تاثير ازت و فسفر بر رشد و ميزان اسانس Artemisia annua L

The effect of nitrogen and phosphorus on yield and essential oil of Artemisia annua L.

The purpose of this study was determining the effects of different nitrogen and phosphorus doses on the plant growth parameters, yields and essential oil composition of Artemisia annua L. The effect of nitrogen (urea 46%) and phosphorus (Triple super phosphate %48) at four levels (0, 40, 80, 120 kglha) were examined. Experiments were designed based on Randomized Complete Block with 16 treatments and 3 replicates. Results indicated that differences between the average of height, number of branches and dry weight were significant at pSO.05. The maximum of branches number and height of plant were gained in the N40P40 and N80NO treatments. Increasing of P fertilizer more than 80 kg/ha decrease the growth parameters significantly. Essential oil of leaves at flowering stage was obtained by hydro-distillation. Percentage of essential oil showed significant increase in N40PO and N80PO treatments. Chemical compounds of leaf oil were identified by GCIMS. Twenty four components were found which the major compounds were artemisia ketone, camphor, 1,8-cineole, artemisia alcohol, viridiflorene and alpha-pinene