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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

InfluÃncia do espaÃamento, altura de corte e idade de primeiro corte na produtividade de capim santo. / Influence of the spacing, the cut height and the ideal age of first cut in the lemmon grass productivity.

Aurilene Vasconcelos Vieira 22 February 2006 (has links)
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / A utilizaÃÃo das plantas medicinais à uma das mais antigas armas empregadas para o tratamento das enfermidades humanas e muito jà se conhece a respeito de seu uso por parte da sabedoria popular. O capim santo (Cymbopogon citratus (DC.) Stapf) à uma planta medicinal e aromÃtica, pertencente à famÃlia Poaceae. Este trabalho teve como objetivo determinar o espaÃamento de plantio, a altura de corte e a idade ideal de primeiro corte, visando obter o maior rendimento em Ãleo essencial. Para tanto instalou-se em dezembro de 2004, um experimento, na Ãrea da Fazenda Experimental do Vale do Curu (F.E.V.C.), pertencente ao Centro de CiÃncias AgrÃrias da Universidade Federal do CearÃ, localizada no municÃpio de Pentecoste/Ce. O referido experimento era composto dos seguintes tratamentos: trÃs espaÃamentos (0,5m x 0,5m; 0,5m x 0,8m e 0,8m x 0,8m); trÃs Ãpocas distintas de primeiro corte (04, 06 e 08 meses) e duas alturas de corte (15cm e 30cm do solo), com 04 repetiÃÃes, sendo realizado mais dois cortes em cada tratamento em intervalos de 04 meses. O delineamento experimental utilizado foi em blocos ao acaso em esquema fatorial 3 x 3 x 2. Os dados obtidos foram transformados para produÃÃes por hectare. Quanto à idade de corte, a melhor produÃÃo de Ãleo essencial foi obtida aos seis meses, o mesmo nÃo se verificando para a matÃria seca que teve crescimento contÃnuo. O inicio da colheita aos seis meses apÃs o plantio no espaÃamento de 0,5m entre plantas e 0,5m entre fileiras promoveu a maior produÃÃo de matÃria seca e do Ãleo essencial de capim santo. No que se refere à altura de corte, tanto a produÃÃo de biomassa quanto o rendimento de Ãleo essencial foram mais elevados na altura de 15cm do solo. Portanto, o C. citratus deve ser cultivado no espaÃamento 0,50m x 0,50m, colhido a altura de 15cm do solo, com primeira colheita aos 6 meses de idade e cortes consecutivos a cada quatro meses para se obter o maior rendimento em Ãleo essencial. / The use of the medicinal plants is one of the oldest weapons maids for the treatment of the human illnesses and it is very already known regarding its use on the part of the popular wisdom. The sacred grass (Cymbopogon citratus (DC.) Stapf) it is a medicinal and aromatic plant, belonging to the family Poaceae. This work had as objective determines the planting spacing, the cut height and the ideal age of first cut, seeking to obtain the largest income in essential oil. For this, was settled in December of 2004, an experiment, in the area of Experimental Farm of the valley of Curu (F.E.V.C.), belonging to the Agrarian Sciences Center of the Federal University of CearÃ, located in the municipal district of Pentecoste/Ce. The referred experiment was composed of the following treatments: three spacings (0,5m x 0,5m; 0,5m x 0,8m and 0,8m x 0,8m); three different times from first cut (04, 06 and 08 months) and two cut heights (15cm and 30cm of the soil), with 04 repetitions, being accomplished more two cuts in each treatment in intervals of 04 months. The used experimental delineation was in blocks at random in factorial outline 3 x 3 x 2. The obtained data were transformed for productions by hectare. As for the cut age, the best production of essential oil was obtained to the six months, the same if not verifying for the matter dries that had continuous growth. The begin of the crop to the six months after the planting in the 0,5m spacing between plants and 0,5m among rows promoted the largest production of dry matter and of the essential oil of sacred grass. About the cut height, as much the biomass production as the income of essential oil they were higher in the height of 15cm of the soil. Therefore, the C. citratus should be cultivated in the spacing 0,50m x 0,50m, picked the height of 15cm of the soil, with first harvest to the 6 months of age and consecutive cuts every four months to obtain the largest income in essential oil.

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