agriculture seated on parameters of the modern technical-scientific paradigm. In the studied reality, family beef cattle breeders were elevated from a marginalized and peripheral position to a central segment condition in the rural development web, reassessed for their social, environmental and economic importance in the relationship they establish with the local and regional society and native grassland ecosystems of the Rio Grande do Sul State, currently heavily impacted by degradation processes. Understanding RD as a transitional or counter-current movement this thesis uses analytical and methodological components provided by Multilevel Perspective, particularly the Strategic Management Niche, and the elements to think contemporary rural development, such as its multilevel character, the notion of multidimensional rural web, multifunctional agriculture and role of peasant farmers. Methodological procedures are performed through literature review, secondary data collection, semi-structured interviews to key informants and participant observation of countrysides, farms, and practices and trajectories. The theoretical framework utilized provides contributions to treat local experience in a dynamic perspective of RD occurring at the micro level, methodologically defined as a development niche of family farming, positioned under broader and more influential structural constraints, such as prevalent socio-technical regimes and socio-technical landscape. Despite the consolidation and greater structuring of the higher levels, there is interdependence and mutual interaction between what happens at micro and macro levels. Related to management there are three major alignments in the rural web: infrastructure and quality of life; genetic improvement of livestock and of natural grassland and domestic flocks management; the adding value and governability of markets. It’s considered that even though the notable alignments there are disagreements and inconsistencies as well. Even in the alignments most vigorous strategies and expectations, such as genetic improvement of sheep and cattle; creation of new markets, and in perception of natural pasture as valuable, productive and cheap resource, there are important inconsistencies. The most striking changes of RD are identified as: novelties; governability of markets; aspects referent to sustainability and endogeneity; and issues relating to social dimension of rural web. In this thesis, family farmers dedicated to livestock are assessed as able to reconcile profitably conservation and sustainable use of natural forage resource, emphasizing the multifunctionality of their farming styles based primarily on natural resources, on co-production and co-evolution. Despite this remarkable positive feature, deficiencies in training, management practices, and increased use of some modern industrial exogenous inputs prevent these positive impacts to be stronger on the environment and society. In the end, considerations are made about possible strategies and public policies for the improvement of local experience, which are expected to be also used in other cases and situations.

A l’extrême nord du Chili, dans la région d’Arica-Parinacota, ce travail de recherche, axé sur l’étude de trois abris ornés (Vilacaurani, Incani et Anocariri), vise à mettre en évidence les étapes de la transformation culturelle et socio-économiques des populations andines en lien avec le processus de la domestication animale. Entre 2800 et 3800 m dans le piémont andin, l’implantation humaine semble correspondre à l’écosystème de certaines espèces, telles que le guanaco et le taruca, abondamment chassées pendant les périodes les plus anciennes. Les plus importants témoignages, actuellement connus, de cette occupation se retrouvent au cœur d’abris sous roche ou sur de larges panneaux à travers d’imposantes fresques polychromes. Les artistes ont mis l’accent sur la figure animale, principalement les camélidés de genre lama (guanaco et lama) et sur la représentation de scènes variées telles la chasse, le piégeage ou encore la pâture. Ces représentations sont significatives, car elles évoquent des possibles phases de la domestication des camélidés qui a débuté autour de 6000 BP dans les Andes centrales (Wings, 1986 ; Wheeler et al., 1977 ; Lavallée et Julien, 1980 ; Lavallée et al., 1995) débouchant sur le développement des sociétés pastorales et d’une économie de production dans les hautes terres andines. Pourtant, les mécanismes de cette transformation restent encore mal connus. Cette recherche offre une nouvelle lecture des manifestations artistiques comme source première d’information pour comprendre la transition socio-économique et culturelle des populations des hautes terres. A travers l’étude des scènes picturales et l’imposant système de superposition des figures, nous sommes en mesure de décrire le glissement progressif, autant sur le plan technique que symbolique, et les étapes transitoires qui caractérisent le passage d’une économie principalement fondée sur la chasse à une économie pastorale. / In the far north of Chile, in the region of Arica-Parinacota, this research, centered on the study of three decorated shelters (Vilacaurani, Incani and Anocariri), aim at highlighting the socioeconomic and cultural stages of the transformation of the Andean populations in connection with the process of the animal domestication. Between 2800 and 3800 m in Andean Piedmont, the human settling seems to correspond to the ecosystem of certain species such as the guanaco and the taruca abundantly hunted during the most ancient periods. The most important testimonies of this activity, so far known, are found at the heart of shelters or on wide panels through impressive polychromatic frescoes. The artists put the accent on the animal figure, mainly Camelidae of the genus Lama (guanaco and llama) and on the representation of varied scenes such hunting, capture or grazing. These representations are significant because they evoke possible phases of the Camelid’s domestication which began around 6000 BP in the central Andes (Wings, 1986 ; Wheeler et al., 1977 ; Lavallée et Julien, 1980 ; Lavallée et al., 1995) which result in the development of the pastoral societies and the economy of production in the Andean highlands. Nevertheless, mechanisms working in this transformation remain badly known. This research offers a new reading of the artistic manifestations as first source of information to understand the socioeconomic and cultural transition of the populations in the highlands. Through the study of the pictorial scenes and the impressive system of overlapping of figures, we are capable of describing the progressive sliding, both on the technical plan and the symbolism, and the transitory stages which characterize the passage of an economy mainly based on hunting to a pastoral economy.

