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Desempenho produtivo e econ?mico de tr?s grupos gen?ticos de bovinos recriados a pasto com suplementa??o e terminados em confinamento / Productive and economical performance of three genetic groups of animals raised on pasture with supplementation and feedlotMoreira, Felipe Sousa 23 May 2013 (has links)
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Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Avaliou-se o desempenho produtivo e econ?mico de diferentes grupos gen?ticos de bovinos em sistema de produ??o com recria a pasto e termina??o em confinamento, com ciclo de um ano, na regi?o de Curvelo - MG. O experimento foi dividido em dois per?odos, que corresponderam a recria e o confinamento (termina??o), respectivamente. Foram utilizados 36 bovinos, n?o castrados, com m?dia de 270 ?50 dias de idade e peso m?dio inicial de 241,3 ?34 kg, sendo 12 Guzolando (? Guzer? x? Holand?s), 12 Guzonel (? Guzer? x ? Nelore) e 12 Tricross (? Simental x ? Guzonel). O delineamento estat?stico foi inteiramente casualizado (DIC), de forma que cada grupo foi considerado com um tratamento, e os animais, as repeti??es (3 x 12). Os animais permaneceram no mesmo lote, em pastejo rotacionado de Brachiaria brizantha cv. Marandu, com suplementa??o comercial; na termina??o, receberam dieta composta por silagem de sorgo e concentrado (50:50) durante 61 dias, ap?s adapta??o de 22 dias. Os ?ndices de desempenho foram ganho m?dio de peso di?rio (GMD), ganho m?dio de peso no per?odo (GMP), peso corporal final (PCF) nas duas fases al?m de ganho de peso de carca?a (GPC) na fase de termina??o. Os indicadores de desempenho econ?mico foram a receita total (RT), custo operacional total por arroba (COT/@), custo total por arroba (CT/@), margem l?quida e lucratividade. Os custos foram obtidos atrav?s da metodologia de custo operacional. O GMD, na recria, foi semelhante (P>0,05) aos grupamentos que apresentaram m?dia de 746 e 456 gramas, respectivamente, para os per?odos transi??o ?guas/secas. O COT/@ da recria do grupamento Tricross (R$ 69,44) foi superior aos dos grupamentos Guzonel (R$ 66,75) e Guzolando (R$ 64,86). No per?odo de termina??o, o GMD do grupamento Guzolando (1,65 kg/dia) foi superior estatisticamente (P<0,05) ao do Guzonel (1,39 kg/dia), por?m sem diferen?a estat?stica (P>0,05) ao do Tricross (1,26 kg/dia). O GPC foi maior (P<0,05) para o grupamento Tricross (79,79 kg), por?m n?o diferiu estatisticamente (P>0,05) entre os grupamentos Guzonel (62,62 kg) e Guzolando (59,41 kg). O COT/@ da termina??o em confinamento foram R$ 91,48, R$114,15 e R$122,78, respectivamente, para os grupamentos Tricross, Guzonel e Guzolando. Considerando-se a an?lise do sistema de ciclo curto com a inclus?o dos dois per?odos experimentais, obteve-se um COT/@ menor para o grupamento Tricross (R$77,92) seguido pelo grupamento Guzonel (R$ 74,89) e Guzolando (R$ 78,43). Esses resultados propiciaram maior lucratividade para os cruzamentos Tricross (21,99%) comparados aos demais cruzamentos (18,92% e 18,31%, respectivamente, para Guzonel e Guzolando), o que indica a op??o deste tipo de cruzamento na regi?o estudada. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT
The productive and economic performance of different genetic groups of cattle production system under grazing and feedlot finishing with one year cycle in Curvelo - MG region?s was evaluated. The experiment was divided into two periods, corresponding to recreate and confinement (termination), respectively. We used 36 cattle bulls, averaging 270 days of age (? 30) and average weight of 241.3 kg (? 34), divided into three groups: Guzolando (X ? ? Guzer? Dutch), Guzonel (? Guzer? X Nelore) and Tricross (X ? Simmental ? Guzonel). The experimental design was completely randomized (CRD) and each group was considered a treatment and animals repetitions (3 x 12). These remained in the same batch, in rotational grazing Brachiaria brizantha. Palisade, supplementation with commercial and termination received diet containing sorghum silage and concentrate (50:50) for 61 days, after 22 days of adaptation. The performance indices were average daily weight gain (ADG), average daily gain during the period (GMP), final body weight (PCF) in the two phases as well as gain carcass weight (GPC) in the finishing phase. The economic performance indicators were total revenue (TR), total operating expenses per bushel (COT / @), total cost per bushel (CT / @), net margin and profitability. Costs were obtained through the methodology of operational cost. The ADG during the growing phase was similar (P> 0.05) between the groups with a mean of 746 and 456 grams, respectively, for the period?s transitional waters / dry. The COT / @ recreates the grouping of Tricross (R$ 69.44) was higher than that of groups Guzonel (R$ 66.75) and Guzolando (R$ 64.86). In the finishing period, ADG of grouping Guzolando (1.65 kg / day) was statistically higher (P <0.05) to the Guzonel (1.39 kg / day), but no statistical difference (P> 0.05) of the Tricross (1, 26 kg / day). The GPC was higher (P <0.05) to the grouping Tricross (79.79 kg), though not significantly different (P> 0.05) between the groups Guzonel (62.62 kg) and Guzolando (59.41 kg.) The COT / @ the feedlot finishing were R $ 91.48, R $ 114.15 and R $ 122.78 respectively for the groups Tricross, and Guzonel Guzolando. Considering the analysis of the short-cycle system with the inclusion of the two experimental periods, we obtained a COT / @ lowest for grouping Tricross (R$ 77.92) followed by grouping Guzonel (R$ 74.89) and Guzolando (R$ 78, 43). These results provided higher profitability for the crosses Tricross (21.99%) compared to other intersections (18.92% and 18.31% respectively, and for Guzonel Guzolando) which indicates the choice of this type of intersection in the study area.
