Abstract
The current study is carried out the effect of Nitrogen fertilization in levels (0, 46, 92, 138) kg/h and spraying of gibberllic acid at concentration (0, 50, 100) ppm and the Algamix at concentration (1,2) ml/L in percentage ratio for concentration of some active constituents for the oil of two species of Mentha (M. piperita and M. spicata). The result was showed, that the samples of oil was contained the following compounds: (Camphor, Menthone, Menthyl acetate, Menthol and Thymol), using the Gas-liquid Chromatography technique (GLC). It's illustrated that the summer harvest was exceeded to gave the highest concentration of menthone compounds about 11.47% without fertilization (N0) with spraying of algamix at concentration 1 ml/L of M. spicata, as well as thymol compound about 16.69% in fourth level of fertilization 138 kg/h with out spraying of M.spicata too. While, the autumn harvest was exceeded increasing percentage of camphor compound about 0.20% in the fourth level of fertilization 138 kg/h with spraying of algamix at concentration 1ml/L of M. piperita and Menthol compound which was presented 46.50% in the second level of fertilization 46 kg/h without spraying, and also Menthyl acetate at concentration 50.06% in the same level of fertilization of M. piperita with spraying of Algamix at concentration 1ml/L.
