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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.
| Identifer | oai:union.ndltd.org:IBICT/oai:acervo.ufvjm.edu.br/jspui:1/532 |
| Date | January 2010 |
| Creators | Barcelos, Alexandre de Oliveira |
| Contributors | Garcia, Queila de Souza, Oliveira, Maria Neudes Sousa de, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Oliveira, M?rcio Leles Romarco de |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFVJM, instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri, instacron:UFVJM |
| Rights | info:eu-repo/semantics/openAccess |
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