TY - JOUR AU - SEDGHI, Mohammad AU - PIRZAD, Alireza AU - AMANPOUR-BALANEJI, Bahman PY - 2011/03/07 Y2 - 2024/03/28 TI - Light Absorption and Carotenoid Synthesis of Pot Marigold (Calendula officinalis L.) in Response to Phosphorous and Potassium Varying Levels JF - Notulae Scientia Biologicae JA - Not Sci Biol VL - 3 IS - 1 SE - Research articles DO - 10.15835/nsb315463 UR - https://www.notulaebiologicae.ro/index.php/nsb/article/view/5463 SP - 46-50 AB - <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> ER -