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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

Identifica??o e avalia??o de esp?cies de interesse forrageiro e a percep??o de produtores familiares da Reserva de Desenvolvimento Sustent?vel Aman?, Amazonas, Brasil / Identification and evaluation of feed species and the perception of smallholder farmers from the Aman? Sustainable Development Reserve, Amazonas, Brazil

Araujo, Paula de Carvalho Machado 28 April 2016 (has links)
Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2017-11-07T13:04:43Z No. of bitstreams: 1 2016 - Paula de Carvalho Machado Araujo.pdf: 2347237 bytes, checksum: 44b7c9cb3df1557a677fc89555c2a535 (MD5) / Made available in DSpace on 2017-11-07T13:04:43Z (GMT). No. of bitstreams: 1 2016 - Paula de Carvalho Machado Araujo.pdf: 2347237 bytes, checksum: 44b7c9cb3df1557a677fc89555c2a535 (MD5) Previous issue date: 2016-04-28 / This study was conducted in the Aman? Lake and Paran? region of the Aman? Sustainable Development Reserve located in the middle Solim?es region, state of Amazonas, Brazil. Research was done in three phases: the first used an adapted Free List method with 13 ranchers from the region. Subsequently, botanical specimens of species cited by at least three farmers were collected; photographic registers of these plants were also taken. Photographs were used in the next phase of research to inform a questionnaire applied to the same 13 farmers; the instrument used the Semantic Differentiation method, of 7 points, to understand ranchers? perceptions of the diverse characteristics of selected plants. The main objective of this study was to evaluate the perception of ranchers in relation to the origin, environment, and characteristics of plants that are part the of cow and water buffalo diet; and to further understand the cultural relevance, feed potential, and ecological function of these plants, comparing farmers? perceptions with findings from the scientific literature. In total 84 plant names were compiled, with 29 evaluated in this project / Este trabalho teve como ?rea de estudo o Lago e Paran? do Aman?, na Reserva de Desenvolvimento Sustent?vel Aman?, localizada na regi?o do M?dio Solim?es, no estado do Amazonas. Foram realizadas tr?s etapas da pesquisa: na primeira, utilizou-se uma adapta??o do m?todo de Lista Livre junto a 13 criadores da regi?o. Em seguida, foi realizada coleta bot?nica das esp?cies citadas por pelo menos 3 criadores, obtendo ainda registro fotogr?fico das mesmas. Estas fotos foram utilizadas na etapa seguinte a fim de ilustrar um question?rio com os mesmos 13 criadores onde utilizou-se o m?todo de Diferencial Sem?ntico de 7 pontos para conhecer as percep??es dos criadores sobre diversas caracter?sticas das plantas selecionadas. Este trabalho teve por objetivo principal avaliar a percep??o dos criadores da regi?o em rela??o ? origem, ambiente e caracter?sticas das plantas que fazem parte da dieta de bovinos e bubalinos, tentando compreender a relev?ncia cultural, o potencial forrageiro e as fun??es ecol?gicas das mesmas atrav?s das percep??es e dos achados de literatura. No total foram contabilizados 84 nomes diferentes de plantas, tendo sido avaliadas 29 plantas
2

Conserva??o de esp?cies nativas em um assentamento rural do munic?pio de Apodi-RN: impactos socioambientais e econ?micos e o uso da biotecnologia como alternativa promissora / Conservation of native species in a rural settlement of the couty of Apodi-RN: social, environmental and economic impacts and the use of Biotechnology as a promising alternative