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Respostas fisiol?gicas, fenol?gicas e anat?micas de Syngonanthus elegans (Bong.) Ruhland e Syngonanthus elegantulus Ruhland cultivadas sob dois n?veis de radia??o em Diamantina, MG.Nunes, Silvia Cristina Paslauski 21 July 2008 (has links)
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Previous issue date: 2008 / Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)) / Syngonanthus elegantulus Ruhland (vargeira) e Syngonanthus elegans (Bong.) Ruhland (p?-de-ouro) s?o as sempre-vivas mais exploradas comercialmente na regi?o de Diamantina. O extrativismo dessas constitui importante fonte de renda para muitas fam?lias do Vale do Jequitinhonha. As ?reas de ocorr?ncia dessas esp?cies v?m diminuindo drasticamente devido ? excessiva press?o de coleta e o manejo com o fogo, que ? ateado ap?s as primeiras chuvas (set/out), sendo utilizado com freq??ncia visando o incremento na produ??o de infloresc?ncias. Segundo os coletores no ano em que n?o se coloca o fogo, a produ??o de cap?tulos na safra subseq?ente ? reduzida. A interfer?ncia da cobertura vegetal na penetra??o da luz ? um aspecto importante no manejo das esp?cies. No manejo das sempre-vivas, o fogo pode atuar eliminando o sombreamento causado por outras esp?cies que ocorrem associadas a elas e, portanto, alterar a penetra??o de luz, interferindo na germina??o das sementes, desenvolvimento vegetativo e na produ??o de infloresc?ncias. Informa??es sobre as respostas das plantas a condi??es distintas de luz s?o de grande import?ncia para determinar seu potencial de produ??o e entender a sua capacidade competitiva sob diferentes condi??es de manejo. Objetivou-se estudar o comportamento fisiol?gico e anat?mico de S. elegans e S. elegantulus cultivadas em vasos, sob dois n?veis de radia??o (pleno sol e sombrite 50%). / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2008. / ABSTRACT Syngonanthus elegantulus Ruhland (vargeira) and Syngonanthus elegans (Bong.) Ruhl (p?- de-ouro) are everlasting flowers more commercially exploited in the region of Diamantina. The extractive such an important source of income for many families do Vale do Jequitinhonha. The areas of occurrence of these species are decreasing drastically due to excessive pressure of collection and management with fire, which is placed after the first rains (sept. / oct.) And is used frequently aimed at increasing the production of flowers. According to collectors in the year when the fire does not arise, the production of subsequent chapters in the harvest is reduced. The interference of vegetation cover in the penetration of light is an important aspect in the management of the species. In handling the ever-living, the fire can act eliminating the shading caused by other species that occur associated with them and thus change the penetration of light, interfering with the germination, vegetative growth and production of flowers. Information on the responses plant in different conditions of light is of great importance to determine their potential for production and understand its competitive capacity under different conditions of management. The objective was to study the behavior of physiological and anatomical S. elegans and S. elegantulus grown in pots, under two levels of radiation (full sun and sombrite 50%).
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Caracteriza??o fenol?gica e produtiva de cultivares de amoreira-preta / Phenological and productive characterization of blackberry cultivarsFagundes, Miri? Cristina Pereira 11 March 2014 (has links)
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Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / A temperatura ? considerada o elemento clim?tico mais importante para a produ??o da amoreira-preta (Rubus sp.). Em Diamantina, no Alto Vale do Jequitinhonha, em fun??o de sua altitude, ocorrem baixas temperaturas durante o inverno, o que pode viabilizar o cultivo da amoreira-preta com boas expectativas econ?micas. Entretanto, o estudo fenol?gico ? fundamental para a identifica??o de cultivares adaptadas ?s novas regi?es de cultivo. Diante disso, a pesquisa foi realizada com o objetivo de avaliar o comportamento fenol?gico e produtivo de cultivares de amoreira-preta em Diamantina, MG. As mudas foram plantadas no Setor de Fruticultura do Campus Juscelino Kubitschek, UFVJM, localizado a 1.384 m de altitude. O clima da regi?o ? do tipo Cwb, temperado ?mido, com inverno seco e o per?odo chuvoso compreendido de outubro a mar?o, com precipita??o anual de 1.404 mm e temperatura m?dia do m?s mais quente inferior a 20,1 ?C. O tipo de solo da ?rea de cultivo ? o Neossolo Quartzar?nico ?rtico T?pico. O trabalho foi conduzido em blocos ao acaso, com quatro cultivares de amoreira-preta, ?Brazos?, ?Guarani?, ?Tupy? e ?Xavante?, cinco blocos e cinco plantas por unidade experimental. A caracteriza??o fenol?gica foi realizada nas cultivares de amoreira-preta por meio de observa??es visuais para determinar o in?cio da flora??o, da forma??o e do amadurecimento das frutas, dura??o do per?odo de florescimento e colheita. Para a caracteriza??o da exig?ncia t?rmica, foi calculado o n?mero de horas de frio acumuladas inferiores a 13 ?C, 10 ?C e 7,2?C, antes da fase de emiss?o de gemas e durante cada est?dio, a partir dos dados hor?rios de temperatura coletados pela esta??o autom?tica instalada no Campus Juscelino Kubitschek, em Diamantina, MG. Os graus-dia acumulados, nas diversas fases fenol?gicas, foram determinados a partir da diferen?a entre a temperatura m?dia di?ria e a temperatura basal inferior, que foi considerada como 10 ?C. A qualidade e a produ??o das amoras foram avaliadas a partir das caracter?sticas f?sico-qu?micas, da composi??o centesimal, da atividade antioxidante, da massa das frutas colhidas por planta e da produtividade por hectare. As cultivares de amoreira-preta apresentaram boa adapta??o ?s condi??es clim?ticas de Diamantina, MG. A ocorr?ncia de frio com temperaturas acima de 7,2 ?C foi suficiente para a produ??o das cultivares de amoreira-preta Brazos, Guarani, Tupy e Xavante no Alto Vale do Jequitinhonha. A cultivar Brazos apresentou comportamento precoce, com a antecipa??o da fase produtiva. O ciclo produtivo das cultivares de amoreira-preta, nas condi??es de clim?ticas de Diamantina, foi prolongado. Essas condi??es clim?ticas proporcionaram produ??o satisfat?ria para a cultivar Brazos, no seu segundo ciclo produtivo. A qualidade das amoras produzidas em Diamantina foi mantida, com varia??es condizentes com as altera??es clim?ticas da regi?o. A qualidade das amoras ? melhor quando colhidas na ?poca seca, com baixa incid?ncia de chuvas e alta radia??o solar. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT Temperature is considered the climatic element most important for the production of blackberry (Rubus sp.). Diamantina, in the Alto Vale do Jequitinhonha, due to its altitude, shows the occurrence of low temperatures during winter, which may enable the cultivation of the blackberry with good economic expectations. However, the phenological study is essential for the identification of cultivars adapted to new growing regions. Therefore, the research was carried out to evaluate the phenological and productive behavior of blackberry cultivars in Diamantina, Minas Gerais. The nursery blackberry were planted in the Fruitculture Sector of Campus Juscelino Kubitschek, UFVJM, located at 1,384 m altitude. The climate is the type Cwb, temperate humid with dry winter and rainy season from October to March, with annual precipitation of 1,404 mm and mean temperature of warmest month lower to 20,1?C. The soil type of the crop area is Quartzarenic Neosol. The study was conducted in a randomized block design with four blackberry cultivars Brazos, Guarani, Tupy and Xavante, with five blocks and five plants per experimental unit. The phenological characterization was carried in blackberry cultivars through visual observations to determine the beginning of flowering, formation and ripening fruits, length of the period flowering and harvest. To characterize the thermal demand was calculated the number of chilling hours accumulated less than 13 ?C, 10 ?C and 7,2 ?C before the stage of issuance of gems and during each stage from hours temperature data collected by automatic station installed in Campus Juscelino Kubitschek, Diamantina, MG. The degree-days in the different phenological phases were determined from the difference between the daily average temperature and lower basal temperature, which was taken as 10 ?C. The quality and production of blackberries were evaluated from the physico-chemical characteristics, centesimal composition, antioxidant activity, the fruit mass harvested per plant and the productivity per hectare. The cultivars of blackberry showed good adaptation to climatic conditions Diamantina, MG. The cold occurrence with temperatures above 7.2 ?C was enough to production of blackberry cultivars Brazos, Guarani, Tupy e Xavante in Alto Vale do Jequitinhonha. The cultivar Brazos showed precocious behavior, with the anticipation of the production phase. The productive cycle of blackberry cultivars in the conditions of climate Diamantina was prolonged. These climatic conditions provided satisfactory production to cultivate Brazos in its second productive cycle. The blackberry quality produced in Diamantina were maintained, with variations consistent to climate change in the region. The blackberry quality is best when harvested in the dry season with low rainfall and high solar radiation.
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O sistema alimentar no munic?pio de Couto de Magalh?es de Minas: a inser??o da agricultura familiar no com?rcio localPaulino, ?rika J?nia 06 August 2013 (has links)
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Previous issue date: 2013 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / As feiras livres, cada qual com sua relev?ncia e magnitude peculiar, desempenham importante papel na consolida??o econ?mica e social, especialmente da agricultura familiar. O objetivo desse estudo foi descrever o sistema produtivo e a comercializa??o de alimentos, na feira livre do munic?pio de Couto de Magalh?es de Minas ? Minas Gerais. As comunidades rurais do munic?pio foram percorridas para identifica??o das propriedades com alguma produ??o de alimentos, sendo que a escolha destas foi baseada em dados fornecidos pela Secretaria Municipal de Agricultura, Pecu?ria e Meio Ambiente e pelo escrit?rio regional da Empresa de Assist?ncia T?cnica e Extens?o Rural/MG. Nas ?reas de produ??o identificadas, avaliaram-se as instala??es domiciliares e as formas de produ??o de alimentos, assim como foram apontados os alimentos produzidos. Durante 27 semanas, foram realizadas visitas ? feira para identifica??o dos produtos levados ? mesma pelos feirantes. Foram aplicados question?rios aos feirantes, para obter-se informa??es acerca de seus produtos, bem como a 25 consumidores, para identifica??o de suas inten??es, ao visitarem a feira. Nas ?reas rurais, foram entrevistados 61 produtores rurais, com m?dia de idade de 54,46 anos, entre estes, 44,26% relataram que sempre residiram naquela mesma propriedade no munic?pio de estudo. Quanto ao destino da produ??o, 44,26% dos entrevistados relatou que esta se destina somente ao consumo da fam?lia, enquanto 19,67% vendem seus produtos diretamente na feira livre municipal. Em 86,89% dos peridomic?lios foi observada a presen?a de ?rvores frut?feras, enquanto que as hortas estavam presentes em 75,41%, sendo que a alface e a couve configuraram-se como as hortali?as mais frequentes. Apenas 19,68% dos entrevistados relataram fazer uso de adubos qu?micos, enquanto 80,32% usam somente adubos org?nicos. Na feira livre, foram identificados 23 feirantes ass?duos, com idade m?dia de 52 anos, e 69,56% do g?nero feminino. Os feirantes habitualmente comercializam produtos de produ??o pr?pria, sendo observado que alguns foram levados ? feira em todas as semanas do estudo, tais como alface, cebolinha, carnes e produtos de panifica??o caseira. Verificou-se que alguns produtos s?o comercializados por v?rios feirantes, como a laranja e a couve (16 feirantes), enquanto que outros, como os produtos c?rneos e alguns processados, s?o espec?ficos de certos feirantes. Aspectos higi?nico-sanit?rios dos feirantes tamb?m foram avaliados e revelaram inconformidades, como as relacionadas ? higieniza??o das m?os. Em rela??o aos consumidores, 56,00% visitam a feira na inten??o de fazer compras e 44,00% passear ou encontrar os amigos. Conclui-se que os agricultores familiares do munic?pio seguem um sistema de produ??o tradicional, pautado pela oferta local de recursos e relacionado ao seu ambiente, sendo a feira livre um importante meio de comercializa??o dos produtos do munic?pio, al?m de funcionar como lazer, contribuindo com a socializa??o dos moradores de Couto de Magalh?es de Minas. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Sa?de, Sociedade e Ambiente, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT
The street markets, each one with its peculiarity and magnitude, play an important role in consolidating economic and social, especially family farming. This research aimed to describe the production system and food marketing in the street market at Couto de Magalh?es de Minas, Minas Gerais. Based on informations of the Secretaria Municipal de Agricultura, Pecu?ria e Meio Ambiente and the regional office of Empresa de Assist?ncia T?cnica e Extens?o Rural, some rural communities were visited to identify properties with some food production. In the production areas selected, it was evaluated the installations domiciliary, the food production systems and was identified which types of foods produced. During 27 weeks, visits were made to the fair to identify and characterize the products sold by the stallholders. A questionnaire was applied to 25 consumers, in order to obtain information about their reasons for attending the fair. In the rural area, 61 farmers (mean age of 54.46 years) were interviewed and 44.26% reported that ever lived in the same properties. With respect to the food production, 44.26% responded that it is for their own consumption, while 19.67% sell their products directly at the municipal street markets. Fruit trees were identified in 86.89% of peridomestic areas, while garden is present in 75.41%, being that the lettuce and cabbage configured as the more commons vegetables. The use of fertilizers has been reported by 19.68% of producers interviewed and the 80.32% use only organic fertilizer. In the street market, 23 stallholders were assiduous, with an average age of 52 years and and the majority (69.56%) were female. The merchants usually sold territorially-based foodstuffs and it was observed that some of them were taken to the fair in all weeks of the study, such as lettuce, onions, meats and bakery products. Some kind of products were marketed by various stallholders, like orange and cabbage, however meat products and processed food were sold by specific marketers. Sanitary-hygienic aspects of stallholders were also evaluated and showed non-conformities, such as those related to hand hygiene. Regarding consumers, 56.00% visit the fair with the intention of shopping and 44.00% to stroll and meet friends. We conclude that the family farmers follow a traditional production system, guided by local resources environment-related. Furthermore, the street market is an important way of marketing of local products, besides it is a recreation area, that contributes to the socialization of Couto de Magalh?es de Minas residents.
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Ureia de libera??o lenta em dietas de vacas mesti?as em lacta??o / Slow-release urea in diets of lactating crossbred cowSantiago, Bruno Tadeu 27 May 2013 (has links)
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Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Objetivou-se, com este trabalho, avaliar o desempenho de vacas F1 (Holand?s x Zebu) em lacta??o, em fun??o de diferentes n?veis de substitui??o do farelo de soja por nitrog?nio n?o proteico equivalente prote?na, oriundo de ureia de libera??o lenta (ULL). Foram utilizadas oito vacas F1 (Holand?s x Zebu) no ter?o inicial de lacta??o, com produ??o m?dia de 12,7 kg (? 3,1 kg) de leite/dia e 552 kg (? 30 kg) de peso vivo. O delineamento experimental foi composto de dois quadrados latinos simult?neos 4x4, de acordo com os seguintes tratamentos: Controle (100% de farelo de soja e 0% de ULL), 34ULL (66% de farelo de soja e 34% de ULL), 66ULL (34% de farelo de soja e 66% de ULL) e 100ULL (0% de farelo de soja e 100% de ULL). O volumoso fornecido, juntamente ao concentrado, foi silagem de sorgo. Amostras das dietas e das sobras foram coletadas para an?lises bromatol?gicas. Foram mensurados os consumos de mat?ria seca (CMS), de prote?na bruta (CPB) e de fibra em detergente neutro (CFDN). Os consumos tamb?m foram expressos em fun??o do peso corporal (CMSPC, CPBPC e CFDNPC) e do peso metab?lico (CMSPM, CPBPM e CFDNPM). A efici?ncia alimentar (EA) e a convers?o alimentar (CA) tamb?m foram calculadas. As digestibilidades aparentes da mat?ria seca (DAMS), da prote?na bruta (DAPB) e da fibra em detergente neutro (DAFDN) foram avaliadas utilizando o ?xido cr?mico como marcador externo. A produ??o de leite foi mensurada e sua composi??o analisada. Os dados obtidos foram submetidos ? an?lise de vari?ncia, atrav?s do programa estat?stico SAEG, adotando-se o n?vel de 5% de probabilidade. Nenhuma vari?vel de consumo apresentou diferen?a significativa (P>0,05) entre tratamentos, sendo que as m?dias de CMS, CPB e CFDN foram 18,35 kg/dia, 2,62 kg/dia e 5,85 kg/dia, respectivamente. J? as m?dias de CMSPC, CMSPM, CPBPC, CPBPM, CFDNPC e CFDNPM foram 3,39 %, 163,61 g/kg de PC0,75, 0,48 %, 23,35 g/kg de PC0,75, 1,08 % e 52,19 g/kg de PC0,75, respectivamente. A efici?ncia alimentar apresentou m?dia de 0,72 kg leite/kg CMS e a convers?o alimentar m?dia foi 1,44 kg CMS/kg leite e n?o foram observadas diferen?as significativas (P>0,05) entre tratamentos para ambas vari?veis. Os resultados de digestibilidade aparente tamb?m n?o apresentaram diferen?as (P>0,05) entre tratamentos, sendo que as m?dias observadas para a DAMS, DAPB e DAFDN foram 58,16 %, 58,64 % e 36,21 %, respectivamente. A produ??o e composi??o do leite foram semelhantes (P>0,05) entre tratamentos. A m?dia de produ??o de leite corrigida para 4% de gordura foi 13,39 kg/animal/dia e as m?dias dos teores de gordura, prote?na, extrato seco total e extrato seco desengordurado foram 3,78 %, 3,23 %, 12,79 % e 9,00 %, respectivamente. As vari?veis de consumo, de digestibilidade, de produ??o e de composi??o do leite n?o s?o alteradas em fun??o da substitui??o da prote?na da soja pela ureia de libera??o lenta. Assim, para animais mesti?os de m?dia produ??o de leite, essa substitui??o depende apenas de vari?veis econ?micas. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT
The objective of this work was to evaluate the performance of F1 lactating cows (Holstein x Zebu) due to different levels of substitution of soybean meal by non-protein nitrogen equivalent protein derived from slow-release urea (SRU). Eight cows F1 (Holstein x Zebu) in the first third of lactation, with an average production of 12.7 kg (? 3.1 kg) of milk / day and 552 kg (? 30 kg) of body weight. The experimental design was composed of two 4x4 Latin square, according to the following treatments: control (100% soybean meal and 0% SRU), 34SRU (66% soybean meal and 34% SRU), 66SRU (34% soybean meal and 66% SRU) and 100SRU (0% soybean meal and 100% SRU). The forage supplied along to concentrate was sorghum silage. Samples of diets and remains were collected for chemical analysis. We measured dry matter intake (DMI), crude protein intake (CPI), neutral detergent fiber intake (NDFI). The intakes were also expressed according to the body weight (DMIBW, CPIBW and NDFIBW) and metabolic weight (DMIMW, CPIMW and NDFIMW). Feed efficiency (FE) and feed conversion (FC) were also calculated. The apparent digestibility of dry matter (ADMD), crude protein (ADCP) and neutral detergent fiber (ADNDF) were evaluated using chromic oxide as an external marker. Milk production was measured and its composition analyzed. Data were subjected to analysis of variance using the statistical program SAEG, adopting the 5% level of probability. No variable intake showed a significant difference (P>0.05) between treatments, and the averages of DMI, CPI and NDFI were 18.35 kg/day, 2.62 kg/day and 5.85 kg/day, respectively. The averages of DMIBW, DMIMW, CPIBW, CPIMW, NDFIBW and NDFIMW were 3.39 %, 163.61 g/kg BW0,75, 0.48 %; 23.35 g/kg BW0,75, 1.08 % and 52.19 g/kg BW0,75, respectively. Feed efficiency presented mean of 0.72 kg milk/kg DMI and average feed conversion was 1.44 kg DMI/kg milk and no significant differences were observed (P>0.05) between treatments for both variables. The results of apparent digestibility also do not present differences (P>0.05) between treatments, and the averages observed for ADMD, ADCP and ADNDF were 58.16 % 58.64 % and 36.21 %, respectively. The production and milk composition were similar (P>0.05) between treatments. The average milk yield corrected to 4% fat was 13.39 kg/animal/day and the average of the levels of fat, protein, total dry extract and nonfat dry extract were 3.78 % 3.23 %, 12.79 %, and 9.00 %, respectively. The variables of intake, digestibility, production and milk composition do not change due to the substitution of soy protein for slow release urea. Thus for crossbred animals average milk production, this substitution depends only on economic variables.
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Aduba??o NPK no crescimento e produ??o de pinh?o manso. / Assessment of NPK fertilization in plants production and in field cultivation of physic nut to biodiesel production.Souza, Patr?cia Teixeira de January 2010 (has links)
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Previous issue date: 2010 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / A grande demanda de ?leos vegetais no Brasil, gerada pelo Programa Brasileiro de Biodiesel, fez com que o pinh?o manso, uma esp?cie at? ent?o desvalorizada, se tornasse alternativa para fornecimento de mat?ria-prima. Por?m, muitos s?o os estudos que devem ser realizados, antes que se inicie o plantio comercial em larga escala. O manejo correto da aduba??o eleva o lucro do produtor de duas formas. Primeiro, evita o gasto de fertilizantes em quantidades erradas e, depois, favorece o melhor desempenho da planta, proporcionando maior produtividade. Este trabalho objetivou avaliar a resposta do pinh?o manso (Jatropha curcas L.) a doses de NPK no crescimento de plantas e, no crescimento de plantas, produ??o de sementes e de ?leo em duas condi??es edafoclim?ticas. Para tanto, foram montados dois experimentos: o primeiro, em condi??es de casa de vegeta??o, teve os tratamentos dispostos em delineamento inteiramente casualizado, no esquema de fatorial fracionado (4x4x4)1/2, perfazendo 32 tratamentos com tr?s repeti??es, totalizando 96 parcelas experimentais, sendo as doses de N: 0, 75, 150 e 300 mg dm-3, na forma de ur?ia; doses de P: 0, 45, 90 e 180 mg dm-3, na forma de superfosfato triplo e doses de K: 0, 50, 100 e 200 mg dm-3, na forma de cloreto de pot?ssio. Ap?s 120 dias, foram avaliadas as seguintes vari?veis: altura das plantas, di?metro do caule, massa seca da parte a?rea e de ra?zes; an?lise qu?mica do solo ap?s a colheita das plantas e teor de macro e micronutrientes na parte a?rea das plantas. O segundo foi conduzido em campo, em duas condi??es edafoclim?ticas, em Diamantina e Governador Valadares, Minas Gerais. Ambos foram conduzidos da mesma forma: o delineamento utilizado foi o delineamento em blocos casualizados no esquema de fatorial fracionado (4x4x4)1/2, perfazendo 32 tratamentos. Foram aplicadas doses de N: 0, 25, 50 e 100 kg ha-1, na forma de ur?ia; doses de P2O5: 0, 75, 150 e 300 kg ha-1, na forma de superfosfato triplo e as doses de K: 0, 50, 100 e 200 kg ha-1, na forma de cloreto de pot?ssio. Foram avaliados o crescimento das plantas pela medi??o da altura de plantas e di?metro na altura do colo do caule a cada 30 dias; produ??o de sementes e de ?leo com uma colheita em Diamantina, em 2009, e duas colheitas em Governador Valadares, em 2008 e 2009. As plantas responderam negativamente ? adi??o de N e positivamente ao P e K , mostrando que o pinh?o manso ? eficiente na absor??o de N, que foi suprido pela mat?ria org?nica do solo. J? em campo, o pinh?o manso apresentou comportamentos distintos nas duas condi??es edafoclim?ticas. Em Governador Valadares, houve resposta positiva ? aplica??o de N e, em Diamantina, resposta negativa a N e positiva a P. N?o houve resposta a K em campo, indicando que o teor do solo foi suficiente para suprir a planta em todas as fases. No experimento de vaso, as doses de P e K recomendadas foram 25 e 67 mg dm-3, respectivamente. Os n?veis cr?ticos, correspondentes ?s doses recomendadas, foram de 10,6 para P e 74,0 mg dm-3 para K no solo (Mehlich-1). Para os teores na massa seca da parte a?rea do pinh?o manso foram de 3,74; 0,18 e 3,57 dag kg-1 para N, P e K, respectivamente. As doses recomendadas de P para o crescimento, a produ??o de sementes e de ?leo de pinh?o manso em Diamantina foram de 87, 72 e 72 kg de P2O5 por ha, respectivamente. Em Governador Valadares, n?o houve recomenda??o de aduba??o nitrogenada para a fase de crescimento das plantas; para a produ??o de sementes e de ?leo, a dose recomendada foi de 36 e 31 kg ha-1 de N, respectivamente. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2010. / ABSTRACT The great demand for vegetable oils in Brazil, generated by the Brazilian Biodiesel Program, made the physic nut, a devalued specie, become an alternative for providing raw material. However, many studies must be carried out before beginning the large-scale commercial growing. The accurate fertilization increases the producer's profit in two ways, first avoids the fertilizers expense in the wrong quantities and then promotes better plant performance for higher productivity. This study evaluated the physic nut (Jatropha curcas L.) response to NPK doses on seedlings growth and plant growing, seed and oil production in two edaphic and climate conditions. Therefore, there were arranged two experiments: the first, in controlled conditions, was arranged in a completely randomized design, in the fragmented factorial scheme (4x4x4)1/2 comprising 32 treatments with three replicates totaling 96 plots and the N doses: 0, 75, 150 e 300 mg dm-3, in the urea form; P doses: 0, 45, 90 and 180 mg dm-3, in the triple superphosphate form and K doses K: 0, 50, 100 and 200 mg dm-3, in the potassium chloride form. After 120 days, there were evaluated the following variables: seedlings height, stem diameter, the shoot and roots dry mass and nutrients content in the soil and in the seedling shoot macronutrients and micronutrients. The second was conducted in field conditions on two places with distinct edaphic and climate conditions, Diamantina, MG and Governador Valadares, MG. Both were conducted in the same way, the design was in randomized blocks, in the fractional factorial scheme (4x4x4) 1 / 2. The N doses were applied: 0, 75, 150 and 300 mg dm-3, in urea form; P doses: 0, 45, 90 and 180 mg dm-3, in the form of triple superphosphate and K doses: 0, 50, 100 and 200 mg dm-3, in the potassium chloride form. There were evaluated the plants growth by the measure of plants height, stem diameter every 30 days, seeds and oil production with one harvest in Diamantina in 2009 and two harvests in Governador Valadares in 2008 and 2009. Seedlings responded negatively to N addition and positively to P, showing that physic nut is efficient in N uptake that was supplied by soil organic matter. Therefore, in the field physic nut showed different behavior in both edaphic and climate conditions. In Governador Valadares there was positive response to N application and in Diamantina there was negative response to N and positive for P. There was no response to K in either experiment, indicating that the content of the soil was sufficient to supply the plant at all stages. Seedlings responded negatively to N addition and positively to P. There was no response to K field, indicating that the content of the soil was sufficient to overcome the plant at all stages. In pot experiment the recommended doses of P and K were 25 and 67 mg dm-3, respectively. The critical level corresponding to the recommended dose, were 10.6 for P and 74.0 mg dm-3 for K in soil (Mehlich-1). For contents in shoot dry mass of physic nut seeds were 3.74, 0.18 and 3.57 dag kg-1 for N, P and K, respectively. The P recommended doses for growth, seeds and oil of physic nut in Diamantina was 87, 72 and 72 kg P2O5 per ha, respectively. In Governador Valadares, there was no nitrogen indication for the plants growth phase, for oil and seeds production and the recommended dose was 36 and 31 kg ha-1 N, respectively.
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QPPOA : framework para qualifica??o do processo de produ??o de objetos de aprendizagem / QPPOA : a framework for qualification of the process of learning objects productionGuterres, Jo?o Pedro Dewes 08 March 2017 (has links)
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Previous issue date: 2017-03-08 / The production of learning objects allied the areas of technology and education, being a key factor to bring new possibilities of learning. Due to the increase in computational resources, the production of this type of educational material grew and began to incorporate practices of software production in general, highlighting some peculiarities due to the educational objectives proposed in the objects. Thereat, the introduction of Software Engineering practices is increasingly present in the production of learning objects, and, as in software production, the qualification of this production process has become a necessity. In software production, a consolidated solution for production qualification is in the evaluation frameworks, such as CMMI and MPS.BR. In order to think this type of solution for the production of learning objects, this research presents a framework to support the reflection on the practices performed by the centers of production of learning objects. This framework is a result of the triangulation of pertinent practices related to the theme obtained from a literature review (including a systematic review and systematic mapping) and from interviews with members of nine Brazilian learning object centers. As a result obtained after the analysis of adherence of the practices by the centers, stands out its capacity to promote the reflection of the production process, as well as well as to encourage them to carry out new practices. / A produ??o de objetos de aprendizagem aliou as ?reas da tecnologia e da educa??o, sendo um fator chave para trazer novas possibilidades de aprendizagem. Devido ao aumento dos recursos computacionais, a produ??o desse tipo de material educacional cresceu e passou a incorporar pr?ticas da produ??o de software em geral, destacando-se algumas peculiaridades por conta dos objetivos educacionais propostos nos objetos. Com isso, a introdu??o de pr?ticas de Engenharia de Software est? cada vez mais presente na produ??o dos objetos de aprendizagem, e, assim como na produ??o de software, a qualifica??o deste processo de produ??o se tornou uma necessidade. Na produ??o de software, uma solu??o consolidada para qualifica??o da produ??o est? nos frameworks de avalia??o, como o CMMI e MPS.BR. De modo a pensar esse tipo de solu??o para a produ??o de objetos de aprendizagem, esta pesquisa apresenta um framework para apoiar a reflex?o sobre as pr?ticas realizadas pelos centros de produ??o de objetos de aprendizagem. Esse framework ? resultado da triangula??o de pr?ticas pertinentes relacionadas ao tema obtidas a partir de uma revis?o de literatura (incluindo uma revis?o e um mapeamento sistem?tico), de observa??es do pesquisador e de entrevistas com integrantes de nove centros brasileiros de produ??o de objetos de aprendizagem. Como resultado obtido ap?s a an?lise de ader?ncia das pr?ticas pelos centros, destaca-se a capacidade de promover a reflex?o do processo de produ??o e das pr?ticas dos centros de produ??o de objetos de aprendizagem, bem como de incentiv?-los ? realiza??o de novas pr?ticas.