Orientador: Irenilza de Alencar Naas / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola / Made available in DSpace on 2018-08-06T17:11:09Z (GMT). No. of bitstreams: 1 Salgado_DouglasD'Alessandro_M.pdf: 1159784 bytes, checksum: 04b0448382e6168d211ac0d4f2949f23 (MD5) Previous issue date: 2006 / Resumo: O estudo de reprodutoras de frangos de corte é de grande importância para o país, uma vez que o frango de corte é o terceiro maior item agropecuário em exportação, e o Brasil, o segundo maior exportador do mundo desta carne. O estudo de comportamento de matrizes é de interesse científico, por buscar padrões que possam determinar saúde e bem-estar nessas aves. O galpão de produção deve fornecer um ambiente interno que venha de encontro com as necessidades do conforto térmico das aves. Este trabalho teve como objetivo a implementação de ferramentas e metodologia de análise estatística, que sirva de base para a criação de um sistema de monitoramento eletrônico de comportamento. O trabalho foi desenvolvido com dados coletados em ambiente controlado, utilizando a linhagem Hybro - PG, submetidas a diferentes níveis de temperatura, energia de ração e idade. Os dados foram tabulados utilizando os softwares Minitab@ e SAS@. Foram procedidas as análises descritiva e exploratória e, posteriormente, a modelagem - utilizando as Equações de Estimação Generalizadas (EEG). A pesquisa permitiu o desenvolvimento de modelos estatísticos de simulação e predição de comportamento de matrizes pesadas, que possibilitam a criação de um sistema inteligente para acionamento de sistemas de controle de ambiente em galpões de produção, inclusive com indicativo de bem-estar / Abstract: The study of female broiler breeders is of great importance for the country as broiler production is the third largest export item, and Brazil is the world second largest producer. The study of female breeder behavior is of scientific interest as it searches of specific pattern that may determine health and welfare in those birds. Production housing needs to provide inside environmental conditions that reaches bird's thermal comfort. This research has as objective the implementation of statistical and methodology analysis tools that may contribute to develop a system of electronic behavior monitoring. The experiment was developed with data collected under controlled environmental conditions, using birds from one genetic, and submitted to three distinct levels of ambient temperature, feed energy and age. Data were organized and processes using the software Minitab@ and SAS@. The descriptive, and exploratory analysis were applied, and afterwards the modeling - using the Generalized Estimate Equation. This research allowed the development of simulation statistical models for predicting female broiler breeders behavior, that may permit the building of an expert system for controlling production housing environment, as well as an indicative of welfare / Mestrado / Construções Rurais e Ambiencia / Mestre em Engenharia Agrícola

O presente trabalho teve como objetivo estimar a variabilidade genética existente entre touros e linhagens da raça Nelore, essas representadas pelos grandes genearcas, no que se refere à qualidade de carcaça e de carne. Os animais utilizados para coleta de dados de carcaça e carne pertenciam ao projeto de melhoramento genético e de avaliação para emissão de CEIP - Certificado Especial de Identificação e Produção, da Agro-Pecuária CFM-Ltda, e tinham idade entre 21 e 28 meses. Foram analisadas as características peso de carcaça quente (PCQ), área de olho de lombo (AOL), espessura de gordura subcutânea (EGS) e marmoreio (MAR). A qualidade de carne foi avaliada para os períodos de 7, 14 e 21 dias de maturação, quanto às perdas por exsudação (PE), perdas por cozimento (PC) e maciez (MAC). A avaliação da variabilidade genética entre linhagens foi efetuada com base em valores das diferenças esperadas na progênie (DEP) para as características PCQ, AOL, EGS, MAR e MAC aos 7, 14 e 21 dias de maturação. Foi encontrada variabilidade entre os touros e as linhagens estudadas sugerindo que um progresso genético pode ser conseguido pela seleção de animais para características de carcaça e carne dentro da raça Nelore. / The present study had as objective to estimate the genetic variability between steers and breed