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O alecrim é planta exótica e o interesse no seu cultivo tem crescido ao longo dos anos, pois pode ser utilizado tanto para fins medicinais como aromáticos; no entanto, o conhecimento fitotécnico sobre a espécie é bastante limitado. Dessa forma, o trabalho objetivou avaliar a influência da altura de corte e do intervalo destes sobre a produção de biomassa e no rendimento do óleo essencial de alecrim. O experimento foi realizado no Instituto Agronômico, em Campinas - SP, no período de janeiro de 2006 a julho de 2007. O delineamento experimental utilizado foi em blocos ao acaso, com 8 tratamentos em esquema fatorial 2 x 4, sendo duas alturas de corte (20 e 40 cm) e quatro intervalos entre cortes (60, 80, 100, 120 dias) e três repetições. Foram avaliadas as características altura da planta, massa seca da parte aérea, rendimento e qualidade do óleo essencial. Observou-se que maiores intervalos entre cortes proporcionaram maior altura da planta e maior massa seca da parte aérea. O rendimento e a qualidade do óleo essencial não foram afetados ao longo do período experimental. Rosemary is an exotic plant and the interest in its cultivation has been growing along the years, because it can be used for medicinal or aromatic ends, however the agricultural knowledge about the species is quite limited. The goal of this research was to evaluate the influence of the cutting height and of the interval of these cuts on the biomass production and on the yield of the rosemary essential oil. The experiment was conducted at the Agronomical Institute, in Campinas - SP, from January 2006 through July 2007. It was organized in a completely randomized design with 8 treatments in a 2 x 4 factorial system, with two cutting heights (20 and 40 cm) and four intervals between cuts (60, 80, 100, 120 days) and three replications. Characteristics such as plant height, dry mass of the aerial part, yield and quality of its essential oil were evaluated. It was observed that longer intervals among cuttings provided longer height of the plant and greater dried mass of the aerial part. The yield and the quality of the essential oil were not affected throughout the experimental period

Produção de biomassa e óleo essencial de alecrim (Rosmarinus officinalis L.) em função da altura e intervalo entre cortes