Abstract :
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 ?mol g-1 FWt) was recorded in ‘Angel’ cultivar. Anthocyanin
content was also influenced by 150 kg / ha Urea (19.2 ?mol g-1
FWt) and 15 L/ha Nitroxin (18.4 ?mol 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.