lines of Nellore, these represented by the greatest breeders, referred to carcass and beef quality. The animals used to collect the samples of carcass and beef belonged to the project of genetic improvement and evaluation to emission of CEIP-Special Certificate of Identification and Production of CFM Farm-Ltda. The animals had age between 21 and 28 months. Were analyzed the characteristics of hot carcass weight (PCQ), rib eye area (AOL), backfat thickness (EGS), marbling (MAR).The beef quality was evaluated for the periods of 7, 14 and 21 days of ageing, as reference the drip loss (PE), cooking loss (PC) and tenderness (MAC). The evaluation of the genetic variability between the breed lines was done based in the values of the expected progeny differences (DEP) of the characteristics of PCQ, AOL, EGS, MAR and MAC at days 7, 14 and 21 of ageing. There was found a variability between steers and the breed lines studied, suggesting that a genetic process may be possible by selecting the animals to carcass and beef characteristics in the Nellore breed.

Made available in DSpace on 2014-08-20T13:44:25Z (GMT). No. of bitstreams: 1 dissertacao_jean_carlos_cirino.pdf: 387867 bytes, checksum: 5c3bb5afc470b0617ca833072e543dd0 (MD5) Previous issue date: 2010-12-20 / The soy beans market is adjusting a restructuring since the liberation of Roundup Ready® (RR) technology by federal government in Brazil. In the latest years, the sector started to increase the internal sales, through the agriculturists consciousness about the seeds, more productive and with higher technology than pirate seeds. However, the seed market, many times is evaluated through empirical numbers that end up not representing the exact tendencies of the sector. This study has as a goal a detailed evaluation of numbers that move this market. For this it was used as a reference basis two documents sent by seed farmers to the MAPA: the relation of fields for seeds production (RC), and the production and seeds business (MP). Both documents are processed by APASSUL according to the term of technical cooperation among MAPA(SEFIA/RS), CSM and APASSUL. The observed notes are about the crops in 2005/2006, 2006/2007 and 2007/2008. The results presented a growth in legal seeds production and business, confirming the growth in the sector. It was also possible to note the new breeders that have been growing in this market. About the cultivars usage, that previously, was restrict to some materials, the scenario shows an increasing stratification with similar tendency verified in the market participation as a breeder. Note that for every hectare approved less than a half ton of seeds is commercialized, and low level of marketing is the highest risk factor. / O mercado de sementes de soja está ajustando uma reestruturação, desde a liberação, pelo Governo Federal, da tecnologia RoundupReady® (RR)no Brasil. Nesses últimos anos, o setor começou a incrementar as vendas internas, através da conscientização dos agricultores, quanto ao uso de sementes, mais produtivas e com tecnologias superiores às sementes piratas. No entanto, o mercado de sementes, muitas vezes, é avaliado através de números empíricos, que acabam não representando as tendências exatas do setor. Neste sentido o presente estudo objetiva uma avaliação detalhada dos números que movimentam esse mercado. Para isso, utilizaram-se como base de referência, dois documentos encaminhados pelos produtores de sementes ao MAPA: a Relação de Campos para Produção de Sementes (RC) e o Mapa de Produção e Comercialização de Sementes (MP). Ambos os documentos são processados pela APASSUL, em função de termo de cooperação técnica entre MAPA(SEFIA/RS), CSM e APASSUL. As observações realizadas referem-se às safras 2005/2006, 2006/2007 e 2007/2008. Os resultados apresentaram um aumento na produção e comercialização de sementes legais, confirmando o crescimento do setor. Observou-se, também, que novos obtentores vêm ganhando mercado. Quanto ao uso de cultivares que, anteriormente, se restringia a algumas, o cenário aponta para uma crescente estratificação, com tendência semelhante à verificada na participação de mercado por obtentor. Nota-se que para cada hectare aprovado se comercializa na média menos de uma tonelada de semente, sendo o baixo índice de comercialização o fator de maior peso.

