the effects of nitrogen fertilizer sources on yield and some quality attributes of chrysanthemum morifolium l.

Nitrogen is a crucial nutrient affecting plant growth and development and its addition to the soil (as chemical or organic form) influences plant growth characteristics. one experiment was conducted as a factorial based on rcbd with two chrysanthemum cultivars (‘fred’ and ‘angel’( and two n-fertilizer sources [urea (75 and 150 kg /h and nitroxin 7.5 and 15 l /ha] used as fertigation method beside control treatment with three replications. the results revealed that the greatest petals carotenoids content was belonged to 15 liter/ha nitroxin and the least data for total phenolics was recorded in the control treatment with ‘angel’. urea at 150 kg / ha increased the total phenolics content. the high chlorophyll a content was obtained with nitroxin (15 l / ha) with ‘fred’ and urea (150 kg /h) with ‘angel’. the least chlorophyll b content was recorded with 150 kg / ha urea at ‘angel’. roots dry weight (15 l /ha nitroxn), stem dry weight (15 l nitroxin and 150 kg /ha urea) were positively affected in ‘fred’. fertilizers application positively affected root fresh weight in both cultivars. the highest content of anthocyanin (19.3 μmol g^-1 fwt) was recorded in ‘angel’ cultivar. anthocyanin content was also influenced by 150 kg / ha urea (19.2 μmol g^-1 fwt) and 15 l/ha nitroxin (18.4 μmol g^-1 fw). the highest amount of shoot number (12.6) was recorded in ‘fred’ cultivar. with any increase in the fertilizer levels, flowers fresh weight and shoot numbers were significantly increased.