Produção de biomassa, teor e rendimento de óleo essencial de Otacanthus Azureus (Linden) Ronse em função da adubação orgânica e épocas de corte, em Manaus, AM

Abstract

Otacanthus azureus (Linden) Ronse is a plant native to southeastern Brazil, being found under cultivation or adapted in northern Brazil. By reason of being a plant still in the process of domestication is the need for research to define a cropping system that maximizes the production of essential oil. Thus, this study aimed to evaluate the effect of adding organic fertilizer - cattle manure - and harvest times in the production of leaf biomass and essential oil O. azureus in Manaus - AM. The experiment was conducted in the Department of Medicinal Plants, Faculty of Agrarian Sciences, Federal University of Amazonas - UFAM, from Dec/2009 to set/2010. The experimental design was completely randomized in a 3x4 factorial design with four repetitions, comprising three harvest times (march, june and september) and four levels of organic fertilization with cattle manure (0%, 20%, 33% and 50%). The organic fertilization with cattle manure had an effect on leaf biomass production and essential oil of O. azureus, and the treatments with 20% and 33% were statistically equal and superior to other treatments. Most essential oil production in plants of O. azureus was obtained in the first cut. It recommended that the percentage of 20% by spending less on fertilization