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Avalia??o da ader?ncia do sistema de produ??o enxuta aplicado ? gest?o da produ??o de uma empresa automobil?sticaOLIVEIRA, Alex Pires 14 July 2009 (has links)
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Previous issue date: 2009-07-14 / In the current global scene, where the competition is increasing, it distinguished the great vehicles manufacturers dispute. The first in this ranking is Toyota Motor Company, a Japanese manufacturer who constructed a successful history since the postwar crisis period in Japan and assumed the world-wide sales leadership in 2007. This system production benchmarking is widely accepted and it is explored by the whole world assembly plants, even so its application doesn t occurs in the same standards of Toyota, what means partial implantations, mistakes in the concept or hybrid solutions that alternate between a production system and another one. This work makes an analysis on the process of lean production implantation applied in a French automobile company. The objective of this work is to identify level of adequacy of the company analyzed in relation to the rules and lean production tools in its productive process. To reach this objective company employees interviews is used, the author direct observations, searches in internal organizations documents and theoretical survey of the study object, searching to identify the employees knowledge level and the existing practical in the company that is not lined up to the lean production principles. / No cen?rio globalizado atual, onde a concorr?ncia ? crescente, destaca-se a disputa dos grandes fabricantes de ve?culos. Liderando o ranking surge a Toyota Motor Company, fabricante japonesa que construiu sua hist?ria de sucesso desde a crise do p?s-guerra no Jap?o e assumiu a lideran?a mundial em vendas no ano de 2007. O benchmarking sobre este sistema de produ??o ? amplamente aceito e explorado pelas montadoras de todo o mundo, embora sua aplica??o nem sempre ocorra nos mesmos padr?es da Toyota, ou seja, implanta??es parciais, equivocadas no conceito ou solu??es h?bridas que alternam entre um sistema de produ??o e outro. Esta disserta??o faz uma an?lise sobre o processo de implanta??o da produ??o enxuta aplicado a uma empresa francesa do ramo automobil?stico. O objetivo desta disserta??o ? identificar o grau de ader?ncia da empresa analisada em rela??o aos preceitos e ferramentas do Sistema de Produ??o Enxuta em seu processo produtivo. Para atingir este objetivo utilizam-se entrevistas aos colaboradores da empresa, observa??o direta do autor, buscas em documentos internos da organiza??o e levantamento te?rico do objeto de estudo, buscando identificar o n?vel de conhecimento dos colaboradores e as pr?ticas existentes na empresa que est?o alinhadas aos princ?pios do Sistema de Produ??o Enxuta.
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Perfil da propriedade rural em diferentes bacias leiteiras e sua influ?ncia nos desempenhos zoot?cnico e econ?mico da atividade. / Profile of the rural property in different dairy production and its influence in zootechnical and economic performances of the activitySANTOS, Dayane Aparecida 27 July 2016 (has links)
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Previous issue date: 2016-07-27 / CAPES / The aim of this study is to analyze the profile of rural properties in different dairy production and its influence in the zootechnical and economic performances of the activity. It has been analyzed a database related to milk producers who are providers to a national dairy processing industry, composed of information related to fixed capital of the property, to milk production, total costs and the income of properties located in the Northeast, South and Southeast regions of Brazil. The information from the database covered a period of 48 months (July 2010 to June 2014). Seeking to diagnose the socio-cultural profile of human resources, closed-ended questionnaires were applied to rural producers with the collaboration of technicians who watched and collected data from the properties in each individual industrial plant of the company. Each technician or producer, between July 2015 and September 2015, filled a questionnaire, completing a total of 85 samples of milk producers from different regions of the national territory that, after eliminating inconsistencies and discrepancies, allowed to a consistent sample of 33 producers. It has been extracted from the database information regarding relative and absolute composition of elements that form the total cost of production, as well as some indicators of economic efficiency. The expense items were allocated in fixed costs, variables and expenses, and later analyzed in the Safari computer program - version 1?2012. It has also been collected investment data and property income. Economic performance analysis and zootechny performance had also been made, using the procedure ANOVAG from SAEG program, version 9.1 (SAEG, 2007), comparing the averages by Tukey test to the maximum level of 5% of error. It has been observed differences in the social profile of producers and employees, as well as the production and economic performance of the properties in Brazil due to the dairy region. Producers from the Northeast had higher levels of education, and the majority of these ones, were living in the dairy property, as well as the milk producers from the Southeast and South of Brazil. The total number of employees in the properties of milk producers from Northeast is higher than in the other regions. Most of the employees of the analyzed properties had lower level of education they were living in the properties where they worked and they are male. In relation to the total cost of production, it had been observed higher results in the properties from the Northeast. Concentrated feeding, labor and depreciation were, respectively in descending order, the items with greater representation in the total costs. Among the economic performance indicators, the monthly value earned with the sale of milk was larger in the dairy producers from Northeast. The values of Gross Margin and Net Margin were positive, indicating that the properties are being paid in the short term. The Total Revenue is greater than the Average Costs thus dairy farming is economically viable. The results were positive ROIC in the properties of basins Southeast and South, the activity is remunerating capital assets, and the producer can continue in business. Within zootechny performance indicators, the productivity by area and by employee, the daily milk production by cow and by lactation were superior to the South milk producers. / Este trabalho objetivou analisar