Author/Authors :
Hashemabadi، D. نويسنده Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran , , Mostofipour، A.A. نويسنده Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran , , Berimavandi، A.R. نويسنده Department of Agronomy, Rasht Branch, Islamic Azad University, Rasht, Iran , , Kaviani، B. نويسنده , , Zarchini، M. نويسنده Young Researchers Club, Rasht Branch, Islamic Azad University, Rasht, Iran. ,
Abstract :
This study was done to evaluate the effect of different planting arrangements
(square, lozenge and rectangular) and various concentrations of potassium
sulfate (K2SO4) fertilizer (0, 100, 200 and 300 kg/ha) on yield and essential
oils quantitative of Calendula officinalis L., a medicinal and ornamental plant.
The experiment was done as a factorial in randomized completely blocks
design (R.C.B.D.) with 3 replications. The results showed that the plant
height, the number of flowers, flowers dry weight, potassium content of aerial
part, flower essential oil and carotenoids content in petals were significantly
increased. The highest plant height (54.18 cm) was calculated from plants
grown under 200 kg/ha K2SO4 and rectangular arrangement. Maximum number
of flowers per square meter (727.93), flower dry weight per square meter
(140.58 g), potassium content of aerial part (0.9 mg/L), essential oils content
per square meter (0.27 g) and carotenoids content in petals (8.24 mg/L) were
obtained from plants grown under soil conditions containing 300 kg/ha K2SO4
and with square arrangement. The results of current study recommend using of
300 kg/ha of K2SO4 and square planting arrangement for increasing the yield
and essential oils content of calendula.
