Trials on the application of fertilization combined with plant hormone spraying for improving the production of carnation absolute oil

To complete our previous studies on carnation (dianthus caryophyllus l) absolute oil to introduce it as a new sources of essential oils under egyptian conditions so,this study focused on the effect of fertilization combined with growth regulator on the flowers and absolute oil yield of carnation. three level of fertilization treatments were used. a recommended fertilization dose was applied as a basic levels (bl = 1.5 g n + 2.25 g k2o / m2.). two other treatments,as a low level of fertilization,(ll =bl - 1/4 dose of bl) and a high level of fertilization (hl) =bl + 1/4 dose of bl) were applied. the application of fertilizer was carried out successively every month. the two growth regulators substances were used in this experiment which,two concentrations of growth retardant (cycocel - ccc) as 2000 and 3000 ppm and one dose of gibberellic acid (ga3) as 100 ppm. were applied at monthly interval starting on 10thnovember. the treatment for the combined between ccc (2000 ppm) x ga3 (100 ppm) were alternately sprayed also on month intervals. alternative sprays of growth retardant (ccc) and growth regulators (ga3 )was a promising practices in rising the carnation flowers yield especially with using the high level of fertilization. using basic level of fertilization combined with ccc2 gave the highest percentage of absolute oil compared with the other treatments. eugenol and benzyl benzoate were found as the main components of carnation absolute essential oil from egypt. © 2017,university of mohammed premier oujda morocco.