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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Desempenho zootécnico e características físico-químicas da carne de vitelões Nelore e Limousin x Nelore criados sob sistema orgânico e submetidos a diferentes suplementações em cocho privativo / Performance and Physical Chemical Composition of "Vitelão" Nellore and Limousin x Nellore Meat Raised under Organic Conditions and Fed with Differents Creep Feeding

Alves, Fabiana Villa 28 August 2007 (has links)
O objetivo deste trabalho foi avaliar o efeito da dieta, grupamento genético e sexo na produção de vitelões mantidos em pastagens de Brachiaria sp. e criados em Sistema Orgânico, analisando desempenho e características físico-químicas da carne. Cinqüenta e um bezerros Nelore e Limousin x Nelore foram suplementados em cocho privativo até a desmama. Os tratamentos foram: MSC, suplemento à base de milho+farelo de soja+ complexo mineral para lactentes; MSAC, suplemento à base de milho+farelo de soja+farelo de amendoim+ complexo mineral para lactentes; CMF, complexo mineral para lactentes. Após a desmama (aos 260 dias), os animais foram recriados à pasto, recebendo dois tratamentos (1 kg/animal/dia): MAP, ração à base de milho+farelo de soja e sal mineral à vontade; MASP, ração à base de milho+farelo de soja+farelo de amendoim e sal mineral à vontade. Foram mensurados o peso ao nascer (PN), peso de entrada no creep (PEC), peso de saída do creep (PSC), peso a desmama ajustado (PD), peso à fazenda (PFZ). Também foram determinados o ganho de peso do nascimento ao desmame (GNDA) e ganho de peso médio diário (GPMD). Os animais foram abatidos com idade média de 401 dias e PV médio de 227,75 kg. Após o abate, foram determinados o pH inicial (pH1) e peso da carcaça quente (PCQ). Após o resfriamento, determinaram-se o pH final (pH24), peso da carcaça fria (PCF), rendimento da carcaça fria (RC) e perdas por resfriamento (PR e PPR). Mensurou-se a área de olho de lombo (AOL) e espessura de gordura subcutânea (EGS) no Longissimus dorsi. Em amostras maturadas por 7 dias, foram avaliadas a cor (L*a*b*), perda de água por descongelamento (PAD), perda de água por cocção (PAC), perdas totais (PT) e força de cisalhamento (FC). Também se determinou o perfil dos ácidos graxos, colesterol e composição centesimal (CS) da carne. Houve interação entre sexo e grupo genético para PN (P<0,01); dieta e sexo para PCQ (P<0,05) e FC (P<0,01) e dieta, sexo e grupo genético para FC (P<0,05). Não foram observardas diferenças entre MSC, MSAC e CFM para nenhum dos caracteres até o abate. A EGS foi influenciada pela ração (P<0,01). O sexo influenciou PD (P<0,05), GPMD (P<0,01), GPDA (P<0,05), EGS (P<0,05) e CS (P<0,05), com exceção de matéria mineral. O grupamento genético, por sua vez, influenciou PEC (P<0,01), PD (P<0,01), GPM (P<0,01), GPDA (P<0,01), PSC (P<0,01), PFZ (P<0,01), PCQ (P<0,01), PCF (P<0,01), RC (P<0,05), PR (P<0,05), pH24 (P<0,01), AOL (P<0,01) e CS (P<0,05), com exceção de extrato etéreo e matéria mineral. Os resultados demonstraram que todas as suplementações podem ser utilizadas na produção de vitelões orgânicos sem detrimento ao desempenho e características físico-químicas da carne. Por outro lado, o grupamento genético, bem como o sexo do animal, podem influenciar características importantes dentro do Sistema de Produção. Em se tratando de produto orgânico, estudos adicionais devem ser realizados na tentativa de conciliar as exigências mercadológicas necessárias para comercialização e as normas exigidas para a sua produção. / The objective of this study was to evaluated the effect of creep fed, gender and breed on the performance and physical chemical composition of &#34;vitelão&#34; meat raised under organic condition on pastures of Brachiaria sp. Fifty one Nellore and Limousin x Nellore calves were fed until wean with different creep feeding: ground corn+soybean meal+special mineral complex for suckling calves (C1); ground corn+soybean meal+peanut meal+special mineral complex for suckling calves (C2); special mineral complex for suckling calves (C3). After weaning (260 days), the calves were maintained on pasture and distributed in two treatments: ground corn+soybean meal+ mineral salt (R1); ground corn+soybean meal+peanut meal+mineral salt. There were determinate the born weight (BW), initial creep weight (ICE), end creep weight (ECE), average daily gain (ADG), weaning weight (WW) and farm weight (FW). The animals were slaughtered at 401 days old and 227,75 LW. After slaughter, there were determinate the pH (pH1) and hot carcass weight (HCW). After cooling, there were determinate the parameters: cold carcass weight (CCW), carcass dressing (CD), ultimate pH (pH24) and refrigerated losses (RL). At 12th and 13th ribs on Longissimus dorsi were obtained rib eye area (REA), thickness of subcutaneous fat (TSF), shear force (SF), drip loss (DL), cooking loss (CL), instrumental colour (IC), fatty acid profile, cholesterol and chemical composition (CC). The results showed that there were not significant differences (P>0.05) between the diets for the parameters, except for TSF (P<0.01). The gender influenced the BW (P<0.05), ADG (P<0.01), TSF (P<0.05) and CC (P<0.05). The breed influenced the ICE (P<0.01), WW (P<0.01), ADG (P<0.01), ECE (P<0.01), FW (P<0.01), HCW (P<0.01), CCW (P<0.01), CD (P<0.05), RL (P<0.05), pH24 (P<0.01), REA (P<0.01), CC (P<0.05). The results showed that all diets can be use in &#34;vitelão&#34; system production without detriment of their performance or physical chemical characteristics. In despite of this, the gender and breed can influence important characteristics of the Production System. In organic foods, more study need to be done to conciliate the market requirements and the norms for Organic production.
2

