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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

A biotecnologia vegetal como alternativa para a cotonicultura familiar sustent?vel

Silva, Kl?ptura de Oliveira e 23 August 2006 (has links)
Made available in DSpace on 2014-12-17T15:55:07Z (GMT). No. of bitstreams: 1 KlepturaOS.pdf: 1910860 bytes, checksum: 716bf4a5a483f5ccf48509ed1dae3714 (MD5) Previous issue date: 2006-08-23 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This paper aims to describe the familiar cotton culture in the districts of Tangar? and Triunfo Potiguar, located in the state of Rio Grande do Norte. It relates specific problems that small cotton agriculturists face in the cotton production and sale as well as their perception in relation to public policies that have been put into practice in these districts. The research revealed soils with potentiality for the cotton culture, but that are not being cultivated for anything else but subsistence, not being able to become productive, specifically through the cotton culture. That activity should be practiced so that it preserves the environment and the familiar farmers themselves, since it was verified they are constant1y exposed to health problems due to insecticides use. In what refers to fomentation policies it was observed that bureaucracy delays the liberation of the money destined to production, seeds delivery and other actions related to production and commercialization. Some procedures such as information and training about productivity development and attention with the environrnent and infrastructure are recommended. The results indicate lack of investments, rural credit and technical help, main1y in Triunfo Potiguar. There is unanimity, from the rural farmers of that district in what refers to the desire of improving the production and remaining in that activity. In this sense, the contribution of this research for the most appropriate culture production can be materialized through the technique of tissue's culture, aimed at obtaining plants that are resistant to diseases. The data indicated that the hormonal supplementations used induced regenerative calluses making in vitro morphogenesis possible in alI tested varieties. The use of the activated coal antioxidant was efficient, reducing oxidation, however not suppressing it. The results lead to an opportunity for the familiar t?rmers from Rio Grande do Norte enlarge the cotton culture, because to obtain plants that are resistant to diseases implies in insecticides reduction, propitiating smaller impact to the atmosphere and less cost / Este trabalho tem como objeto de estudo a cotonicultura familiar nos Munic?pios de Tangar? e Triunfo Potiguar, localizados no Estado do Rio Grande do Norte. Discute problemas espec?ficos que os pequenos cotonicultores enfrentam para a produ??o e a venda do algod?o bem como sua percep??o quanto ?s pol?ticas p?blicas que v?m sendo postas em pr?tica nos munic?pios. A pesquisa revelou ?reas cultiv?veis com potencialidade para a cotonicultura, mas que, n?o est?o sendo cultivados para al?m da subsist?ncia, deixando de se tomarem produtivos, especificamente atrav?s da cotonicultura. Essa atividade deve ser praticada de forma que preserve o meio ambiente e os pr?prios agricultores familiares, pois se constatou estarem estes expostos permanentemente a problemas de sa?de decorrentes do uso de agrot?xicos. No que diz respeito ?s pol?ticas de fomento observou-se que, a burocracia dificulta a libera??o, em tempo ?gil, dos cr?ditos destinados ? produ??o, ? libera??o de sementes e a outras a??es voltadas para a produ??o e a comercializa??o. Recomendam-se alguns procedimentos, como informa??o e capacita??o voltadas para o desenvolvimento da produtividade e do cuidado com o meio ambiente, e aten??o para a infra-estrutura. Os resultados indicam car?ncia de investimentos, de cr?dito rural e de assist?ncia t?cnica, principalmente em Triunfo Potiguar. H? unanimidade, por parte dos agricultores rurais desse munic?pio, quanto ao desejo de melhorar a produ??o e permanecer nessa atividade. Nesse sentido, a contribui??o da pesquisa para a produ??o mais adequada de cultivares pode ser materializada atrav?s das t?cnicas de cultura de tecidos, com o objetivo de se obterem plantas resistentes a doen?as. Os dados indicam que as suplementa??es hormonais utilizadas induziram calos regenerativos possibilitando a morfog?nese in vitro em todas as variedades testadas. O uso do antioxidante carv?o ativado mostrou-se eficiente, reduzindo a oxida??o, por?m n?o a suprimiu. Os resultados ensejam uma oportunidade para os agricultores familiares do Rio Grande do Norte ampliarem a cotonicultura, pois a obten??o de plantas resistentes a doen?as implica redu??o no uso de agrot?xico, propiciando menor impacto ao ambiente e menos custo

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