o perfil das propriedades rurais em diferentes bacias leiteiras e sua influ?ncia nos desempenhos zoot?cnico e econ?mico da atividade. Foi analisado um banco de dados relativos a produtores de leite fornecedores de uma ind?stria de transforma??o de leite e produ??o de l?cteos de ?mbito nacional, composto por informa??es referentes ao capital imobilizado da propriedade, ? produ??o de leite, aos custos totais e a renda de propriedades localizadas nas regi?es Nordeste, Sul e Sudeste do Brasil. As informa??es do banco de dados compreenderam um per?odo de 48 meses (julho/2010 a junho/2014). Para diagnosticar o perfil sociocultural dos recursos humanos, aplicou-se question?rios fechados aos produtores rurais, com colabora??o dos t?cnicos que assistiam e coletavam dados das propriedades em cada planta industrial da empresa. Cada t?cnico ou produtor, entre julho/2015 e setembro/2015, preencheu um question?rio, perfazendo um total de 85 amostras de produtores de leite de diferentes regi?es do territ?rio nacional que, ap?s elimina??o de inconsist?ncias e incongru?ncias, permitiu a uma amostra consistente de 33 produtores. Foram extra?dos do banco de dados informa??es concernentes ? composi??o relativa e absoluta dos elementos que compunham o custo total de produ??o, bem como alguns indicadores de efici?ncia econ?mica. Os itens de disp?ndios foram alocados em custos fixos, vari?veis e despesas e posteriormente analisados no programa computacional Safari ? vers?o 1/2012. Tamb?m foram coletados os dados de investimentos e de renda da propriedade. Foram feitas an?lise de desempenho econ?mico e zoot?cnico, utilizando-se o procedimento ANOVAG do programa SAEG, vers?o 9.1 (UFV, 2007), sendo as m?dias comparadas por teste Tukey ao n?vel m?ximo de 5% de erro. Foi observado diferen?as no perfil social dos produtores e dos funcion?rios, assim como nos desempenhos produtivo e econ?mico das propriedades no Brasil em fun??o da bacia leiteira. No Nordeste os produtores possu?am maiores n?veis de escolaridade, e estes, em sua maioria, residem na propriedade leiteira, assim como os produtores das bacias Sudeste e Sul. Na bacia nordestina n?mero total de funcion?rios das propriedades ? superior ao das demais regi?es. A maioria dos funcion?rios das propriedades estudadas possui baixo n?vel de escolaridade, residem na propriedade e s?o do g?nero masculino. Foi observado resultados mais elevados de custo total de produ??o nas propriedades nordestinas. A alimenta??o concentrada, a m?o de obra e a deprecia??o foram, em ordem decrescente respectivamente, os itens com maior representa??o nos custos totais. Dentre os indicadores de desempenho econ?mico, o valor mensal da venda do leite foi maior na bacia Nordeste. Os valores de Margem Bruta e Margem L?quida foram positivos, indicando que as propriedades est?o sendo remuneradas no curto prazo. A Receita Total ? maior que os Custos M?dios, assim, a atividade leiteira ? vi?vel economicamente. Os resultados do ROIC foram positivos nas propriedades das bacias Sudeste e Sul, a atividade est? remunerando o capital imobilizado, e o produtor pode continuar no neg?cio. Dentro dos indicadores de desempenho zoot?cnico, a produtividade por ?rea e por funcion?rio, a produ??o de leite por vaca por dia e por lacta??o foram superiores na bacia Sul.
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Aspectos fenol?gicos e m?todos de amostragem para quantifica??o da produ??o em syngonanthus (Eriocaulaceae). / Phenological and sampling methods to quantification the production Syngonanthus (Eriocaulaceae).Barcelos, Alexandre de Oliveira January 2010 (has links)
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Previous issue date: 2010 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Os Campos Rupestres s?o o centro de diversidade gen?tica da fam?lia Eriocaulaceae. A cidade de Dimantina-MG ? considerada o maior polo de extra??o e comercializa??o de sempre-vivas no pa?s. Para muitas fam?lias, a extra??o de sempre-vivas constitui a principal fonte de renda, o que gerou a coleta predat?ria de muitas esp?cies que atualmente fazem parte da lista vermelha de esp?cies amea?adas de extin??o, acarretando a proibi??o da exporta??o dessas esp?cies. A presente pesquisa avaliou a fenologia de tr?s esp?cies de sempre-vivas: S. elegans, S. venustus e S. bisulcatus, em uma ?rea experimental de cultivo. As esp?cies apresentam comportamento fenol?gico semelhante quanto ?s ?pocas e dura??o das fenofases. Apresentaram grande crescimento vegetativo at? dezembro, m?s no qual se inicia a produ??o de escapos. A presen?a de cap?tulos em antese ocorreu na segunda quinzena de janeiro em S. bisulcatus, e em mar?o nas outras esp?cies. Entre os meses de abril e maio, teve in?cio a frutifica??o para as tr?s esp?cies, sendo observada em maio a presen?a de sementes imaturas, per?odo em que acontece a coleta para comercializa??o, prejudicando o recrutamento de novos indiv?duos. A pesquisa tamb?m objetivou o desenvolvimento de metodologias para compara??o e defini??o de m?todos de amostragem que possibilitam a avalia??o da produ??o em ?reas de ocorr?ncia de sempre-vivas. Os resultados obtidos se mostram preliminares, por?m, o uso de parcelas de 60 ou 100m2 e a p?s-estratifica??o se mostraram eficientes na amostragem de campos de ocorr?ncia de S. elegans. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2010. / ABSTRACT ?Campos Rupestres? are the Centre of genetic diversity of Eriocaulaceae. Diamantina ? MG is considered the highest polo of extraction and commercialization of everlasting flowers, being it the more important source of income for many families. This situation generated predatory collection of species that are nowadays threatened of extinction, causing the prohibition of exporting. This study used an experimental area in order to evaluate three everlasting species: S. elegans, S. venustus and S. bisulcatus. Species showed similar phenological behaviour relating to times and stages. Up to December they showed high vegetative growth, the month when scapes production is initiated. Capitula under anthesis occurred at the second fifteen days to S. bisulcatus, and in March to the other species. Between April and May fructification started to three species, being noticed the presence of immature seeds in May. At this time, collection happens in order to commercialize, having a negative impact on new individual recruitment. This study aimed also to develop methodologies to compare and define sampling methods to provide production evaluation in areas of everlasting flowers. Results seem preliminar, however, using parcels of 60 or 100m2 and post-stratification are efficient on sampling at S. elegans fields.
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