Produtividade e qualidade de inflorescências de tango (Solidago canadensis L.) em função de densidades populacionais e do número de hastes por planta

• Ano de defesa: 2008
• Autor(a) principal: Sá, Perciane Gonçalves de
• Orientador(a): Barbosa, José Geraldo
• Banca de defesa: Leite, Roberto de Aquino , Moraes, Paulo José de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Solidago canadensis; Flores; Produção
• Palavras-chave em Inglês: Solidago canadensis; Flowers; Production
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FLORICULTURA, PARQUES E JARDINS::FLORICULTURA
• Link de acesso: http://locus.ufv.br/handle/123456789/4495

To evaluate the effect of population densities and the number of stems on the production and quality of inflorescences of tango, an experiment in the CBD was deployed, with split plots, allocating the plots to the planting densities (20, 25, 30 and 35 plants / square meter), and in the subplots, the number of stems per plant (2, 3 or 4), with 4 repetitions, 2 plants per repetition. The harvest occurred when the inflorescences achieved the commercial point (opening of the flowers of the apex). At this moment, fresh and dry mass per unit of stem, per plant and per sqm, diameter of the base and the total length of the stems, length and diameter of inflorescences, number of leaves and flowers branches and production cycle were evaluated. We evaluated two successive cycles of production. The data were submitted to the analysis of variance by F test and regression analysis. There was no effect of interaction between the number of stems per plant and density of planting for the characteristics evaluated in two cycles. In the first cycle, it was found that the plants conducted with 2 stems had greater fresh mass per unit of stem and the base of the stem diameter, length and diameter of inflorescence and number of flowers branches. The plants conducted with 4 stems had greater fresh and dry mass per plant and per unit area. There was no effect on the number of stems on the entire length of flowering stem, the number of leaves and the cycle. The densities of planting promoted linear increase in total length and inflorescence stems of plants conducted with 3 stems, linear reduction in fresh and dry mass per plant in plants conducted with 4 stems, and linear increase for fresh and dry mass per sqm in all systems of conducting (2, 3 and 4 stems). In the second cycle, it was observed that the plants conducted with 3 and 4 stems showed higher dry mass per plant and per unit area. Regarding fresh mass per plant and fresh mass per unit area, plants conducted with 3 and 4 stems were similar to each other and superior to those conducted with 2 stems. The number of stems per plant did not affect the other characteristics evaluated in this cycle. The densities of planting promoted linear reduction in the length of the inflorescence, in the diameter of the base of the stem and the number of flowers branches in the conducting system with 2 stems, linear reduction in the number of flowers branches, in fresh and dry mass per unit of stem and in fresh and dry mass per plant in the conducting system with 4 stems. There was no effect of density on the total length, the diameter of the inflorescence, the number of leaves and the fresh and dry masses per area. Plants conducted with 2 stems produced stems of better quality for most of the characteristics evaluated in both cycles. Considering the two cycles, the conducting system with 2 stems in density of 25 plants / sqm surpassed in relation to the production of packets and the percentage of stems in commercial length.