Efeitos de lâminas de irrigação sobre as características de crescimento, produção e qualidade de óleo essencial de capim-limão

• Ano de defesa: 2010
• Autor(a) principal: Pinto, Daniela Alencar
• Orientador(a): Mantovani, Everardo Chartuni
• Banca de defesa: Santos, Ricardo Henrique Silva , Souza, Maurício Novaes
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Meteorologia Agrícola
• Departamento: Agrometeorologia; Climatologia; Micrometeorologia
• País: BR
• Palavras-chave em Português: Cymbopogon citratus; Lâminas de irrigação; Óleo essencial
• Palavras-chave em Inglês: Cymbopogon citratus; Irrigation depths; Essential oil
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::AGROMETEOROLOGIA
• Link de acesso: http://locus.ufv.br/handle/123456789/5239

Lemongrass, Cymbopogoncitratus (DC) Stapf is a medicinal plant widely known and used in many countries for medical purposes and is used and applied in the pharmaceutical, food, cosmetics and perfumery industries. Due to the little information on cultivation practices to optimize its production, the aim of this work is to evaluate the effect of different irrigation depths on biomass production, yield and composition of essential oil.The experiment was set up in a protected environment to control irrigation and also to evaluate situations in which the normal climatic conditions are inadequate. A complete randomized block design was incorporated with five treatments and three replications, averages were compared using the Tukey test at 5% probability.In phase one, the treatments consisted of irrigation depths relating to 50%, 75%, 100%, 125% of crop evapotranspiration (ETc), watering twice a week and irrigating only once a week for a sample supplied with 100% of the crop evapotranspiration (ETc);these were labeled T1, T2, T3, T4 and T5, respectively.In phase two, the treatments consisted of depths of 50%, 75%, 100%, 125% of the ETc, irrigating once a week and another with 100% ETc, irrigating every 14 days, which were denominated T6, T7, T8, T9 and T10, respectively. Harvest of the lemon grass was done after 60 days of treatments. Plant height, number of tillers per plant, dry mass of the shoots, yield and composition of essential oil were evaluated.Treatment T5, characterized by water stress and a moderate irrigation interval, presented the highest dry matter production,lemongrass productivity, estimate of essential oil productivity and concentration of citral in the first phase.In phase two of this work, T6 corresponded to a sharp increasing water stress, which presented the greatest estimate of essential oil productivity.A ccording to the results observed, it was not possible to define an optimal irrigation depth, however, it was concluded that a single irrigation per week for the conditions of this experiment provided the best result.