A pot experimental trial was carried out during 2017
and 2018 seasons, to study the effect of 16 treatments, which were
represented by the combination s be tween four concentrations of
benzyladenine (BA), i.e. 0, 50, 75 and 100 ppm and kristalon fertiliz er
rate s at 0, 3 , 5 and 7 g/pot on the growth and chemical constituents of
Cupressus macrocarpa plant. Results declared that all tested
concentrations of BA i nc reased plant height , No. of branches/plant,
s tem diameter, fresh , dry weights of shoots / plant , fresh, dry weights of
roots /plant, as well as chemical constituents parameters i.e. N, P and K
in the leaves , total carbohydrates, t otal chlorophylls and carot en oids
contents, with an evident for the high rates of benzyladenine compared
to untreated control plants in both seasons. On the other hand, all
levels of kristalon chemical fertilizer significantly enhanced all the
above-mentioned parameters, especially us ing the high level at 7 g/pot
in both seasons . In addition , most of the applied combinations of
benzyladenine and levels of kristalon fertilizer improved all the studied
parameters in the two seasons, particularly using the combinations
between BA at 100 ppm and kristalon fertilizer at 7 g/pot in both
seasons. Conclusively, spraying Cupressus macrocarpa plant with
benzyladenin at 100 ppm and supplemented with kristalon as chemical
fertilizer at 7 g/pot produced the best growth and quality of Cupressus
macro carpa L. plant.