Quatro experimentos foram conduzidos com o objetivo de avaliar o efeito da forma física da ração pré-inicial no desempenho e na alometria de órgãos do sistema digestório de frangos de corte, provenientes de ovos de pesos semelhantes ou distintos, produzidos por matrizes Ross de idades diferentes. Foram utilizados 2.340 ovos para os experimentos 1 e 2 e 2.160 ovos para os experimentos 3 e 4. A composição percentual dos ovos foi avaliada. Os experimentos 1 e 2, assim como os experimentos 3 e 4, ocorreram simultaneamente. O experimento 1 contou com 1.380 pintos de um dia, machos e fêmeas sexados, provenientes de ovos com peso médio de 57,8 g ou 68,8 g, de matrizes com, respectivamente, 29 e 55 semanas. O experimento 3 contou com 1.380 aves provenientes de matrizes com 29 e 55 semanas de idade, sendo o peso médio dos ovos padronizado em aproximadamente 62 g. O delineamento experimental utilizado foi o inteiramente casualizado, com seis tratamentos e cinco repetições, em esquema fatorial 2x3 (idade da matriz x forma física da ração pré-inicial). Na fase pré-inicial, a forma física da ração foi diferenciada em farelada, triturada e micro-peletizada, com fornecimento fixado em 200 g/ave. Do término da fase pré-inicial até os 42 dias de idade, foi fornecida uma ração comum farelada, para todos os tratamentos. Os parâmetros de desempenho avaliados nos experimentos 1 e 3 foram: ganho de peso, consumo de ração, conversão alimentar e viabilidade criatória. O tempo utilizado para o consumo total da ração pré-inicial foi monitorado. Para a avaliação da alometria de órgãos (intestinos delgado e grosso, fígado, pâncreas, proventrículo, moela e saco vitelino), foram utilizados em cada experimento (2 e 4), 240 pintos de um dia, machos e fêmeas sexados, nos mesmos tratamentos adotados nos experimentos 1 (pesos distintos) e 3 (pesos semelhantes). Foram sacrificadas seis aves provenientes de cada idade de matriz ao alojamento e quatro aves por tratamento nos dias três, cinco, sete, 14 e 21, sendo cada ave considerada uma unidade experimental. A gema de ovos provenientes de matrizes adultas foi maior mesmo quando estes apresentavam pesos semelhantes aos de matrizes jovens. Em ambos os experimentos de desempenho, melhores resultados foram obtidos pelos frangos provenientes de matrizes de 55 semanas de idade, bem como, por aqueles que consumiram rações pré-iniciais processadas. As aves levaram menos tempo para consumir 200 g de rações processadas do que farelada. Ao alojamento, moela, proventrículo, fígado e intestino delgado foram mais pesados para as aves oriundas de matrizes adultas, quando estas apresentavam pesos iniciais superiores aos das aves de matrizes jovens. O desenvolvimento do pâncreas, intestino delgado, fígado e proventrículo na primeira semana de vida foi superior ao crescimento corpóreo das aves, independente da idade da matriz. Conclui-se que o peso do ovo influencia o peso do pinto à eclosão, porém, é a idade da matriz que atua sobre o desempenho de frangos de corte. Além disso, o consumo de dietas processadas na fase pré-inicial favorece o desempenho dos frangos até os 42 dias de idade. / Four trials were conducted to evaluate the physical form of pre-starter diets on performance and allometric growth of gastrointestinal organs of chickens from eggs having the same or different weights, hatched from Ross breeders of different ages. In trails1 and 2, 2,340 eggs were incubated and in trails 3 and 4, 2,160. The eggs percentage composition was evaluated. Trials 1 and 2, as well as trials 3 and 4, were carried out simultaneously. After hatching, 1,380 day-old chicks, males and females, from young breeders (29 weeks) or adult breeders (55 weeks) were used in performance experiments: in experiment 1 the eggs weighted 57,8 g or 68,8 g, respectively, and in experiment 3, egg weight was standardized at 62 g. The performance trials were conducted in a completely randomized design with 6 treatments and 5 replicates, and the treatments consisted of a 2 3 factorial arrangement of breeder age (young and adult) and physical form of the pre-starter feed (mash, crumbled or micro-pellets). This feed was provided at a fixed amount of 200 g per chick and, after that, the birds in all treatments were fed a common starter, grower and finisher diet in mash form, to 42 days of age. Live weight, weight gain, feed intake, feed conversion and viability were evaluated on a pen basis. The time required for total consumption of the pre-starter feeds was monitored. To evaluate the allometric growth of gastrointestinal organs (small and large intestines, liver, pancreas, proventriculus, gizzard and yolk