Podnikatelský záměr založení ekofarmy v České republice / Business plan of organic farm in Czech Republic

Soshnikova, Ksenia January 2012 (has links)
The aim of this diploma thesis is to prepare a business plan of an organic farm in Czech Republic. Family business produces high quality agriculture products, as lamb meat, organic milk and other organic milk products. In addition a family company will operate accommodation and restaurant in the four star boarding house. Theoretical part is focused on the term entrepreneurship and justification of necessity for making business plan. Other chapters are devoted to sustainable development, eco-agro tourism and its interconnection to organic agriculture. The chapter about organic agriculture presents its principles and briefly deals with the history and legislation. Practical part includes business plan, which is based on the results of situation analysis. Business proposal of the organic farm is divided into general description of family business, marketing part and financial part.
3

Desempenho zootécnico e características físico-químicas da carne de vitelões Nelore e Limousin x Nelore criados sob sistema orgânico e submetidos a diferentes suplementações em cocho privativo / Performance and Physical Chemical Composition of &#34;Vitelão&#34; Nellore and Limousin x Nellore Meat Raised under Organic Conditions and Fed with Differents Creep Feeding

Fabiana Villa Alves 28 August 2007 (has links)
O objetivo deste trabalho foi avaliar o efeito da dieta, grupamento genético e sexo na produção de vitelões mantidos em pastagens de Brachiaria sp. e criados em Sistema Orgânico, analisando desempenho e características físico-químicas da carne. Cinqüenta e um bezerros Nelore e Limousin x Nelore foram suplementados em cocho privativo até a desmama. Os tratamentos foram: MSC, suplemento à base de milho+farelo de soja+ complexo mineral para lactentes; MSAC, suplemento à base de milho+farelo de soja+farelo de amendoim+ complexo mineral para lactentes; CMF, complexo mineral para lactentes. Após a desmama (aos 260 dias), os animais foram recriados à pasto, recebendo dois tratamentos (1 kg/animal/dia): MAP, ração à base de milho+farelo de soja e sal mineral à vontade; MASP, ração à base de milho+farelo de soja+farelo de amendoim e sal mineral à vontade. Foram mensurados o peso ao nascer (PN), peso de entrada no creep (PEC), peso de saída do creep (PSC), peso a desmama ajustado (PD), peso à fazenda (PFZ). Também foram determinados o ganho de peso do nascimento ao desmame (GNDA) e ganho de peso médio diário (GPMD). Os animais foram abatidos com idade média de 401 dias e PV médio de 227,75 kg. Após o abate, foram determinados o pH inicial (pH1) e peso da carcaça quente (PCQ). Após o resfriamento, determinaram-se o pH final (pH24), peso da carcaça fria (PCF), rendimento da carcaça fria (RC) e perdas por resfriamento (PR e PPR). Mensurou-se a área de olho de lombo (AOL) e espessura de gordura subcutânea (EGS) no Longissimus dorsi. Em amostras maturadas por 7 dias, foram avaliadas a cor (L*a*b*), perda de água por descongelamento (PAD), perda de água por cocção (PAC), perdas totais (PT) e força de cisalhamento (FC). Também se determinou o perfil dos ácidos graxos, colesterol e composição centesimal (CS) da carne. Houve interação entre sexo e grupo genético para PN (P<0,01); dieta e sexo para PCQ (P<0,05) e FC (P<0,01) e dieta, sexo e grupo genético para FC (P<0,05). Não foram observardas diferenças entre MSC, MSAC e CFM para nenhum dos caracteres até o abate. A EGS foi influenciada pela ração (P<0,01). O sexo influenciou PD (P<0,05), GPMD (P<0,01), GPDA (P<0,05), EGS (P<0,05) e CS (P<0,05), com exceção de matéria mineral. O grupamento genético, por sua vez, influenciou PEC (P<0,01), PD (P<0,01), GPM (P<0,01), GPDA (P<0,01), PSC (P<0,01), PFZ (P<0,01), PCQ (P<0,01), PCF (P<0,01), RC (P<0,05), PR (P<0,05), pH24 (P<0,01), AOL (P<0,01) e CS (P<0,05), com exceção de extrato etéreo e matéria mineral. Os resultados demonstraram que todas as suplementações podem ser utilizadas na produção de vitelões orgânicos sem detrimento ao desempenho e características físico-químicas da carne. Por outro lado, o grupamento genético, bem como o sexo do animal, podem influenciar características importantes dentro do Sistema de Produção. Em se tratando de produto orgânico, estudos adicionais devem ser realizados na tentativa de conciliar as exigências mercadológicas necessárias para comercialização e as normas exigidas para a sua produção. / The objective of this study was to evaluated the effect of creep fed, gender and breed on the performance and physical chemical composition of &#34;vitelão&#34; meat raised under organic condition on pastures of Brachiaria sp. Fifty one Nellore and Limousin x Nellore calves were fed until wean with different creep feeding: ground corn+soybean meal+special mineral complex for suckling calves (C1); ground corn+soybean meal+peanut meal+special mineral complex for suckling calves (C2); special mineral complex for suckling calves (C3). After weaning (260 days), the calves were maintained on pasture and distributed in two treatments: ground corn+soybean meal+ mineral salt (R1); ground corn+soybean meal+peanut meal+mineral salt. There were determinate the born weight (BW), initial creep weight (ICE), end creep weight (ECE), average daily gain (ADG), weaning weight (WW) and farm weight (FW). The animals were slaughtered at 401 days old and 227,75 LW. After slaughter, there were determinate the pH (pH1) and hot carcass weight (HCW). After cooling, there were determinate the parameters: cold carcass weight (CCW), carcass dressing (CD), ultimate pH (pH24) and refrigerated losses (RL). At 12th and 13th ribs on Longissimus dorsi were obtained rib eye area (REA), thickness of subcutaneous fat (TSF), shear force (SF), drip loss (DL), cooking loss (CL), instrumental colour (IC), fatty acid profile, cholesterol and chemical composition (CC). The results showed that there were not significant differences (P>0.05) between the diets for the parameters, except for TSF (P<0.01). The gender influenced the BW (P<0.05), ADG (P<0.01), TSF (P<0.05) and CC (P<0.05). The breed influenced the ICE (P<0.01), WW (P<0.01), ADG (P<0.01), ECE (P<0.01), FW (P<0.01), HCW (P<0.01), CCW (P<0.01), CD (P<0.05), RL (P<0.05), pH24 (P<0.01), REA (P<0.01), CC (P<0.05). The results showed that all diets can be use in &#34;vitelão&#34; system production without detriment of their performance or physical chemical characteristics. In despite of this, the gender and breed can influence important characteristics of the Production System. In organic foods, more study need to be done to conciliate the market requirements and the norms for Organic production.
4