Bezerra, Rafaela Maria de Fran?a 01 March 2013 (has links)
Made available in DSpace on 2014-12-17T15:55:04Z (GMT). No. of bitstreams: 1 RafaelaMFB_DISSERT.pdf: 2000574 bytes, checksum: c72aa51b49be48bfd2402d6136436b13 (MD5) Previous issue date: 2013-03-01 / The Caatinga biome has a high diversity of potential and their conservation constitutes one of the greatest challenges of Brazilian science. The sustainable management of the Caatinga emerges as an alternative that through the formation of systems agrossilvipastoris, enables the use of forest resources sustainably, ensuring their conservation, regeneration and recovery. In RN this technique has been developed mainly in settlements of Agrarian Reform, such as P. A. Moaci Lucena, and their impacts go beyond the environmental aspect and reverberate socially and economically on the quality of life of family farmers. Despite the efficiency of the Sustainable Management of the Caatinga in the conservation of native species, many forests species of this biome faces serious problems of propagation and for this reason have become vulnerable to extinction, as is the case of Mimosa caesalpiniifolia Benth . Thus , it is evident the need to use sustainable alternatives to overcome the difficulties of propagation of this species and enable their replacement in areas where their existence is threatened. The Plant Biotechnology is considered as a promising alternative in this sense, considering that by micropropagation enables the large-scale production of seedlings with high health genetics status. This work has the following objectives: evaluate the perception of family farmers of P. A. Moaci Lucena in relation to social, environmental and economic impacts of the Sustainable Management of the Caatinga and check the conditions of germination and in vitro propagation of Mimosa caesalpiniifolia Benth that enabling the production of seedlings of this specie on a large scale. To achieve the first objective, semi-structured interviews showed that in the perception of farmers PA Moaci Lucena, the Sustainable Management of the Caatinga was responsible for generating many social, environmental and economic impacts that affected directly in the improvement in the quality of life of the families of the Settlement Project Moaci Lucena. Have to achieve the second objective, were investigated the influence of different substrates and concentrations of growth regulator BAP in the germination and shoot induction in vitro of Mimosa caesalpiniifolia Benth. The vermiculite was presented as the most suitable substrate for germination of this species, because it provided a more rapid germination, higher growth rates and higher dry matter accumulation. Regarding micropropagation, the concentration of 17.76 μmol/L of BAP presented a more responsive in relation to multiplication rate and the number of shoots in M. caesalpiniifolia, thus constituting the most suitable concentration for the in vitro propagation of this specie / O bioma Caatinga apresenta elevada diversidade de potenciais e a sua conserva??o constitui-se um dos maiores desafios para a ci?ncia brasileira. O Manejo Sustent?vel da Caatinga surge como uma alternativa que mediante a forma??o de sistemas agrossilvipastoris, viabiliza a utiliza??o dos recursos florestais de forma sustent?vel, assegurando a sua conserva??o, regenera??o e recupera??o. No Rio Grande do Norte essa t?cnica tem sido desenvolvida principalmente em Projetos de Assentamentos de Reforma Agr?ria, como ? o caso do P. A. Moaci Lucena, e seus impactos ultrapassam a vertente ambiental e repercutem social e economicamente na qualidade de vida de agricultores familiares. Apesar da efici?ncia do Manejo Sustent?vel da Caatinga na conserva??o de esp?cies nativas, muitas esp?cies florestais nativas deste bioma enfrentam s?rios problemas de propaga??o e por este motivo encontram-se vulner?veis ? extin??o, como ? o caso da Mimosa caesalpiniifolia Benth. Deste modo, fica evidente a necessidade de se utilizar alternativas sustent?veis que permitam contornar as dificuldades de propaga??o dessa esp?cie e viabilizem a sua reposi??o em ?reas onde a sua exist?ncia encontra-se amea?ada. A Biotecnologia Vegetal ? considerada como uma alternativa promissora nesse sentido, haja vista que mediante a micropropaga??o viabiliza a produ??o em larga escala de mudas com elevada qualidade fitossanit?ria e gen?tica. Este trabalho possui os seguintes objetivos: avaliar a percep??o dos agricultores familiares do P.A. Moaci Lucena em rela??o aos impactos socioambientais e econ?micos advindos do Manejo da Caatinga e verificar as condi??es de germina??o e propaga??o in vitro de Mimosa caesalpiniifolia Benth que viabilizem a produ??o de mudas dessa esp?cie em larga escala. Para se alcan?ar o primeiro objetivo, foram realizadas entrevistas semiestruturadas que permitiram concluir que na percep??o dos agricultores familiares do P.A. Moaci Lucena, o Manejo Sustent?vel da Caatinga foi respons?vel pela gera??o de diversos impactos socioambientais e econ?micos positivos que repercutiram diretamente na melhoria da qualidade de vida das fam?lias desse assentamento. J? para se alcan?ar o segundo objetivo, foi verificada a influ?ncia de distintos substratos e concentra??es do regulador de crescimento BAP na germina??o e indu??o de brota??es in vitro de Mimosa caesalpiniifolia Benth. A vermiculita apresentou-se como o substrato mais adequado para germina??o de sementes desta esp?cie, pois proporcionou uma germina??o mais r?pida, maiores taxas de crescimento e 9 o maior ac?mulo de mat?ria seca. Em rela??o ? micropropaga??o, a concentra??o de 17,76 μmol/L de BAP apresentou-se mais responsiva em rela??o ? taxa de multiplica??o e ao n?mero de brota??es em M. caesalpiniifolia, constituindo-se, portanto, a concentra??o mais indicada para a propaga??o in vitro dessa esp?cie

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