sac), in experiments 2 and 4, 240 one-day-chicks, males and females, were distributed to six pens with the same treatments as experiments 1 and 3, respectively. Six chicks from each breeder age on the first day and four chicks at ages three, five, seven, 14 and 21 days were sacrificed. The experimental unit was each chick. The yolk from adult breeder eggs was heavier, even when the eggs had similar weight of those from young breeders. In both performance trials, better results were obtained for chickens from adult breeders, as well as, for chickens fed processed pre-starter diets. The chickens consumed 200 g of processed diets faster than the mash diet. On the first day, gizzard, proventriculus, liver and small intestine were heavier in chicks from adult breeders than in chicks from young breeders, when the former presented heavier initial weight. Pancreas, small intestine, liver and proventriculus development was superior to body growth, independent of breeder age. It is concluded that egg weight influences the chick weight at hatching, however, breeder age affects the overall performance of the chickens. Furthermore, processed feeds benefit the chicks in the pre-starter phase and this benefit is maintained in the broilers to market weight.

Thesis (Ph.D. (Animal Production)) --University of Limpopo, 2018 / Pigs are of high economic importance, especially among the smallholder pig farmers as they contribute to human nutrition, food security, poverty alleviation, enhanced livelihood and creation of employment for the rural community. However, reproductive inefficiency is the main limiting factor due to inaccessibility to superior germplasm. Therefore, advances in reproductive technologies such as oestrus synchronization and artificial insemination (AI) offers unprecedented opportunities for livestock improvement for smallholder pig farmers. The first objective determined the status of pig productivity in smallholder farms of Gauteng Province prior to the introduction of advanced reproductive technologies (ARTs). The population was divided into four strata, namely West Rand, Ekurhuleni, Tshwane and Sedibeng district municipalities. A proportional stratified random sampling procedure was used to select 71 smallholder pig farmers with the assistance of extension officers from Gauteng Department of Agriculture and Rural Development (GDARD). The majority of the respondents were males (67%) and were above 50 years of age (67%), whilst 56% of the respondents had high school education. Majority of the respondents privately owned the farms (62%) and the farm infrastructure had facilities with low cost housing and modern facilities. Additionally, 47% of the respondents fed their pigs with feed swill. A large proportion of the respondents did not vaccinate their pigs (81%). Majority of respondents did not identify their pig herds (63%). Interestingly, majority of the respondents did not have breeding boars (73%) and sold their pigs at auctions (70%). The second objective determined semen characteristics evaluated by a Computer Aided Sperm Analyser® (CASA®) as a measure of boar fertility to be used for artificial insemination (AI). Sixteen ejaculates were collected from three Large White boars that are routinely used for semen collection purposes using the gloved-hand technique. The semen was extended with a commercial semen extender; Beltsville Thawing Solution, and the AI dose used consisted of 80mL semen sample (3×109 spermatozoa/mL). Aliquots of diluted semen were evaluated for spermatozoa motility using CASA®. Spermatozoa viability was evaluated using Synthetic Binding CD-14 (SYBR+)/Propidium Iodide (PI-), whereas spermatozoa morphology was evaluated using Eosin Nigrosin stain. The average semen volume, concentration and pH were 210 mL, 264.8 x 106 spermatozoa/mL and 7.1, respectively. The average values for total spermatozoa motility was 95.1%, ranging from 82.7 and 98.5%. However, XIX there were lower values found for progressive spermatozoa motility, ranging from 13.6 to 39.0%. The mean values for morphologically normal spermatozoa ranged from 47.8-60.9% and live spermatozoa ranged from 71.8-77.7%. The third objective determined sow fertility following AI at smallholder farms A total of 73 multiparous sows were artificially inseminated. Conception rates, farrowing rates, litter size and number born alive were recorded. The average conception and farrowing rates were 78.1 and 57.5%, respectively. Furthermore, AI resulted in acceptable fecundity (i.e., 11.8 litter size and 10.0 number of piglets born alive). The fourth objective determined the relationship between spermatozoa