The Value of Data Regarding Traceable Attributes in a New Era of Agriculture : Bridging the Information Gap Between Consumers and Producers of Organic Meat

Kransell, Martin January 2014 (has links)
Purpose – This study aims to explore, and suggest solutions to, the gap between the supply of information from organic meat producers and the demand of information from consumers regarding traceable characteristics (attributes) of meat in a limited geographical area in order to maximize the utilization and value of collected data. Design/methodology/approach – A mixed methods research design is applied to collect both quantitative data from consumers and qualitative data from suppliers to produce empirical results of the supply and demand of information. A theoretical framework of organic food purchase intent is used for the quantitative study as well as the correlation between consumers’ perceived importance of attributes and their willingness-to-pay for meat. The results of the empirical studies are compared to each other in an effort to expose a possible gap using a gap analysis. Findings – Meat is shifting from a price based commodity to a product based on characteristics. This study reveals that there is now a gap between the information made available by organic meat producers and the demand of information from consumers that needs to be recognized in order to maximize the value of collected data. Information regarding environmental impact of raising and transporting the animals is not extensively collected. A substantial amount of data about attributes of perceived importance, such as safety and handling, animal welfare and medication or other treatments is collected but not extensively shared with consumers. Research limitations/implications – The small sample size in a unique area and the scope of the survey data does not provide a result that can be truly generalized. It is therefore suggested that future studies produce results from a larger sample that incorporates the perceived accessibility of important information for consumers. Practical implications – This contributes to the emerging literature of organic food production by comparing both the supply and the demand of information regarding attributes of meat. This information is valuable to organic meat producers and marketers as well as developers of agricultural systems and databases that should shift their focus to consumer oriented traceability systems. Originality/value – This study goes beyond the substantial body of literature regarding attributes of organic food and consumers preferences by comparing these factors to the available supply of information by meat producers and by suggesting solutions to bridge the gap between them. Keywords – Organic meat, Organic agriculture, e-Agriculture, Traceability, Traceability systems, Consumer oriented, Consumer behavior, Willingness-to-pay, Supply and demand, Information gap, Gap analysis, Business development, United States of America, Sense-making theory, Mixed methods Paper type – Research paper, Bachelor’s thesis

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