Influence of Co-distillation with Weed Biomass on Yield and Chemical Composition of Rose-Scented Geranium(Pelargonium Species)Oil

摘要

A laboratory experiment was performed to study the influence of distilling rose-scented geranium(Pelargonium species)biomass together with different proportions(0,5,10,15 and 30%by weight of rose-scented geranium biomass)of biomass of weed species growing in rose-scented geranium fields,on the yields%and compositions of oils of cultivars Algerian,Bourbon and Kelkar.Crop:weed mixtures reduced oil yields of all the three cultivars in comparison to control(pure crop biomass).Combined distillation of biomass of cv.Algerian with weed biomass decreased the concentrations of linalool,geraniol,geranyl formate,10-epi-gamma-eudesmol and increased the contents of isomenthone,citronellol and citronellyl formate in its oil.This distillation method resulted in enhancements in isomenthone,citronel-lol and reductions in geraniol and geranyl formate in the oil of cv.Bourbon.In cv.Kelkar,the percentages of linalool and isomenthone increased,but that of citronellol and geraniol decreased in crop:weed mixed distillations.