@article{SEDGHI_PIRZAD_AMANPOUR-BALANEJI_2011, title={Light Absorption and Carotenoid Synthesis of Pot Marigold (Calendula officinalis L.) in Response to Phosphorous and Potassium Varying Levels}, volume={3}, url={https://www.notulaebiologicae.ro/index.php/nsb/article/view/5463}, DOI={10.15835/nsb315463}, abstractNote={<p style="text-align: justify;">In order to provide additional information on the effects of elemental deficiency on factors that affect plant production in medicinal plants, a factorial field experiment as randomized complete block design was conducted on Calendula officinalis. Treatments were four phosphorus levels (P2O5) including 0, 40, 80 and 120 Kg ha-1 and four potassium levels (K2O) as 0, 50, 100 and 150 Kg ha-1. Results showed that applied treatments had significant effects on petal carotenoids and the highest amount of ? - carotene obtained at 80 and 150 Kg ha-1 P2O5 and K2O, respectively. Effect of K2O on light interception and light use efficiency was significant and the highest radiation use efficiency achieved by applying 150 Kg ha-1 K2O. The highest yield of grain and dry flowers was recorded in the mixture of 80 and 150 Kg ha-1 P2O5 and K2O, respectively. In conclusion, using of K2O had greater effects on studied traits than P2O5.</p>}, number={1}, journal={Notulae Scientia Biologicae}, author={SEDGHI, Mohammad and PIRZAD, Alireza and AMANPOUR-BALANEJI, Bahman}, year={2011}, month={Mar.}, pages={46–50} }