quality characteristics and sow fertility at smallholder farms in Gauteng Province. Of all fertility characteristics studied, conception rate was significantly related to total spermatozoa motility rate (r= 0.37, P<0.01), progressive motility (r= 0.31, P<0.01) and rapid motility (r= 0.40, P<0.01), although relatively low. There was a low negative relationship between spermatozoa morphological characteristics and fertility (P>0.05). The fifth objective determined the pre-weaning growth performance of piglets born following AI at smallholder farms of Gauteng province. Individual piglets were weighed using an electronic weighing scale. Litter size, number of piglets born alive, number of piglets weaned, the average piglet birth weight and average piglet weaned weight were recorded. The average litter size was 11.8 ± 0.2. The average birth weight and weaning weights were 1.9 and 6.2 kg, respectively. No significant differences were found between male and female piglets for all the growth performance characteristics. Piglets born during winter had a significantly higher (P<0.05) birth and weaning weight as compared to autumn and summer months. Season had a significant effect on birth and weaning weight (P<0.01). However, sex of piglets had no effect on all the characteristics recorded (P>0.05). The interaction between sex and season was only observed on the total number of weaned piglets (P<0.01). A highly significant positive correlation was found between litter size and number of piglets born alive (r= 0.86) and total number of piglets weaned (r= 0.50). A highly significant correlation was found between total number of piglets born alive and total number of piglets weaned (r= 0.55). In conclusion, the study demonstrated the potential benefit of adopting AI technology under smallholder production systems to disseminate superior genetic material to smallholder pig farmers in Gauteng Province. The total spermatozoa motility, progressive and rapid spermatozoa motility were the only spermatozoa motility characteristics significantly correlated XX with conception rate. Conversely, litter size and number born alive were not correlated with CASA® spermatozoa motility attributes. No relationships existed between spermatozoa morphological characteristics and fertility. The sex ratio percentage of piglets born following AI was 52:48% (females: males). The number of piglets born alive was 10.2 and 9.5 for number piglets weaned. Season influenced birth to weaning weight. However, sex had no significant influence at birth and weaning weight. Litter size affects the number of piglets born alive and weaned. The study showed that the introduction of advanced reproductive technologies improved productivity of pigs at smallholder pig farms in Gauteng Province. / Gauteng Department of Agriculture and Rural Development (GDARD) and Southern African Science Service Centre for Climate Change and Adaptive Land Management (SASSCAL

Esta Tese tem como tema os agricultores familiares diferenciados que vem sendo denominados de pecuaristas familiares. Estes agricultores têm como atividade principal a bovinocultura de corte explorada em pequenas áreas. O objetivo deste trabalho é investigar a existência, as lógicas e as estratégias dos pecuaristas familiares da região da Campanha do Rio Grande do Sul. As hipóteses que norteiam este trabalho são a de que os pecuaristas familiares são realmente um tipo diferenciado dentro da agricultura familiar, que são frutos de diferentes formações oriundas da ocupação da terra, que têm contribuições importantes em relação à questão ambiental e ao processo de desenvolvimento. Através de 60 entrevistas realizadas com pecuaristas familiares em três municípios da região da Campanha (Bagé, Dom Pedrito e Quaraí) foi possível compreender melhor as suas origens e as suas estratégias. Além disso, foram realizadas quatro entrevistas com assentados da reforma agrária, estabelecidos em dois municípios da região (Hulha Negra e Candiota), que acabaram optando pela bovinocultura de corte repetindo as formas estabelecidas historicamente. O trabalho utiliza o modo de vida e os estilos de agricultura como a explicação teórica mais consistente para a realidade encontrada. Os dados obtidos demonstram que os pecuaristas familiares são sim um tipo de agricultor familiar que norteiam as suas atividades e as suas estratégias a partir do modo de vida que definem para si e suas famílias. As principais características do modo de vida dos pecuaristas familiares são cinco. A primeira é a bovinocultura de corte como a principal atividade agrícola, praticada sobre pastagens naturais e com baixo uso de insumos externos sendo os bovinos considerados como mercadoria de reserva. Isto acarreta estratégias como as altas lotações de animais por hectare, a diversificação "por dentro" da atividade (cria e recria) e vendas de animais apenas quando há necessidades financeiras. A segunda é a autonomia em relação ao mercado estabelecendo estratégias de comercialização a partir das necessidades da família e não na busca de melhores preços, além de distância dos endividamentos. terceira é o uso principal da mão-de-obra da família associada com uma troca de serviços com os vizinhos em uma relação de reciprocidade que permite enfrentar os momentos de maior demanda por mão-de-obra. A quarta é a grande quantidade e a grande importância que tem a aposentadoria rural para os pecuaristas familiares. A quinta é a presença do autoconsumo de maneira significativa representada não pelo consumo de vegetais, mas pelo consumo de carne bovina e, principalmente ovina. Apesar de ser um grupo de famílias que tem pouca renda pode-se constatar que se trata de um modo de vida que contribui econômica, social e ambientalmente com os processos de desenvolvimento rural compreendido de maneira mais ampla do que apenas o crescimento da economia. / The subject of the herein enclosed thesis is that particular variety of family farmers that is currently being referred to as "family cattle breeders". These farmers' main activity is the raising of beef cattle bred within small, restricted areas. The aim targeted by the present work was that of probing the existence, economical logic, and strategies employed by family cattle breeders in the Campanha (Southernmost Plains) area of Brazilian state, Rio Grande do Sul. The hypotheses presented as guidelines to this work are (a) that family cattle breeders are an actual variety within the family agricultural work universe; (b) that they result from different mindsets achieved during the several waves of land occupation; and (c), that they indeed bring important contributions into the environment and the developmental process. Sixty interviews were conduced with family farm owners in three different Campanha area counties (Bagé, Dom Pedrito, and Quaraí) which led to a better understanding of their origins and the strategies adopted by them. To these were added four interviews achieved with recipiendaries of land grants afforded them by the Agrarian Reformation processes and who had been settled in two other Campanha area counties (Hulha Negra and Candiota) all of whom opted out for beef cattle breeding, repeating therefore the historically stablished ways of cattle-raising in said area. This paper takes their chosen ways of life and their adopted agricultural styles as the most consistent theoretical explanation for the reality that was found. Data gleaned shows that family cattle breeders are indeed a particular kind of family farmers and that they orient their activities and strategies from the way of life they defined for themselves and their families. The main characteristics which were pinpointed among the family cattle breeding farmers are five, as described below. The first is that beef cattle raising is their main farming activity and that it is performed on natural grasslands and with low usage of external inputs, as their beef cattle is considered to be prime goods. This prods them into the adoption of some necessary strategies, like high percentiles of animals per hectare, the "inside" diversification of the activity (breeding and re-breeding), as well as the selling of animals only when in need of hard cash. The second is their being autonomous in relation to the market prices, setting up marketing strategies according to the family needs and not in search for the best pricing, as well as keeping away from borrowing and getting into debts. The third characteristic is employing mainly the family's own work in association with labor trading with their neighbors, a technique that allows them to face the moments when the demand for labor is strongest. The fourth is the great importance and the numbers of rural retirement benefits for family beef cattle breeders. The fifth is the presence of a high degree of self-consume, which is not significatively represented by vegetal produce, but by beef cattle meat and, all the oftener, by mutton. Even though this group of families reaches only into the lowest income brackets, the analysis of data gathered allowed for the conclusion that their way of life contributes economically, socially, and environmentally toward the processes of rural development when this is understood in a broader sense than the simple economical growth.